CN102138353A - Method and device for selecting cell - Google Patents

Method and device for selecting cell Download PDF

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Publication number
CN102138353A
CN102138353A CN2009801236875A CN200980123687A CN102138353A CN 102138353 A CN102138353 A CN 102138353A CN 2009801236875 A CN2009801236875 A CN 2009801236875A CN 200980123687 A CN200980123687 A CN 200980123687A CN 102138353 A CN102138353 A CN 102138353A
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China
Prior art keywords
cell
target cell
target
list
frequency
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Chinese (zh)
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戴明增
黄敏
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Huawei Technologies Co Ltd
Huawei Device Shenzhen Co Ltd
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/20—Selecting an access point

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

A method and a device for selecting cell are provided. The method for selecting cell includes: UE obtaining an indication massages in a system massages of the whole or part of target cells in a target cell list, and the indication massage being an indication A for indicating a domain supported by the target cell, or an indication B for indicating whether the target cell supporting CS domain, or an indication C for indicating whether the target cell only supporting PS domain; the UE selecting a first target cell in the target cell list according to the indication information, the indication information in the system massage of the first target cell indicating that the target cell supports CS domain. By adopting the schemes of the present invention, UE could identify whether the awaiting network supports CS domain before reselecting a new cell, which enables the UE to reselect the one-off network supporting CS domain and avoid the problem that the UE could not initiate an emergent call in time when it selects to a cell only supporting CS domain only.

Description

The method and apparatus for selecting cell
Select the method and apparatus technical field of cell
The present invention relates to communication technical field, the method and apparatus for more particularly to selecting cell.Background technology
In existing long evolving system（Long Term Evolution, LTE) in, if not disposing IP multimedia systems（IP Multimedia Subsystem, IMS), user equipment（User Equipment UE) CS domain droppings can be passed through（Circuit Switched Fallback, CS FB) technology returns to the network for supporting CS domains, the circuit domain business of CS networks offer reused to initiate urgent call.UE is when CS domains registration failure, or location area updating (Location Area Update, LAU) fail, or UE resides in acceptable cell（Acceptable cell) when, UE can not initiate CS FB, then UE needs cell selection or cell reselection to CS domains network, to initiate urgent call.
In cell selection and cell reselection technique, UE can decide whether to be resident the cell according to the confined condition of cell reselection/selection.For example, trace regions (Tracking Area, TA) marks and public land mobile network of the UE in system message of target cell（Public Land Mobile Network, PLMN) mark judges whether TA and PLMN is confined area, if it is, the UE will prohibit to fall (bar) cell and frequency where the cell for a period of time, maximum duration is 300 seconds.
In process of the present invention is realized, inventor has found that prior art has the following problems：When UE is resided in the network for only supporting ps domain or in acceptable cell, it is impossible to urgent call is initiated in time, so that it is less efficient to cause UE to meet an urgent need.The content of the invention
The method and apparatus that the embodiment of the present invention provides selection cell, can solve the problem that and reside in the network for only supporting PS domains or when in acceptable cell, it is impossible to initiate the technical problem of urgent call in time, and then improves UE and meet an urgent need efficiency.
The embodiment of the present invention provides a kind of method for selecting cell, including：
User equipment (UE) obtains the configured information in the system message of all or part of Target cell in target cell list, and the configured information is：Instruction A for indicating the domain that the Target cell is supported, either for indicating whether only whether Target cell support the instruction B or instruction Target cell in CS domains Support the instruction c of ps domain;
The UE selects the configured information in the first object cell into the target cell list, the system message of the first object cell to indicate that the Target cell supports CS domains according to the configured information.
The embodiment of the present invention also provides a kind of method for selecting cell, including：
User equipment (UE) is selected to first object cell；Wherein,
First object cell is one of Target cell in target cell list, and the target cell list is only comprising the Target cell for supporting CS domains；And/or,
The frequency of first object cell is one of frequency in target frequency list, and the target frequency list is only comprising the target frequency for supporting CS domains.
The embodiment of the present invention also provides a kind of method for selecting cell, including：
When user equipment (UE) determines that Target cell meets cell confined condition, cancel cell confined condition, and select to the Target cell.
The embodiment of the present invention also provides a kind of user equipment, including：
Acquiring unit, for obtaining the configured information in target cell list in the system message of all or part of Target cell, the configured information is：Instruction A for indicating the domain that the Target cell is supported, either for indicating whether the Target cell supports whether the instruction B or the instruction Target cell in CS domains only support the instruction C of ps domain;And,
Selecting unit, for being selected the configured information in the first object cell into the target cell list, the system message of the first object cell to indicate that the Target cell supports CS domains according to the configured information.
