CN101998591B - Cell search method and user equipment - Google Patents
Cell search method and user equipment Download PDFInfo
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- CN101998591B CN101998591B CN200910162361.5A CN200910162361A CN101998591B CN 101998591 B CN101998591 B CN 101998591B CN 200910162361 A CN200910162361 A CN 200910162361A CN 101998591 B CN101998591 B CN 101998591B
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- user group
- signed user
- group cell
- closed signed
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W84/00—Network topologies
- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
- H04W84/04—Large scale networks; Deep hierarchical networks
- H04W84/042—Public Land Mobile systems, e.g. cellular systems
- H04W84/045—Public Land Mobile systems, e.g. cellular systems using private Base Stations, e.g. femto Base Stations, home Node B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The embodiment of the invention discloses a cell search method and user equipment (UE), and relates to the technical field of communication. The method relieves the complexity of a UE reselection cell and reduces power consumption. The method comprises the following steps of: acquiring closed signed user group cell information from broadcast information of a macro cell; if the closed signed user group cell information is consistent with the fingerprint information of a stored closed signed user group cell, determining the closed signed user group cell corresponding to the closed signed user group cell information as a matched closed signed user group cell; and performing search in the range of the matched closed signed user group cell. Compared with the conventional automatic search method, the method has the advantages that: the range of the search cell of the UE is reduced, and the purposes of reducing cell reselection complexity and saving power are fulfilled. The technical scheme provided by the embodiment of the invention can be widely applied to communication systems and communication equipment.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of small region search method, Apparatus and system.
background technology
As shown in Figure 1: UE is in the signal cover of macrocell A; Macrocell B is adjacent with macrocell A; Community C, D, E, F, G and K are CSG (Closed Subscriber Group, closed signed user group) communities.CSG community C is in the signal cover of macrocell A; CSG community D and E are in the signal cover of macrocell B; The edge that CSG community F, G and K cover at the signal of macrocell B.
UE is resident/access GuoCSG community D, E, F, G and K in the past, and therefore UE stores the finger print information of CSG community D, E, F, G and K; This finger print information includes but not limited to frequency, scrambler, the position of CSG community.Because CSG community D and E are in the signal cover of macrocell B, finger print information also comprises: the corresponding relation of CSG community and macrocell B.UE self maintained a white list, this white list has been stored the signing information that can access CSG community of this UE, as CSG ID, and corresponding frequency information, PSC (Primary Scrambling Code, main scrambler) information etc.
Fingerprint matching triggers automatic search.The object of automatic search finds CSG community.Existing automatic search process is passive and is a sensu lato search.Hunting zone is very wide, comprises HeCSG community, all common communities.Cause the power consumption of UE to increase.
When UE moves to macrocell B from macrocell A; UE determines own in the signal cover of macrocell B from the broadcast of macrocell B.UE, according to the corresponding relation of CSG community and macrocell B, knows in the signal cover of macrocell B YouCSG community D and E.UE according in the past storage resident/access GuoCSG community, know that this macrocell B came.This process is called in the industry fingerprint matching.
Fingerprint matching triggers automatic search.The object of automatic search finds CSG community.Existing automatic search process is passive and is a sensu lato search.Hunting zone is very wide, comprises HeCSG community, all common communities.Cause the power consumption of UE to increase.
When searching CSG community; UE checks that GaiCSG community is whether in described white list, if this CSG ID not in white list, UE also can on and on periodically go to attempt search CSG community so, reads broadcast.So just more take electricity.
Summary of the invention
On the one hand, the embodiment of the present invention provides a kind of small region search method, to reduce the power consumption of UE.
For achieving the above object, the embodiment of the present invention adopts following technical scheme:
A kind of small region search method, comprising:
From the broadcast message of the macrocell at place, obtain closed signed user group cell information;
If closed signed user group cell information is consistent with the finger print information of the closed signed user group cell of storage, this corresponding closed signed user group cell of closed signed user group cell information is coupling closed signed user group cell;
Within the scope of coupling closed signed user group cell, search for.
On the other hand, the embodiment of the present invention provides a kind of subscriber equipment, and this subscriber equipment, can the amount of saving energy in the time carrying out Cell searching.
For achieving the above object, the embodiment of the present invention adopts following technical scheme:
A kind of subscriber equipment, comprising:
Acquisition of information module, for the broadcast message of the macrocell from place, obtains closed signed user group cell information;
Fingerprint matching module, if closed signed user group cell information is consistent with the finger print information of the closed signed user group cell of storage, this corresponding closed signed user group cell of closed signed user group cell information is coupling closed signed user group cell;
Search module, within the scope of coupling closed signed user group cell, searches for.
