CN101990184A - Cell selection or cell reselection method of a terminal - Google Patents
Cell selection or cell reselection method of a terminal Download PDFInfo
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- CN101990184A CN101990184A CN2009102660077A CN200910266007A CN101990184A CN 101990184 A CN101990184 A CN 101990184A CN 2009102660077 A CN2009102660077 A CN 2009102660077A CN 200910266007 A CN200910266007 A CN 200910266007A CN 101990184 A CN101990184 A CN 101990184A
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Abstract
The invention relates to a cell selection or reselection method between wireless access technologies or in the wireless access technology, in particular to a cell selection or cell reselection method of a terminal, wherein the terminal is in a limited service state and supports a circuit switch domain service, and the current cell of the terminal does not support emergency calls. The cell selection or cell reselection method is characterized by comprising the steps of: carrying out cell selection or cell reselection by the terminal to select a wireless access technological cell supporting the circuit switch domain service; carrying out the cell selection or cell reselection once again by the terminal after the cell selection or cell reselection, if a selectable wireless access technological cell is an acceptable cell, judging that the cell, in which the frequency of the acceptable cell is located, has the lowest priority, and if the selectable wireless access technological cell is a proper cell, submitting to the cell broadcast in a system message of a current resident cell and reselecting priority, by the terminal. By adopting the technical scheme of the invention, the ping-pong phenomenon of the terminal between two wireless access technological cells is avoided.
Description
Technical field
The present invention relates to the mobile communication technology field, relate in particular between a kind of wireless access technology or wireless access technology in cell selecting, the method for gravity treatment.
Background technology
Insert (Wideband Code Division Multiple Access in Wideband Code Division Multiple Access (WCDMA), WCDMA) in the system, the preceding urgent call of version 9 (Release 9) in the 3GPP issue is based on circuit domain business (Circuit Switch, abbreviate CS as, also be called for short and make circuit domain) realize.From the version 9 of 3GPP, begin to introduce urgent call based on the packet switch domain business.VoIP (voice over IP) technology has been adopted in this new urgent call or rather, and requires terminal and core net to support IMS (IP multimedia subsystem, IMS, IP Multimedia Subsystem abbreviates IMS as)) business.This new urgent call becomes the IMS urgent call in this article.
Because IMS is in the industrial application that does not obtain maturation, so not all operator all can support the IMS urgent call.Network need notify terminal network whether to support the IMS urgent call by certain mode in the LTE of 3GPP (Long Term Evolution).If terminal can be registered normally or the position is upgraded, network will be by dedicated signaling-generally be position new technological process-notify certain PLMN of terminal whether to support the IMS urgent call more so.But some terminal can't normal registration can't be carried out normal position updating process to network or in certain sub-district, and whether network will support the IMS urgent call by the method informing network of system message so.Under the prerequisite that network is shared, have only the PLMN that broadcasts in the system message all PLMN that tabulates not support under the situation of IMS urgent call, just can illustrate that network do not support the IMS urgent call, otherwise network support IMS urgent call will be described in system message.
Terminal can't be registered or can't carry out the position when upgrading, terminal generally can reside in an acceptable cell (acceptable cell) under idle condition, and can only finish limited service in this state, such as urgent call or accept ETWS or the like.Claim that terminal be in " camp on any cell " (reside in any sub-district) state in the 3GPP standard this time.Do not support the IMS urgent call if be in the terminal discovery current area of " camp on any cell " state, terminal can't obtain most important limited service so.This situation for the terminal of supporting CS voice service (circuit domain speech business) cell selecting or gravity treatment to the wireless access technology of supporting circuit domain business, such as GERAN, UTRAN, CDMA2000 can avoid this problem.Because the urgent call based on circuit domain has obtained ripe application in industrial quarters, terminal generally always can obtain the business of urgent call in the wireless access technology of supporting circuit domain.
But there is contradiction between the trigger mechanism of this new cell selecting or gravity treatment and general cell selecting of measuring based on wireless signal or the gravity treatment rule.When terminal resides in certain sub-district, generally speaking often because the wireless quality of this sub-district is relatively good or the priority ratio of the frequency at place is higher.If because whether support the reason triggering terminal of urgent call to leave the sub-district at place, so very fast terminal can be followed the rule of general cell selecting or gravity treatment and come back to original sub-district, thereby produce ping-pong phenomenon.In order to prevent the generation of this ping-pong phenomenon, need revise the rule of general cell selecting or gravity treatment.