The embodiment of the present invention also provides a kind of user equipment, including：
Selecting unit, for selecting to first object cell；Wherein, the first object cell is one of Target cell in target cell list, and the target cell list is only comprising the Target cell for supporting CS domains；And/or, the frequency of the first object cell is one of frequency in target frequency list, and the target frequency list is only comprising the target frequency for supporting CS domains.
Therefore, UE is recognized before new cell is reselected in the embodiment of the present invention treats whether reselecting network supports CS domains, UE is enabled disposably to reselect to the network for supporting CS domains, it is to avoid UE reselects to the problem of only supporting the cell of ps domain and can not initiate urgent call in time.In addition, UE can also be in choosing to cancelling cell confined condition before new cell in the embodiment of the present invention so that UE can select to Cell in cell confined condition, so that the problem of avoiding that urgent call can not be initiated in time due to the limitation of cell confined condition.Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, the required accompanying drawing used in embodiment or description of the prior art will be briefly described below, apparently, drawings in the following description are only some embodiments of the present invention, for those of ordinary skill in the art, on the premise of not paying creative work, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the method schematic diagram that the embodiment of the present invention one is provided；
Fig. 2 is the method schematic diagram that the embodiment of the present invention four is provided；
Fig. 3 is the method schematic diagram that the embodiment of the present invention seven is provided；
Fig. 4 is the equipment schematic diagram that the embodiment of the present invention eight is provided.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, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art are obtained under the premise of creative work is not made belongs to the scope of protection of the invention.
It is to be noted that, the goal systems being related in various embodiments of the present invention is the system where Target cell, the good business cells of frequency J where target frequency refers to Target cell are cell that current UE is resident, candidate cell when Target cell does selection cell for UE.
As shown in Fig. 1, the embodiment of the present invention one provides a kind of method for selecting cell, and the present embodiment includes：
S 101, UE obtain the configured information in the system message of all or part of Target cell in target cell list, and the configured information is：Instruction A for indicating the domain that the Target cell is supported, either for indicating whether Target cell supports whether the instruction B or instruction Target cell in CS domains only support the instruction C of ps domain;
S102, the UE select the first object into the target cell list small according to the configured information Configured information in area, the system message of the first object cell indicates that the Target cell supports CS domains.The CS domains of UE in the present embodiment in system message of target cell indicate to carry out cell selection, so as to realize a Sexual behavior mode to the network for supporting CS domains, it is to avoid UE select to only support the network of ps domain and the problem of urgent call can not be initiated in time.
Optionally, the configured information in the present embodiment indicates that Target cell supports CS domains to include：Indicate that the domain that A indicates that Target cell is supported is CS domains；Or indicate that B indicates that Target cell supports that the state in CS domains is yes；Indicate that C indicates that Target cell only supports the state of ps domain to be no.
Optionally, the target cell list in the present embodiment can UE obtain or stored by UE itself from network entity.Further, UE is got after configured information, target cell list can also be updated according to configured information.
Optionally, when UE in the present embodiment gets more than one configured information and indicates that its corresponding Target cell supports CS domains, a Target cell can be randomly choosed as first object cell, or it regard the best Target cell of signal quality as first object cell, or the most forward Target cell that will sort is as first object cell, and select to first object cell；, can be using the Target cell as first object cell when UE in the present embodiment gets a configured information and indicates that its corresponding Target cell supports CS domains, and select to the first object cell；Can also first it judge whether Target cell as first object cell, if it is, UE is selected to the first object cell, otherwise UE obtains the configured information in the system message of other Target cells in target cell list.
The embodiment of the present invention two is provided in a kind of method for selecting cell, the present embodiment, and UE is selected to first object cell；Wherein, first object cell is one of Target cell in target cell list, and the target cell list is only comprising the Target cell for supporting CS domains；And/or, the frequency of first object cell is one of frequency in target frequency list, and the target frequency list is only comprising the target frequency for supporting CS domains.
UE in the present embodiment carries out cell selection in only comprising the target cell list or target frequency list for supporting CS domains, Sexual behavior mode can be realized to the network for supporting CS domains, it is to avoid UE select to only support the network of ps domain and the problem of urgent call can not be initiated in time.
Optionally, the UE in the present embodiment can with itself storage or from network entity directly/the indirect gain target cell list and/or target frequency list.Further, UE can heighten the priority of Target cell/frequency in target cell list/target frequency list.
Optionally, UE can randomly choose a Target cell in target cell list as the first mesh Cell is marked, either using the best Target cell of signal quality in target cell list as first object cell or the most forward Target cell that will be sorted in target cell list is as first object cell, and is selected to first object cell.Further, UE can include in selection to first object cell：Whether the frequency for judging the first object cell is one of frequency in target frequency list, if it is, selection is to the first object cell.