In embodiments of the present invention, all adjacent CSG cell informations of macrocell broadcast.Therefore, UE can directly obtain the CSG cell information in macrocell signal cover, and the CSG cell information being adjacent.In these CSG communities, find out coupling CSG community.UE only, in the coupling CSG cell range of obtaining, searches for.Compared with existing automatic search, reduce the scope of user equipment searches community, reach and reduced the complexity of cell reselection and the object of economize on electricity.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is Cell searching application scenarios schematic diagram;
Fig. 2 is the schematic flow sheet of embodiment of the present invention small region search method;
Fig. 3 is the schematic flow sheet of embodiment of the present invention fingerprint matching;
Fig. 4 is the schematic flow sheet of an embodiment of the present invention search CSG community method;
Fig. 5 is the schematic flow sheet of another embodiment of the present invention search CSG community method;
Fig. 6 is the structural representation of subscriber equipment;
The attach most importance to structural representation of modeling piece one embodiment of Fig. 7;
The attach most importance to structural representation of another embodiment of modeling piece of Fig. 8.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described.Obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
In order to reduce complexity, the minimizing UE power consumption of cell reselection.The embodiment of the present invention provides a kind of small region search method, as shown in Figure 2, comprising:
201, from the broadcast message of the macrocell at place, obtain CSG cell information;
202, judge that closed signed user group cell information is consistent with the fingerprint letter of the closed signed user group cell of storage, this corresponding closed signed user group cell of closed signed user group cell information is coupling closed signed user group cell;
203 in the coupling CSG cell range of obtaining, and searches for.
In embodiments of the present invention, all adjacent CSG cell informations of macrocell broadcast.Therefore, UE can directly obtain the CSG cell information in macrocell signal cover, and the CSG cell information being adjacent.In these CSG communities, find out coupling CSG community.In the coupling CSG cell range of only obtaining at UE, search for.Compared with existing automatic search, reduce the scope of user equipment searches community, reach and reduced the complexity of cell reselection and the object of economize on electricity.
Below the method for cell reselection is described in further detail:
201, from the broadcast message of the macrocell at place, obtain CSG cell information
As shown in Figure 1: UE, CSG community D and E are in the signal cover of macrocell B; CSG community C, F, G and K are the adjacent C SG communities of macrocell B.In embodiments of the present invention, macrocell B not only broadcasts the cell information of CSG community D and E, also broadcasts the cell information of adjacent C SG community C, F, G and K.In Fig. 1, only show four adjacent C SG communities, in reality, should have multiple such adjacent C SG communities.
UE reads the broadcast message of macrocell B, just can obtain the cell information of macrocell B signal cover Nei CSG community and the cell information of adjacent C SG community.
202, judge that closed signed user group cell information is consistent with the finger print information of the closed signed user group cell of storage, this corresponding closed signed user group cell of closed signed user group cell information is coupling closed signed user group cell; This step specifically comprises following process:
The finger print information of memory resident/access Guo CSG community as shown in Figure 3,301,
UE is resident/access GuoCSG community D, E, F, G and K in the past, and therefore UE stores the finger print information of CSG community D, E, F, G and K; This finger print information includes but not limited to frequency, scrambler, the position of CSG community, the corresponding relation of CSG community and place macrocell;
When UE moves to macrocell B from macrocell A; UE determines own in the signal cover of macrocell B from the broadcast of macrocell B.UE, according to the corresponding relation of CSG community and macrocell B, determines in the signal cover of macrocell B, YouCSG community D, E, F, G and K.Then determine the finger print information such as frequency, scrambler, position of CSG community D, E, F, G and K.
302, judge that whether CSG cell information is consistent with the finger print information of storage CSG community; This step specifically comprises following process:
The CSG cell information YuCSG community D, E, F, G and the K finger print information that from broadcast, obtain are contrasted;
If there are two the consistent CSG of information communities, as D, E and F fingerprint matching, and UE once accessed Zhe Sange community, and trigger the search to Zhe Sange community;
If inconsistent, as G and K, although UE has stored finger print information, but some information of G and K have occurred to change and have caused the finger print information of UE storage expired for some reason, thereby cause fingerprint not mate, before UE, do not access G and K Zhe Liangge community, UE does not search for Dui Zheliangge community, deletes the finger print information (expired) of Zhe Liangge community simultaneously;
203, in the coupling CSG cell range of obtaining, search for.
