CN103686784A - Cell management method and device of user terminal in idle state in LTE - Google Patents
Cell management method and device of user terminal in idle state in LTE Download PDFInfo
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- CN103686784A CN103686784A CN201210352718.8A CN201210352718A CN103686784A CN 103686784 A CN103686784 A CN 103686784A CN 201210352718 A CN201210352718 A CN 201210352718A CN 103686784 A CN103686784 A CN 103686784A
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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
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Abstract
The invention relates to a cell management method and device of a user terminal in the idle state in a LTE. The method comprises the following steps: a set of cell information is acquired in cell selection or cell reselection; the set of cell information is checked whether one of the set of cell information exists in a banned list, wherein the set of cell information includes one or more cell information of cells to be searched, the banned list is pre-established in the user terminal, and list items of the banned list are used to record the cell information of a banned cell; if the cell information exists in the banned list, then the cell information is removed from the set of cell information, and the check proceeds; and if the cell information does not exist the banned list, then the cell information is sent to the physical layer for searching. According to the invention, the time and energy consumption generated by unnecessary cell search can be avoided, and the system efficiency can be improved.
Description
Technical field
The present invention relates to wireless communication technology, relate in particular to cell management method and the equipment of user terminal under idle state in a kind of LTE.
Background technology
In the Access Layer of LTE agreement, the key activities of IDLE state relates to terminal for the selection of physical area, resident and gravity treatment.The cell type of LTE comprises: acceptable cell, suitable cell, reserved community, banned community, restricted community.
● acceptable cell: only can be resident to obtain restricted service (initiate urgent call and accept ETWS message) by UE.
● suitable cell: can be by UE resident and obtain normal service (make a call and business etc.).Such community must belong to PLMN or the EPLMN of registration, and can not be prohibited, and belongs to legal tracing area, and meets the condition that community is selected.
● reserved community: only have some particular UE can be resident, and cannot be resident for other UE.
● banned community: forbid that UE is resident.
● restricted community: can be resident, but forbid that UE initiates up access.
For terminal, the first thing for air interface during start is exactly to attempt residing in suitable community.Before resident, radio resource control RRC is searched for fixing or unfixed frequency and physical area I D by physical layer by search mechanisms, and to searching for, successful community is measured and read apparatus information.If the result of measurement and read apparatus information meets successfully resident condition, Ze Gai community is carried out resident.On resident basis, terminal can be initiated process and the down-going synchronous of various up accesses and accept new system information and the process of paging.
The criterion that community is selected is called as S criterion.This criterion refers to that the community RSRP value of measuring according to terminal and the system information reading calculate a S value.If the S value of Yi Ge community is greater than 0, represent that terminal can select this community.
The community of start is selected, and has following two kinds of processes:
1. initial cell is selected:
This process does not know that for terminal in RF channel, which is E-UTRA carrier frequency.Terminal need to scan all RF channels according to its ability, to find a suitable cell.Specifically, on each carrier frequency frequency, terminal will be searched for a Ge Qiang community.Once find suitable community, this community will be selected to carry out resident.
2. use the initial cell of storage information to select:
This process need terminal is preserved the even information list of cell parameter of a frequency point information, if terminal can not find suitable cell resident in list, will start " initial cell selection ".
Once cell reselection refers to after the resident success of terminal, can ceaselessly measure the RSRP value of current service cell and adjacent cell.Whether terminal can recalculate RSRP value according to the parameter in cell system information, then by a set of reselection criterion, select will reselect on Xin community.
When end side is carried out Cell searching and gravity treatment, likely in following several situations, there is repeatedly gravity treatment and cause redundancy.
An adjacent cell ranked first under cell reselection criterion, according to this community of gravity treatment brigadier, is judged to be optimum subdistrict, yet this community is a banned community (terminal cannot be learnt this situation before read apparatus information).Therefore, resident Dao Gai community can be searched for always and attempt to cell re-selection mechanism, but cannot resident success.
In adjacent cell, having a plurality of communities is banned communities, and unknown this situation of terminal, terminal repeatedly gravity treatment arrives one of these banned communities, but also cannot resident success.
Serving cell is banned suddenly, by system page notification.But in the situation that terminal does not have checking mechanism, still may gravity treatment arrive banned community, thereby cause the resident and unsuccessful situation of repeatedly gravity treatment.
Time and energy consumption that above-mentioned situation has caused unnecessary Cell searching to produce.
Summary of the invention
The object of this invention is to provide cell management method and the equipment of user terminal under idle state in a kind of LTE that can overcome above-mentioned defect.