Optionally, UE can randomly choose Target cell under a frequency in target frequency list as first object cell, or it regard the best Target cell of signal quality under all or part of frequency in target frequency list as first object cell, or using the Target cell sorted in target frequency list under most forward frequency as first object cell, and select to first object cell.Further, UE can include in selection to first object cell：Whether be Target cell in target cell list one of, if it is, selection is to the first object cell if judging the first object cell.
The embodiment of the present invention three provides a kind of method for selecting cell, and the present embodiment includes：When UE determines that Target cell meets cell confined condition, cancel cell confined condition, and select to the Target cell.Wherein, cell confined condition includes：Target cell is located at the limited tracking fields Τ Α or position field LA or Routing Area of roaming（Routing Area, RA), and/or, the Public Land Mobile Network where Target cell（Public Land Mobile Network, PLMN) PLMN that registers with it is equivalent.
The present embodiment can be by cancelling cell confined condition so that UE can be selected to limited Target cell, to have detectd urgent call.
Optionally, before the UE in the present embodiment determines that Target cell meets cell confined condition, the present embodiment also includes：UE determines to select (Any cell selection) state from as any cell, or resides in any cell（Camped on any cell state) state, or can not find the state of suitable cell.
As shown in Fig. 2 the embodiment of the present invention four provides a kind of method for selecting cell, UE can select cell by the configured information got.Specifically, the present embodiment comprises the following steps：
S401, UE obtain target cell list.
Wherein, the target cell list can include supporting the Target cell in CS domains and support Target cell of ps domain etc..It is preferred that, the Target cell in the cell list can be according to priority（Such as gravity treatment priority）, or the list being ranked up according to other preparatory conditions.
Specifically, UE is from other network entities（Such as eNB) obtain the list.It is preferred that, UE can Choosing, UE preserves the list after sequence, and/or, the list after sequence is sent to other network entities, for example, preserves the network entity of above-mentioned target cell list.
The target cell list acquisition methods provided in the prior art are applied to this step；This step is optional step, and when UE itself stores the list, UE can not obtain the list from other network entities.
5402nd, UE obtains the configured information in the system message of all or part of Target cell in target cell list, and the configured information is used to indicate the domain that the Target cell is supported.
It is preferred that, UE can be measured according to preparatory condition, such as cell reselection priority to the cell in the list, and ^^ reads the configured information in the system message of sequence highest cell according to measurement result；
Optionally, UE can obtain the configured information in the system message of each Target cell successively according to the order of Target cell in the list.For example：UE ^ according to Target cell priority order from high to low, obtain the configured information in the system message of target complete cell, when the Target cell in the list is ranked up according to priority, UE obtains the configured information in each system message of target cell since the first aim cell in the list, successively.UE can also obtain the configured information in the system message of partial target cell in the list, for example only obtain highest priority Target cell system message in configured information, or meet other preparatory conditions Target cell system message in configured information.
Optionally, when the UE in this step can indicate that the Target cell supports CS domains in the configured information in getting corresponding system message, the configured information in the system message of other Target cells in target cell list is no longer obtained.
Optionally, UE in this step can read the system message of more than one Target cell simultaneously, can also be in the configured information in the system message that the same time only obtains a Target cell, when the configured information indicates that the Target cell does not support CS domains, the system that UE reads next Target cell disappears
5403rd, the configured information in the first object cell that UE is reselected in the target cell list, the system message of the first object cell indicates that the Target cell supports CS domains.
In this step, if UE gets more than one configured information and indicates that its corresponding Target cell supports CS domains in S402, then UE can randomly choose one of Target cell as first object cell, can also be by the best Target cell of signal quality, or the most forward Target cell that sorts, or it is full The Target cell of other preparatory conditions of foot is used as first object cell.
In this step, if UE gets a configured information and indicates that its corresponding Target cell supports CS domains in S402, UE further can just can also judge whether as first object cell as first object cell according to other conditions.For example, the signal quality of the Target cell is poor, then UE can not be using the Target cell as first object cell, and is to continue with obtaining the configured information in above-mentioned target cell list in the system message of all or part of Target cell.
In the embodiment of the present invention four, CS domains of the UE in system message of target cell indicates to carry out cell reselection, so as to realize the disposable network for reselecting to support CS domains, it is to avoid UE reselects to the problem of only supporting the network of ps domain and can not initiate urgent call in time.