In embodiments of the present invention, in the coupling CSG cell range of only obtaining at UE, search for.Compared with existing automatic search, reduce the scope of user equipment searches community, reach and reduced the complexity of cell reselection and the object of economize on electricity.
So far, cell search process finishes.
When fingerprint does not mate, carry out the search of adjacent area around according to current mechanism, closed signed user community is got rid of in hunting zone.Carry out cell reselection simultaneously.This is prior art, repeats no more.
According to Search Results, determine gravity treatment CSG community.As shown in Figure 4,5, detailed process is as follows:
401, determine the signal quality of coupling CSG community;
402,, from described coupling CSG community, select-out signal quality meets access threshold value CSG community, as candidate CSG community;
403, the signal quality of described candidate CSG community is sorted from high to low.
Choosing of following step ShiCSG community.Divide and be introduced in two kinds of situation below: one is that UE self maintained has white list, this white list has been stored the signing information that can access CSG community of this UE, as CSG ID, and corresponding frequency information, PSC (Pr imary Scrambling Code, main scrambler) information etc.One is that UE self does not safeguard white list.
One, UE self does not safeguard white list
404 ', choose the signal quality CSG community that makes number one, as gravity treatment CSG community.
405 ', to network side launch position district (LA)/Route Area (RA) renewal process: the success of location area/routing area renewal process, subscriber equipment resides in current area.
406 ', location area/routing area upgrades unsuccessfully, subscriber equipment is selected the community of sequence second, as gravity treatment CSG community.Carry out 405 ' step and start to pass judgment on, by that analogy.
Two, UE self maintained has white list
404 ", choose the signal quality CSG community that makes number one;
405 ", read the broadcast of described CSG community, obtain CSG ID;
UE uses corresponding scrambler to remove to measure the signal of community in corresponding frequencies;
UE reads the broadcast of CSG community and obtains CSG ID;
There is CSG indicator (instruction) CSG community in MIB (management information bank) message, be used to indicate whether ShiCSG community, Yi Ge community, if that instruction is Ture, shows ShiCSG community, this community, then UE removes to continue to read CSG ID again.This is prior art, repeats no more.
406 ", determine that this CSG ID is whether in the white list of UE;
If, Ze Gai CSG community is as re-selecting cell; To network side launch position district (LA)/Route Area (RA) renewal process: the success of location area/routing area renewal process, subscriber equipment resides in current area.
If do not existed, described CSG can not be served as re-selecting cell in community.Subscriber equipment is selected the community of sequence second, as gravity treatment CSG community.Carry out 405 ") step and start to pass judgment on, by that analogy.
Existing automatic search wide range, comprises HeCSG community, all common communities.While carrying out gravity treatment, to select different criterions for different situations.Complicated operation, very power consumption.
The embodiment of the present invention, has dwindled hunting zone, has simplified reselection criterion.Only use existing 3GPP standard agreement S criterion and R criterion to carry out cell reselection process.Step 401,402 has embodied S criterion; Step 403,404 ' embody R criterion (concept of the signal quality of step 403,404 ' described has specific definition in 3GPP standard agreement R criterion, no longer launches explanation herein).Compared with prior art simple to operate, save the electric weight of UE.
In above-mentioned two situations, if cannot determine gravity treatment CSG community, a timer is set.In timer timing time, within the scope of all adjacent areas outside Chu CSG community, search for.Timer expiry, then in described coupling CSG cell range, search again, to determine gravity treatment CSG community.
The setting of timer can be issued by broadcast.The timing length of timer is arranged by user.The standard value of supposing timer is T.Utilize multiplier factor to regulate the timing length of timer.
UE is in moving process, and the signal power of CSG community can change.In order to search in time CSG community, it is suitable that the timing length of timer arranges.
The setting of timer timing length: when subscriber equipment is during in high-speed motion state, move to the time that place that signal quality is strong needs from the place a little less than signal quality shorter.It is shorter that the timing length of timer can arrange.Can select to be less than 1 multiplier factor and take advantage of the value T of timer; When subscriber equipment is during in low-speed motion state, move to the time that place that signal quality is strong needs from the place a little less than signal quality long.It is longer that the timing length of timer can arrange.Selection is greater than 1 multiplier factor takes advantage of the value T of timer.Described multiplier factor can be issued by broadcast equally.