In a first aspect of the present invention, the cell management method of user terminal under idle (idle) state in a kind of LTE is provided, comprising: in community selection or cell reselection, obtain one group of cell information; Check whether one of described one group of cell information is present in banned list, wherein, described one group of cell information that cell information comprises one or more communities to be searched, described banned list is to be based upon in advance in user terminal, and the list items of described banned list is for recording the cell information of a banned community; If described cell information is present in described banned list, described cell information is removed from described one group of cell information, proceed described inspection; If described cell information is not present in described banned list, described cell information is sent to physical layer to search for.
In a second aspect of the present invention, the cell management equipment under idle (idle) state of user terminal in a kind of LTE is provided, comprising: for selecting in community or cell reselection obtains the module of one group of cell information; For storing the module of banned list, described banned list is to be based upon in advance in user terminal, and the list items of described banned list is for recording the cell information of a banned community; For checking whether one of described one group of cell information is present in the module of banned list, wherein, described one group of cell information that cell information comprises one or more communities to be searched; If described cell information is present in described banned list, described cell information is removed from described one group of cell information, proceed described inspection; If described cell information is not present in described banned list, described cell information is sent to physical layer to search for.
The present invention by maintaining the list of a banned community in user terminal, banned cell filtering in community to be searched at user terminal in the selection of idle Tai Xiajiang community and cell reselection falls, do not carry out the search of physical layer, time and the energy consumption of having avoided unnecessary Cell searching to produce, improved system effectiveness.
Accompanying drawing explanation
Fig. 1 is according to the community selection of idle state user terminal in the LTE of the embodiment of the present invention and the flow chart of residence reselecting;
Fig. 2 is according to the maintenance strategy schematic diagram of banned list in the community selection of idle state user terminal in the LTE of the embodiment of the present invention and cell reselection;
Fig. 3 is according to the flow chart of the cell selecting method of idle state user terminal in the LTE of the embodiment of the present invention; And
Fig. 4 is according to the flow chart of the residence reselecting of idle state user terminal in the LTE of the embodiment of the present invention.
Embodiment
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Fig. 1 is according to the community selection of idle state user terminal in the LTE of the embodiment of the present invention and the flow chart of residence reselecting.
In step 101, in community selection or cell reselection, obtain one group of cell information.
In step 102, the user terminal of idle state takes out a cell information from its one group of known cell information, in one group of cell information, comprise one or more cell informations, described cell information needs to be sent to physical layer to carry out Cell searching, and described cell information can comprise cell i d and subdistrict frequency point.
In step 103, check whether the cell information taking out is present in banned list, and banned list is to be based upon in advance in user terminal, can be described as CellBarredList[].According to current network state, in system, may there be a plurality of communities banned.Preferably, the size of list can be made as 6, and this is because safeguard at most that in system the information burden of 6 banned communities is smaller during terminal gravity treatment.For each in list, except thering is the cell information of banned community, also maintaining a timer construction.This timer construction can be described as CellBarredTimer, in order to record, finds the banned time of community, and time limit of being lifted a ban in end side of banned community.
If existed, flow process proceeds to step 104, otherwise flow process proceeds to step 105.
In step 104, the cell information of inspection is deleted from described one group of cell information, then flow process is got back to step 102.
In step 105, the cell information being checked through is sent to physical layer to search for.
The resident process in Cell searching and community is well-known to those skilled in the art, for fear of fuzzy the present invention, therefore repeats no more.
Fig. 2 is according to the maintenance strategy schematic diagram of banned list in the community selection of idle state user terminal in the LTE of the embodiment of the present invention and cell reselection.
Below, the maintenance strategy of banned list is elaborated.
In step 201, user terminal is started shooting or is restarted.
In step 201, after user terminal start or restarting, the initialization function of protocol stack RRC carries out initialization setting to banned list, and be about to timer zero clearing its state and be set to close, and the cell information in delete columns list item.
In step 203, in the SIB1 of read system information, whether the function that need to call GC is banned to check community.Below can read system information SIB1 in two kinds of situations.The first, in Cell searching flow process, can read system information SIB1.The second, terminal receives paging when I DLE state, and this paging type is that prompt terminal system information changes, and now also needs read system information SIB1 again.
In step 204, find that current search Dao community, community or current service cell are banned.
In step 206, traversal of lists is searched for, and searching state is the timer of closing.
In step 208, in search procedure, find a timer state for closing.
In step 210, the cell information of banned community is written in this list items, and opens the timer in this, be the lift a ban time limit of the banned community of set timer in end side.The timer opening time is for finding the banned time of community, lifts a ban the time limit can be set to 300 seconds (time span of protocol requirement).In brief, if there is no system information proactive notification lifting a ban in the time limit of timer, can think that community corresponding to this timer is still in banned state.Timer-type can that is to say for disposable timer, over timer after lifting a ban the time limit, automatically closes.