Further, the UE in the present embodiment four can update target cell list according to the configured information of acquisition.For example, configured information in the system message of certain Target cell indicates that the Target cell does not support CS domains, then UE can delete the Target cell from the list, or reduce the priority of the Target cell, either the position of the Target cell in the list is adjusted or the frequency where the Target cell or location area/routing area are prohibited to fall a period of time backward（Such as 300 seconds）.Optionally, the list after renewal can be sent to other network entities by UE.By the renewal to list, UE being capable of significantly more efficient carry out cell reselection, the further emergent efficiency of raising.
In addition, the present embodiment four, which is applied to UE, need to reselect to the scene for the Target cell for supporting CS domains.Specifically, UE order can perform above steps (including optional step when that need to reselect to the Target cell for supporting CS domains）, S401 can also be first carried out, order performs above-mentioned S402 and thereafter each step when that need to reselect to the Target cell for supporting CS domains（Including optional step）.Further, UE can be when following condition be met, it is determined that the Target cell for supporting CS domains need to be reselected to：Current state is Idle state, and the measurement result of serving cell signal quality is when meeting preparatory condition；Wherein, preparatory condition can be the measurement result of serving cell signal quality less than pre-determined threshold or the measurement result of other cells.
It should be noted that the configured information in the present embodiment four is used to indicate the domain that Target cell is supported, the configured information may be embodied in the system message of Target cell（Such as SIB3 or SIB4) in, specifically, configured information can take 2 bits, such as 10 represent to support CS domains, 01 represents to support PS domains, 11 are represented to support CS domains and ps domain, then corresponding Target cell is only possible to as first object cell when only first bit of configured information is 1.Above-described embodiment four also has two kinds of alternative solutions, i.e.,：The first, configured information is used to indicate whether Target cell supports CS domains, can take 1 bit, Such as 0 represents not supporting CS domains, and 1 represents to support CS domains；Second, configured information is used to indicate whether Target cell only supports ps domain, can take 1 bit, and such as 1 represents only to support ps domain, 0 is represented not only to support ps domain, it indicates that corresponding Target cell is only possible to as first object cell when information is 0.Specific steps using the alternative solution of above two configured information are similar with above-described embodiment four, no longer praise and state herein.
The embodiment of the present invention five provides a kind of method for selecting cell, and the present embodiment comprises the following steps：
S501, UE obtain target cell list, and the target cell list is only comprising the Target cell for supporting CS domains.
Wherein, the Target cell for supporting CS domains can be the Target cell for only supporting CS domains, or support CS domains to support the Target cell of ps domain again.
Optionally, the Target cell in the cell list can be according to priority（Such as gravity treatment priority）The list being ranked up.
Specifically, the list can be from other network entities（Such as eNB) obtain the list.It is preferred that, UE can carry out Target cell sequence, optionally, and UE preserves the list after sequence, and/or, other network entities are given by the row after sequence, for example, preserve the network entity of above-mentioned target cell list.Further, UE can directly or indirectly send a request message to network entity to obtain the list of entity offer, can also be by reading the system message of current service cell（Such as LTE system message SIB6) obtain the list.Optionally, UE is preserved after the list is got, or the list preserved to itself is updated.
In this step, UE can support the target cell list of ps domain to obtain only comprising the target cell list for supporting CS domains according to complete object cell list and only.For example, UE obtains complete object cell list by reading the system message of current service cell and only supports the target cell list in PS domains, then the target cell list only comprising support CS domains is the difference of above-mentioned two list, i.e. content equivalent to not comprising the content in the complete object cell list for appearing in the Target cell in the target cell list for only supporting ps domain.Further, UE will can only support the priority of the Target cell of ps domain to reduce in complete object cell list, and/or the priority of the Target cell in CS domains will be supported to raise in complete object cell list.
This step is optional step, and when UE itself stores the list, UE can not obtain the list from other network entities.
List in this step can include Target cell ID, the frequency information of objective network, cell weight Select parameter（Such as cell reselection priority or cell reselection thresholding）One of or any combination.
S502, UE reselect to first object cell, and the first object cell belongs to above-mentioned target cell list；
Specifically, UE can also can be measured at random using a certain Target cell in the list as first object cell to the Target cell in the list in this step, according to signal quality by a certain Target cell（The best Target cell of such as signal quality）It is used as first object cell；If the Target cell in the list has corresponding gravity treatment priority, UE can also be according to gravity treatment priority by a certain Target cell（Such as Target cell of gravity treatment highest priority）For first object cell.
In the embodiment of the present invention five, UE carries out cell reselection according to the list only comprising the Target cell for supporting CS domains, the disposable network for reselecting to and supporting CS domains can be realized, it is to avoid UE reselects to the problem of only supporting the network of ps domain and can not initiate urgent call in time.