The embodiment of the present invention also provides a kind of subscriber equipment, as shown in Figure 6, comprise: memory module: for the finger print information of memory resident/access Guo CSG community, this finger print information includes but not limited to frequency, scrambler, the position of CSG community, the corresponding relation of CSG community and place macrocell;
Acquisition of information module, for the broadcast message of the macrocell from place, obtains CSG cell information; This CSG cell information comprises: the cell information of macrocell signal cover Nei CSG community and the cell information of adjacent C SG community;
Fingerprint matching module, if closed signed user group cell information is consistent with the finger print information of the closed signed user group cell of storage, this corresponding closed signed user group cell of closed signed user group cell information is coupling closed signed user group cell;
Search module, in the coupling CSG cell range of obtaining, searches for.
Gravity treatment module, in described coupling CSG cell range, determines gravity treatment CSG community.
As shown in Figure 7, when described subscriber equipment does not have white list, described gravity treatment module comprises: signal quality determining unit, for determining the signal quality of coupling CSG community;
Candidate CSG community determining unit, for from described coupling CSG community, select-out signal quality meets access threshold value CSG community, as candidate CSG community;
Sequencing unit, for sorting from high to low to the signal quality of described candidate CSG community;
Cell reselection unit, for choosing the signal quality CSG community that makes number one, as gravity treatment CSG community;
Timer, in timer timing time, in all cell range, (macrocell, He Fei CSG community, CSG community) searched for.Timer expiry, then in described coupling CSG cell range, search again, to determine gravity treatment CSG community.
As shown in Figure 8, when described subscriber equipment self maintained has white list; Described gravity treatment module also comprises:
CSG chooses unit in community, for choosing the signal quality CSG community that makes number one;
Mark acquiring unit, for reading the broadcast of described CSG community, obtains CSG ID;
Described cell reselection unit, for determining that this CSG ID is whether at the white list of UE; If, gravity treatment GaiCSG community.
Timer, in timer timing time, in all cell range, (macrocell, He Fei CSG community, CSG community) searched for.Timer expiry, then in described coupling CSG cell range, search again, to determine gravity treatment CSG community.
One of ordinary skill in the art will appreciate that all or part of flow process realizing in above-described embodiment method, can carry out the hardware that instruction is relevant by computer program to complete, described program can be stored in a computer read/write memory medium, this program, in the time carrying out, can comprise as the flow process of the embodiment of above-mentioned each side method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory, ROM) or random store-memory body (Random Access Memory, RAM) etc.
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited to this, any be familiar with those skilled in the art the present invention disclose technical scope in; can expect easily changing or replacing, within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (6)
1. a small region search method, is characterized in that, comprising:
From the broadcast message of the macrocell at place, obtain closed signed user group cell information;
If closed signed user group cell information is consistent with the finger print information of the closed signed user group cell of storage, this corresponding closed signed user group cell of closed signed user group cell information is coupling closed signed user group cell;
Within the scope of coupling closed signed user group cell, search for, and according to Search Results, determine the signal quality of coupling closed signed user group cell;
From described coupling closed signed user group cell, select-out signal quality meets the closed signed user group cell of access threshold value, as candidate closed signed user group cell;
Signal quality to described candidate closed signed user group cell sorts from high to low;
Choose the closed signed user group cell that signal quality makes number one, as re-selecting cell;
In the time that re-selecting cell all cannot be served as in all described couplings closed signed user group cell, stop current search, start timer, and judge whether the signal quality of described macrocell meets access threshold value;
If meet resident described macrocell; If do not meet, search for other communities;
After described timer expiry, then within the scope of described coupling closed signed user group cell, search again, to determine gravity treatment closed signed user group cell;
Wherein, the multiplier factor that the timing length of described timer is issued by the timing cycle of presetting and broadcast is determined.
2. small region search method according to claim 1, is characterized in that, from the broadcast message of the macrocell at place, also comprises before obtaining the step of closed signed user group cell information:
The finger print information of the closed signed user group cell of memory resident/accessed, this finger print information comprises below at least one: the corresponding relation of frequency, scrambler, position, closed signed user group cell and the place macrocell of closed signed user group cell.
3. small region search method according to claim 1, it is characterized in that, described closed signed user group cell information comprises: the cell information of the closed signed user group cell in macrocell signal cover and the cell information of adjacent closed signed user group cell.