In step 212, when timer expiry is closed automatically, i.e. in the banned banned time limit predetermined over timer of community, end side Jiang Gai community is considered as removing banned.Now, delete in banned list this cell information.
In step 209, in search procedure, find that the timer of all list items in banned list is all in opening.
In step 211, do not store the information of banned community and abandoned.Because say from probability, have that to surpass the banned situation in 6 adjacent cells fewer simultaneously, the cell information that abandons banned community can not have influence on system effectiveness substantially.
In step 205, in read system information SIB1, whether the function that need to call GC is banned to check community.When check result Wei Gai community does not have banned time, by searching for banned list, find that this cell i d and subdistrict frequency point are present in certain state in banned list in open one.
In step 207, delete the information of this banned community and close corresponding timer.
No matter for which kind of reason, the deleted and pent list items of corresponding timer of cell information can be considered available entry,, when having new banned cell information to write banned list, can use this to operate.The actual object of above-mentioned banned list is to tell RRC, and current time which adjacent cell for user terminal is banned, can not be resident.The function of banned list is the idle state for RRC, be to be controlled by network side, and network side can not allow terminal be switched to a banned community because connect the switching of (connected) Tai community.So, only when idle state user terminal carries out community selection and cell reselection, just use this list.In brief, by using this banned list, the banned cell filtering in this list can be fallen, in subsequent step, physical layer need not be searched for this banned community.
Fig. 3 is according to the flow chart of the cell selecting method of idle state user terminal in the LTE of the embodiment of the present invention.
In step 301, after starting up of terminal, at Non-Access Stratum NAS, start shooting and read the process of SIM card.
In step 302, search for and select PLMN.By reading SIM card, if discovery terminal is not preserved prior information, carry out full frequency band search, on each carrier frequency frequency, search for the cell information of Qiang community and reported to NAS layer, by NAS layer, determine that whether proceeding PLMN searches for; If discovery terminal is preserved prior information, NAS layer indication Access Layer AS carries out PLMN search according to the parameter of prior information.Then, according to the Search Results of PLMN, therefrom select high-quality PLMN.
In step 303, NAS sends the Cell searching request of selected PLMN and the cell information of some communities to be searched to RRC.In the situation that terminal is not stored cell information, carry out full frequency band search, on each frequency, search for Qiang community, and the cell information searching is sent to RRC; In the situation that terminal storage has cell information, the cell information of storage is sent to RRC.The one group of cell information that sends to RRC comprises cell i d and subdistrict frequency point, and the cell information of these selections is used for treating physical layer search.
In step 304, RRC takes out the cell information of a community to be searched from the cell information of one group of community to be searched.
In step 305, RRC checks whether the cell information of the community to be searched of taking out is present in banned list.If existed, flow process proceeds to 106; If there is no, flow process proceeds to step 307.
In step 306, the cell information for search cell of taking-up is removed from the cell information of some communities to be searched, and then flow process is got back to step 304.
In step 307, send to physical layer to search for the cell information of community to be searched.
Fig. 4 is according to the flow chart of the residence reselecting of idle state user terminal in the LTE of the embodiment of the present invention.
In step 401, RRC receives the cell measurement results of current persistent district and some adjacent cells from physical layer after gravity treatment triggers.RRC, when gravity treatment triggers, can send the measurement request of Serving cell, and mutual by MC in RRC and physical layer finally receives the measurement result of current persistent district and some adjacent cells from physical layer.
In step 402, according to cell measurement results and system information, community is screened, select the community that meets S criterion.
In step 403, according to the native region priority in system information, the cell measurement results after screening is sorted.
In step 404, in one group of cell information corresponding to measurement result from sequence, take out a cell information.
In step 405, check whether the cell information taking out is present in banned list.If existed, flow process proceeds to step 406, otherwise flow process proceeds to step 407.
In step 406, the cell information of this taking-up is deleted from one group of described cell information, then flow process is got back to step 404.
In step 407, according to the native region priority of the cell information of this taking-up, carry out priority judgement.
In step 408, send to physical layer to search for this cell information and priority court verdict thereof.
Professional should further recognize, unit and the algorithm steps of each example of describing in conjunction with embodiment disclosed herein, can realize with electronic hardware, computer software or the combination of the two, for the interchangeability of hardware and software is clearly described, composition and the step of each example described according to function in the above description in general manner.These functions are carried out with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.Professional and technical personnel can specifically should be used for realizing described function with distinct methods to each, but this realization should not thought and exceeds scope of the present invention.