The present embodiment five also a kind of alternative solution, the S501 of the alternative solution, similar with S501, difference is：The list that UE is obtained is target frequency list（The list of frequency where referring to Target cell）, the list is only comprising the target frequency for supporting CS domains.Accordingly, in the S502' of the alternative solution, UE reselects to first object cell, and the frequency of the first object cell belongs to above-mentioned target frequency list.
Further, in the S502' of the alternative solution, UE can reselect to first object cell by following either method：
(1) at random using the Target cell under a certain target frequency in the list as first object cell, and the cell is reselected to；
(2) Target cell under all or part of target frequency in the list is measured, according to signal quality by a certain Target cell（The best Target cell of such as signal quality）It is used as first object cell；
Specifically, UE can first select a target frequency in the list, and all or part of Target cell under the target frequency is measured, then UE selectes a Target cell according to measurement result and is used as first object cell；When the unselected Target cell of UE is as first object cell, UE can select another target frequency in the list and measure, until selected, a Target cell is as first object cell and reselects to the cell.
Or, UE can be measured to the Target cell under the target complete frequency in the list, and then UE selectes a Target cell according to measurement result and is used as first object cell.
Certainly, UE can also be measured to Target cell in other orders, for example, first measure each mesh Mark the Target cell of the gravity treatment highest priority under frequency, then selected a Target cell is as first object cell and reselects to the cell according to measurement result by ^^；When the unselected Target cell of UE is as first object cell, gravity treatment priority under each target frequency can be measured higher（But non-highest）Target cell and measure, until selected, a Target cell is as first object cell and reselects to the cell.
In the alternative solution of embodiment five, UE carries out cell reselection according to the list only comprising the target frequency for supporting CS domains, the disposable network for reselecting to and supporting CS domains can be realized, it is to avoid UE reselects to the problem of only supporting the network of ps domain and can not initiate urgent call in time.
In addition, the present embodiment five（Or its alternative solution）The scene for the Target cell for supporting CS domains need to be reselected to suitable for UE.Specifically, UE order can perform embodiment when that need to reselect to the Target cell for supporting CS domains（Or its alternative solution）In each step（Including optional step）, S501 (or S501' in alternative solution) can also be first carried out, order performs embodiment when that need to reselect to the Target cell for supporting CS domains（Or its alternative solution）In S501 (or S501 ' in alternative solution) after the step of.Further, UE can be when certain preparatory condition be met, it is determined that the Target cell for supporting CS domains need to be reselected to, specifically, the preparatory condition that the determination that above-described embodiment four is provided need to reselect to the Target cell for supporting CS domains is applied to embodiment five and its alternative solution, and here is omitted.
It should be noted that the embodiment of the present invention five and its alternative solution can be combined, UE reselects to first object cell, and the first object cell is in target cell list, and its frequency is in target frequency list.For example, UE can obtain target cell list and target frequency list, when UE determines first object cell according to the step of embodiment five, also check the frequency of the cell undetermined whether in target frequency list simultaneously, or, when determining first object cell the step of alternative solutions of the UE according to embodiment five, also check the Target cell whether in target cell list simultaneously.If inspection result is no, the cell undetermined cannot function as first object cell.And for example, UE can also be screened according to the content of target frequency list to the Target cell in target cell list, i.e.,：When the frequency of the Target cell in target cell list is not in target frequency list, the Target cell is screened out（As deleted or making marks or select to skip the cell during cell）, otherwise, the Target cell can be as cell undetermined, and the list that UE forms cell undetermined is as target cell list, by carrying out cell selection the step of embodiment five.
The embodiment of the present invention six provides a kind of method for selecting cell, and the embodiment comprises the following steps：Whether S601, UE judge goal systems comprising the Target cell/frequency for only supporting ps domain, if It is then to perform S602, otherwise performs S603;
It is preferred that, UE can read the system message of the good business cell of the moon（Such as SIB6), and just according to the identification information judgment in system message, for example, when goal systems is UMTS, the identification information in SIB6 can be indicated in the goal systems with the presence or absence of the HSPA+ networks for only supporting ps domain.Further, UE can be preserved the identification information in the system message of reading, or update the mark letter preserved optionally, if whether UE itself storages include the information for the Target cell for only supporting ps domain on goal systems domain, then UE can be judged according to itself storage information, the system message without reading service cell.
5602nd, UE can use above-described embodiment four or its alternative solution, reselect to the Target cell for supporting CS domains.
5603rd, UE can use above-described embodiment five or its alternative solution, reselect to the Target cell for supporting CS domains.
In the embodiment of the present invention six, UE first determines that goal systems supports the situation of CS domains and ps domain, situation further according to determination carries out cell reselection, the disposable network for reselecting to and supporting CS domains can be realized, it is to avoid UE reselects to the problem of only supporting the network of ps domain and can not initiate urgent call in time.