4. small region search method according to claim 1, is characterized in that, chooses the closed signed user group cell that signal quality makes number one, and comprises as the step of re-selecting cell:
Choose the closed signed user group cell that signal quality makes number one;
Read the broadcast of described closed signed user group cell, obtain closed signed user group mark;
Determine that this closed signed user group mark is whether in the white list of UE;
If, this closed signed user group cell of gravity treatment;
If do not existed, re-selecting cell can not be served as in described closed signed user group cell.
5. a subscriber equipment, is characterized in that, comprising: acquisition of information module, for the broadcast message of the macrocell from place, obtain closed signed user group cell information;
Fingerprint matching module, if closed signed user group cell information is consistent with the finger print information of the closed signed user group cell of storage, this corresponding closed signed user group cell of closed signed user group cell information is coupling closed signed user group cell;
Search module, for searching within the scope of coupling closed signed user group cell;
Gravity treatment module, for passing through signal quality determining unit according to Search Results, determines the signal quality of coupling closed signed user group cell; By candidate closed signed user group cell determining unit, from described coupling closed signed user group cell, select-out signal quality meets the closed signed user group cell of access threshold value, as candidate closed signed user group cell; By sequencing unit, the signal quality of described candidate closed signed user group cell is sorted from high to low; The closed signed user group cell making number one by cell reselection unit selection signal quality, as re-selecting cell; In timer timing time, in all cell range, to search for, described all communities comprise described macrocell, He Fei closed signed user group cell, closed signed user group cell; Timer expiry, then within the scope of described coupling closed signed user group cell, search again, to determine gravity treatment closed signed user group cell;
Wherein, the multiplier factor that the timing length of described timer is issued by the timing cycle of presetting and broadcast is determined.
6. subscriber equipment according to claim 5, is characterized in that, described subscriber equipment self maintained has white list; Described gravity treatment module comprises:
Unit is chosen in closed signed user group cell, the closed signed user group cell making number one for choosing signal quality;
Mark acquiring unit, for reading the broadcast of described closed signed user group cell, obtains closed signed user group mark;
Described cell reselection unit, for determining that this closed signed user group mark is whether at the white list of UE; If, this closed signed user group cell of gravity treatment.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN200910162361.5A CN101998591B (en) | 2009-08-13 | 2009-08-13 | Cell search method and user equipment |
| PCT/CN2010/075953 WO2011018047A1 (en) | 2009-08-13 | 2010-08-13 | Cell search method and user equipment |
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| CN200910162361.5A CN101998591B (en) | 2009-08-13 | 2009-08-13 | Cell search method and user equipment |
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| CN101998591A CN101998591A (en) | 2011-03-30 |
| CN101998591B true CN101998591B (en) | 2014-08-06 |
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| US20120269095A1 (en) * | 2011-04-20 | 2012-10-25 | Nokia Siemens Networks Oy | Method and apparatus for providing a network search function |
| CN102781056B (en) * | 2011-05-12 | 2017-06-27 | 上海无线通信研究中心 | A kind of mobile terminal changing method of blended family's cell |
| CN102395165B (en) * | 2011-10-25 | 2017-06-30 | 南京中兴软件有限责任公司 | The searching method and device of a kind of CSG cell |
| CN103327554A (en) * | 2012-03-19 | 2013-09-25 | 中兴通讯股份有限公司 | Redirecting method and redirecting device |
| CN106304216A (en) * | 2015-06-12 | 2017-01-04 | 深圳市中兴微电子技术有限公司 | A kind of residence reselecting, device and mobile terminal |
| CN107484186A (en) * | 2016-06-08 | 2017-12-15 | 展讯通信（上海）有限公司 | A kind of user equipment and its method for re-selecting cell |
| CN107484202A (en) * | 2016-06-08 | 2017-12-15 | 展讯通信（上海）有限公司 | The method and user equipment that a kind of CSG neighbours configured information reports |
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| WO2009088824A1 (en) * | 2008-01-02 | 2009-07-16 | Interdigital Patent Holdings, Inc. | Manual cell detection and selection procedures |
| CN101610446A (en) * | 2008-06-16 | 2009-12-23 | 华为技术有限公司 | Limited closed subscriber group cells searching method, system and equipment |
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- 2010-08-13 WO PCT/CN2010/075953 patent/WO2011018047A1/en active Application Filing
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| Qualcomm Europe.The myth of fingerprints: Identifying home eNBs.《3GPP TSG-RAN WG2 #63》.2008, |
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| WO2011018047A1 (en) | 2011-02-17 |
| CN101998591A (en) | 2011-03-30 |
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