The software module that the method for describing in conjunction with embodiment disclosed herein or the step of algorithm can use hardware, processor to carry out, or the combination of the two is implemented.Software module can be placed in the storage medium of any other form known in random asccess memory (RAM), internal memory, read-only memory (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field.
Above-described embodiment; object of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the foregoing is only the specific embodiment of the present invention; the protection range being not intended to limit the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (12)
1. the cell management method of user terminal under idle (idle) state in LTE, comprising:
In community selection or cell reselection, obtain one group of cell information;
Check whether one of described one group of cell information is present in banned list, wherein, described one group of cell information that cell information comprises one or more communities to be searched, described banned list is to be based upon in advance in user terminal, and the list items of described banned list is for recording the cell information of a banned community;
If described cell information is present in described banned list, described cell information is removed from described one group of cell information, proceed described inspection;
If described cell information is not present in described banned list, described cell information is sent to physical layer to search for.
2. method according to claim 1, wherein, the list items of described banned list is also for maintaining a timer corresponding with described banned community, and described timer opens and cuts out after lifting a ban the time limit predetermined when user terminal writes described banned list by the cell information of described banned community.
3. method according to claim 2, also comprises:
After user terminal start or restarting, delete the cell information of described banned community and described timer zero clearing its state are set to close.
4. method according to claim 2, also comprises:
By read system information SIB1, find banned community;
Search for described banned list, the state that finds described timer is the list items of closing; And
The state that the cell information of described banned community is write to described timer is the list items of closing.
5. method according to claim 2, also comprises:
When the timer in the list items of described banned list cuts out after being scheduled to lift a ban the time limit, delete the cell information of the banned community in described list items.
6. method according to claim 2, also comprises:
User terminal is found not banned community by read system information SI B1;
Check described banned list, the cell information of banned community is not present in described banned list described in discovery; And
The cell information of banned community by corresponding timer zero clearing and close not described in deleting from described banned list.
7. the cell management equipment of user terminal under idle (idle) state in LTE, comprising:
For selecting in community or cell reselection obtains the module of one group of cell information;
For storing the module of banned list, described banned list is to be based upon in advance in user terminal, and the list items of described banned list is for recording the cell information of a banned community;
For checking whether one of described one group of cell information is present in the module of banned list, wherein, described one group of cell information that cell information comprises one or more communities to be searched;
If described cell information is present in described banned list, described cell information is removed from described one group of cell information, proceed described inspection;
If described cell information is not present in described banned list, described cell information is sent to physical layer to search for.
8. equipment according to claim 7, wherein, describedly also comprises for storing the module of banned list:
Timer module, for maintaining a timer corresponding with described banned community, described timer opens and cuts out after lifting a ban the time limit predetermined when user terminal writes described banned list by the cell information of described banned community.
9. equipment according to claim 8, also comprises:
Banned list initialization module, for after user terminal start or restarting, deletes the cell information of banned community and described timer zero clearing its state is set to close.
10. equipment according to claim 8, also comprises:
For find the module of banned community by read system information SIB1;
Be used for searching for described banned list, the state that finds described timer is the module of the list items of closing; And
It for the state that the cell information of described banned community is write to described timer, is the module of the list items of closing.
11. equipment according to claim 8, also comprise: while closing after being scheduled to lift a ban the time limit for the timer of the list items in described banned list, and the module of deleting the cell information of the banned community in described list items.
12. equipment according to claim 8, also comprise:
For finding the not module of banned community by read system information SIB1;
Be used for checking described banned list, the cell information of banned community is not present in the module in described banned list described in discovery; And
For the cell information of banned community by corresponding timer zero clearing the module of closing not described in deleting from described banned list.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210352718.8A CN103686784B (en) | 2012-09-20 | 2012-09-20 | Cell management method and equipment of the user terminal under idle states in a kind of LTE |
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| CN201210352718.8A CN103686784B (en) | 2012-09-20 | 2012-09-20 | Cell management method and equipment of the user terminal under idle states in a kind of LTE |
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| CN104301991A (en) * | 2014-09-01 | 2015-01-21 | 联想(北京)有限公司 | Information processing method and electronic device |
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| CN109451840A (en) * | 2017-07-14 | 2019-03-08 | 北京小米移动软件有限公司 | District staying method, device and user equipment |
| CN110731090A (en) * | 2019-09-02 | 2020-01-24 | 北京小米移动软件有限公司 | System message processing method and device |
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| CN110731090A (en) * | 2019-09-02 | 2020-01-24 | 北京小米移动软件有限公司 | System message processing method and device |
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| CN115552967A (en) * | 2020-06-01 | 2022-12-30 | Oppo广东移动通信有限公司 | Method of avoiding problem cells and related product |
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| Publication number | Publication date |
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| CN103686784B (en) | 2018-05-11 |
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