As shown in Fig. 3, the embodiment of the present invention seven provides a kind of method for selecting cell, and the present embodiment comprises the following steps：
S70K UE judge whether Target cell meets cell confined condition；If it is, performing S702, S703 is otherwise performed;
For example, the cell confined condition includes：Target cell is located at the limited tracking fields TA or position field LA or Routing Area RA of roaming, if Target cell, which is located at, roams limited TA, UE determines that Target cell meets cell confined condition, then performs S702.
And for example, the cell confined condition includes：The PLMN that PLMN where Target cell is not registered with it is equivalent, if UE determines that Target cell belongs to the PLMN equivalent with registration PLMN, performs S703.
5702nd, UE cancels cell confined condition, and reselects to the Target cell.
5703rd, the Target cell is reselected to.
The present embodiment can be by cancelling cell confined condition so that UE can reselect to limited Target cell, to have detectd urgent call. Further, the present embodiment can be combined with above-described embodiment four, five or alternative solution.For example, the UE in the present embodiment determines first object cell the step of offer by example IV（It wouldn't only select to the cell）, then UE judges whether the first object cell meets confined condition by S701, then accordingly performs S702 or S703.
Further, when UE is that any cell selects (Any cell selection) state, or UE is to reside in any cell（Camped on any cell state) state when, or UE is when being the state that can not find suitable cell, and UE performs S701.
It should be noted that the method for UE selections cell provided in an embodiment of the present invention carries out Cell Selection in start suitable for UE, (cell is selected, and is to be distinguished with cell reselection, hereinafter referred to as cell primary election）Scene and UE reside in after certain cell progress Cell Reselection (cell reselections）Scene, i.e.,：Various embodiments of the present invention illustrate that UE selects the detailed process of cell only so that UE carries out cell reselection as an example, and UE is carried out under the scene of cell primary election, method provided in an embodiment of the present invention is equally applicable, difference is, UE determines that the condition for reselecting to the Target cell for supporting CS domains should replace with UE and determine to carry out cell primary election in each embodiment, and the Target cell of the primary election should support CS domains.Specifically, UE can be when following either condition be met, it is determined that cell primary election need to be carried out to the Target cell for supporting CS domains：
(1) receiving network side need to select to during the instruction for the Target cell for supporting CS domains on UE；Wherein, the instruction can represent registration failure（Such as part registration failure, CS domains registration failure）, or tracking fields TA renewal failures（As part TA update failure, CS domains position area LA update failure) non-access layer information；
(2) wireless heterogeneous networks connection release message is received（Such as RRC_Connection_Release) when.
As shown in figure 4, the embodiment of the present invention eight provides a kind of user equipment (UE), the UE includes：Acquiring unit 801, for obtaining the configured information in target cell list in the system message of all or part of Target cell, the configured information is：Instruction A for indicating the domain that Target cell is supported, either for indicating whether Target cell supports whether the instruction B or instruction Target cell in CS domains only support the instruction C of ps domain;And,
Selecting unit 802, for being selected the configured information in the first object cell into the target cell list, the system message of the first object cell to indicate that the Target cell supports CS domains according to the configured information. Optionally, the configured information in the present embodiment indicates that Target cell supports CS domains to include：Indicate that the domain that A indicates that Target cell is supported is CS domains；Or indicate that B indicates that Target cell supports that the state in CS domains is yes；Indicate that C indicates that Target cell only supports the state of ps domain to be no.
Optionally, the acquiring unit 801 in the present embodiment is additionally operable to obtain target cell list from network entity.
Optionally, the UE in the present embodiment also includes memory cell 803 (not shown in figure）, for storing target cell list, the unit can be also used for being updated the target cell list of storage according to configured information.
Specifically, the selecting unit in the present embodiment selects the first object cell into target cell list to include according to configured information：When acquiring unit 801 gets more than one configured information and indicates that its corresponding Target cell supports CS domains, selecting unit randomly chooses a Target cell and is used as first object cell, or it regard the best Target cell of signal quality as first object cell, or the most forward Target cell that will sort is as first object cell, and select to first object cell；When acquiring unit 801 gets a configured information and indicates that its corresponding Target cell supports CS domains, selecting unit can be using the Target cell as first object cell, and selects to the first object cell；It can also first judge whether to regard Target cell as first object cell, if, then UE is selected to the first object cell, otherwise the instruction letter embodiment of the present invention nine that UE is obtained in target cell list in the system message of other Target cells provides a kind of user equipment (UE), and the UE includes：
Selecting unit, for selecting to first object cell；Wherein, first object cell is one of Target cell in target cell list, and the target cell list is only comprising the Target cell for supporting CS domains；And/or, the frequency of first object cell is one of frequency in target frequency list, and the target frequency list is only comprising the target frequency for supporting CS domains.
Optionally, the UE in the present embodiment includes：Acquiring unit, for obtaining target cell list and/or target frequency list from network entity.
Optionally, the UE in the present embodiment includes：Memory cell, for storing target cell list and/or target frequency list, the unit can be also used for being updated the target cell list of storage and/or target frequency list according to configured information, optionally, the unit is additionally operable to heighten the priority of Target cell/frequency in target cell list/target frequency list.
Specifically, the selecting unit in the present embodiment can be used for：Randomly choose in target cell list A Target cell be used as first object cell, or it regard the best Target cell of signal quality in target cell list as first object cell, or the most forward Target cell that will be sorted in target cell list is as first object cell, and select to first object cell.Optionally, selecting unit can include in selection to first object cell：Whether the frequency for judging the first object cell is one of frequency in target frequency list, if it is, selection is to the first object cell.
Specifically, the selecting unit in the present embodiment can be also used for：The Target cell under a frequency in random selection target frequency list is used as first object cell, or it regard the best Target cell of signal quality under all or part of frequency in target frequency list as first object cell, or using the Target cell sorted in target frequency list under most forward frequency as first object cell, and select to first object cell.Optionally, selecting unit can include in selection to first object cell：Whether be Target cell in target cell list one of, if it is, selection is to the first object cell if judging the first object cell.
The embodiment of the present invention ten provides a kind of user equipment (UE), and the UE includes：
Control unit, during for determining that Target cell meets cell confined condition, cancels cell confined condition；And,
Selecting unit, for selecting to the Target cell.
Optionally, cell confined condition can include：Target cell is located at the limited tracking fields TA or position field LA or RA of roaming;And/or, the PLMN that the Public Land Mobile Network PLMN where Target cell is not registered with it is equivalent.
Optionally, the control unit of the present embodiment is additionally operable to determine to select state from as any cell, either resides in any cell status or does not find the state of suitable cell.
Optionally, the control unit of the present embodiment is additionally operable to determine Target cell.Wherein, the method or above-described embodiment four, five or alternative solution that the unit can be provided using prior art provide the method for the cell that sets the goal really to determine Target cell.
One of ordinary skill in the art will appreciate that realizing that all or part of step in above-described embodiment method can be by program to instruct the hardware of correlation to complete, described program can be stored in a computer read/write memory medium, described storage medium, such as：ROM/RAM, magnetic disc, CD etc..
The embodiment of the present invention is described in detail above, embodiment used herein is set forth to the present invention, the explanation of above example is only intended to the system and method for helping to understand the present invention；Simultaneously for those of ordinary skill in the art, according to the thought of the present invention, specific real Apply and will change in mode and application, in summary, this specification content should not be construed as limiting the invention.

Claims (1)

  1. Claim
    1st, a kind of method for selecting cell, it is characterised in that including：
    User equipment (UE) obtains the configured information in the system message of all or part of Target cell in target cell list, and the configured information is：Instruction A for indicating the domain that the Target cell is supported, either for indicating whether Target cell supports whether the instruction B or instruction Target cell in CS domains only support the instruction C of ps domain;
    The UE selects the configured information in the first object cell into the target cell list, the system message of the first object cell to indicate that the Target cell supports CS domains according to the configured information.
    2nd, according to the method for the claim 1, it is characterised in that the configured information indicates that the Target cell supports CS domains to include following either case：
    The instruction A indicates that the domain that the Target cell is supported is CS domains；
    The instruction B indicates that the Target cell supports that the state in CS domains is yes；
    The instruction C indicates that the Target cell only supports the state of ps domain to be no.
    3rd, according to the method for the claim 1 or 2, it is characterised in that
    The target cell list is what the UE was obtained from network entity, or stored by the UE itself.
    4th, according to the method for the claim 1 or 2, it is characterised in that the UE is obtained after the configured information in target cell list in the system message of all or part of Target cell, in addition to：
    UE is updated according to the configured information to the target cell list.
    5th, according to the method for the claim 1 or 2, it is characterized in that, when the UE gets more than one configured information and indicates that its corresponding Target cell supports CS domains, the UE selects the first object cell into the target cell list to include according to the configured information：
    UE randomly chooses a Target cell as first object cell, either using the best Target cell of signal quality as first object cell or the most forward Target cell that will sort is as first object cell, and selects to first object cell.
    6th, according to the method for the claim 1 or 2, it is characterized in that, when the UE gets a configured information and indicates that its corresponding Target cell supports CS domains, the UE selects the first object cell into the target cell list to include according to the configured information：
    The UE as first object cell, and selects the Target cell small to the first object Area；Or,
    The UE judges whether the Target cell as first object cell, if it is, UE is selected to the first object cell, otherwise UE obtains the configured information in the system message of other Target cells in the target cell list.
    7th, according to the method for the claim 1 or 2, it is characterised in that the UE is obtained before the configured information in target cell list in the system message of all or part of Target cell, in addition to：
    The UE determines that target cell list includes the Target cell for supporting ps domain and the Target cell in support CS domains.
    8th, a kind of method for selecting cell, it is characterised in that including：
    User equipment (UE) is selected to first object cell；Wherein,
    First object cell is one of Target cell in target cell list, and the target cell list is only comprising the Target cell for supporting CS domains；And/or,
    The frequency of first object cell is one of frequency in target frequency list, and the target frequency list is only comprising the target frequency for supporting CS domains.
    9th, according to the method for the claim 8, it is characterised in that
    The target cell list is the target cell list that the UE is obtained from network entity, or by the target cell list of the UE itself storages；And/or,
    The target frequency list is the target frequency list that the UE is obtained from network entity, or by the target frequency list of the UE itself storages.
    10th, according to the method for the claim 9, it is characterised in that
    The target cell list is that the target cell list that the UE is obtained from network entity includes：UE obtains the target cell list by the system message of current service cell；Or, UE supports the target cell list of ps domain to determine the target cell list according to complete object cell list and only；And/or, the target frequency list is that the target frequency list that the UE is obtained from network entity includes：UE obtains the target frequency list by the system message of current service cell；Or, UE is according to complete
    11st, according to the method for any one of the claim 8 to 10, it is characterised in that also include：UE heightens the priority of the Target cell in the target cell list；And/or,
    UE heightens the priority of the frequency in the target frequency list.
    12nd, according to the method for any one of the claim 8 to 10, it is characterised in that the UE selections Include to first object cell：
    A Target cell in UE random selection target cell lists is used as first object cell, or it regard the best Target cell of signal quality in target cell list as first object cell, or the most forward Target cell that will be sorted in target cell list is as first object cell, and select to first object cell.
    13rd, according to the method for the claim 12, it is characterised in that the frequency of the first object cell is one of frequency in target frequency list.
    14th, according to the method for any one of the claim 8 to 10, it is characterised in that the UE selects to first object cell to include：
    The Target cell under a frequency in UE random selection target frequency lists is used as first object cell, or it regard the best Target cell of signal quality under all or part of frequency in target frequency list as first object cell, or using the Target cell sorted in target frequency list under most forward frequency as first object cell, and select to first object cell.
    15th, according to the method for the claim 14, it is characterised in that the first object cell is one of Target cell in target cell list.
    16th, a kind of method for selecting cell, it is characterised in that including：
    When user equipment (UE) determines that Target cell meets cell confined condition, cancel cell confined condition, and select to the Target cell.
    17th, according to the method for the claim 16, it is characterised in that the cell confined condition includes：
    Target cell is located at the limited tracking fields TA or position field LA or RA of roaming;And/or, the PLMN that the Public Land Mobile Network PLMN where Target cell is not registered with it is equivalent.
    18th, according to the method for the claim 16 or 17, it is characterised in that the UE determines that Target cell also includes before meeting cell confined condition：
    UE is determined to select state from as any cell, is either resided in any cell status or do not find the state of suitable cell.
    19th, according to the method for the claim 16 or 17, it is characterised in that before the UE determines that Target cell meets cell confined condition, in addition to：
    The UE determines Target cell.
    20th, a kind of user equipment, it is characterised in that including： Acquiring unit, for obtaining the configured information in target cell list in the system message of all or part of Target cell, the configured information is：Instruction Α for indicating the domain that the Target cell is supported, either for indicating whether the Target cell supports whether the instruction Β or the instruction Target cell in CS domains only support the instruction C of ps domain;And,
    Selecting unit, for being selected the configured information in the first object cell into the target cell list, the system message of the first object cell to indicate that the Target cell supports CS domains according to the configured information.
    21st, a kind of user equipment, it is characterised in that including：
    Selecting unit, for selecting to first object cell；Wherein, the first object cell is one of Target cell in target cell list, and the target cell list is only comprising the Target cell for supporting CS domains；And/or, the frequency of the first object cell is one of frequency in target frequency list, and the target frequency list is only comprising the target frequency for supporting CS domains.
CN2009801236875A 2009-03-17 2009-03-17 Method and device for selecting cell Pending CN102138353A (en)

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