Describe in above-mentioned general cell selecting or gravity treatment rule and the standard each wireless access technology correspondence that is defined in 3GPP of cell reselection priority, especially and " camp on any cell " state corresponding district select and the gravity treatment rule.For E-UTRAN, particular content is described in 36.304 standards, and for GERAN, particular content is described in 45.008, and particular content is described in 25.304 for UTRAN.
Summary of the invention
Technical problem to be solved by this invention is that a kind of terminal cell selecting of limited service state or the method that the sub-district gravity treatment can be supported the sub-district of radio-circuit territory emergence call service are provided.
For solving the problems of the technologies described above, technical solution of the present invention is: a kind of cell selecting of terminal or residence reselecting, described terminal is in limited service state, and described terminal is supported circuit domain business, urgent call is not supported in the current sub-district of described terminal, it is characterized in that: the sub-district of the wireless access technology of described terminal cell selecting or sub-district gravity treatment to a support circuit domain business; After cell selecting or the sub-district gravity treatment, described terminal is carried out cell selecting or sub-district gravity treatment once more, if optionally the sub-district of wireless access technology is an acceptable cell, think that then the cell reselection priority of described acceptable cell place frequency is minimum, if optionally the sub-district of wireless access technology is a suitable cell, then described terminal is obeyed the cell reselection priority of broadcasting in the persistent district system message at that time.
Described limited service state is meant that terminal is in and resides in any cell status, i.e. " camp on anycell " state, described circuit domain business is meant the circuit domain speech business, gravity treatment of described sub-district or cell selecting are to certain sub-district of the wireless access technology of supporting circuit domain business, the urgent call based on circuit domain is supported in described sub-district, and described sub-district is acceptable cell or suitable cell; Described urgent call is meant the IMS urgent call, the wireless access technology of described support circuit domain business is meant GERAN, UTRAN or CDMA2000, when the recovering state of described terminal becomes normal resident state, promptly " camped normally " time, cell selecting afterwards or gravity treatment are obeyed general cell selecting and gravity treatment rule or are obeyed the cell reselection priority of system message broadcasting of institute's persistent district or the dedicated priority that receives from dedicated signaling.
The invention provides another technical scheme is, described terminal is in limited service state, and urgent call is not supported in current sub-district, it is characterized in that: terminal cell selecting or sub-district gravity treatment are supported the acceptable cell of urgent call on the another one frequency of place wireless access technology, and no longer obey the priority of the original frequency of broadcasting in the system message of the described acceptable cell after described cell selecting or the sub-district gravity treatment.
After further described terminal cell selecting or the sub-district gravity treatment, think that the cell reselection priority of original frequency at other acceptable cell places is minimum, the acceptable cell of the support urgent call of described gravity treatment on the another one frequency is the highest sub-district or the best cell of ranking on this frequency.Described limited service state is meant that terminal is in and resides in any cell status, i.e. " camp on any cell " state.
By adopting method of the present invention, for the terminal of supporting the circuit domain speech business, when finding that the IMS urgent call is not supported in current sub-district, can gravity treatment arrive the wireless access technology of supporting circuit domain business, prevent to obtain this most important business under the limited service state, because traditional urgent call based on circuit domain has ripe application in industrial quarters.Terminal is when being in " camp on any cell " state simultaneously, by minimumization processing to the frequency priority of E-UTRAN sub-district, avoid terminal to come back to the acceptable cell of not supporting the IMS urgent call of an E-UTRAN system as far as possible, thereby avoid terminal between the sub-district of two wireless access technologys, ping-pong phenomenon to take place.
Description of drawings
Fig. 1 is the schematic flow sheet of technical solution of the present invention;
Fig. 2 is the wireless access technology sub-district schematic flow sheet for a terminal cell selecting of the present invention or sub-district gravity treatment to a support circuit domain speech business;
Fig. 3 is the acceptable cell of the E-UTRAN at terminal of the present invention place and the overlapping scene graph of covering of the CS RAT sub-district of supporting the circuit domain speech business;
Fig. 4 does not support circuit domain business cell scenario figure of living in for terminal of the present invention;
Fig. 5 can't select owing to little area overlapping is few for terminal of the present invention or CS RAT cell scenario figure is arrived in gravity treatment;
Fig. 6 for terminal of the present invention from E-UTRAN can the acceptance area select or gravity treatment after the acceptable cell of CS RAT, gravity treatment is to the suitable cell scene graph of E-UTRAN again;
Fig. 7 for terminal of the present invention from E-UTRAN can the acceptance area select or gravity treatment after the acceptable cell of CS RAT, gravity treatment is to the suitable cell scene graph of this CS RAT again;
Fig. 8 does not support circuit domain business terminal cell selecting or sub-district gravity treatment scene graph for the present invention;
Fig. 9 does not support the wireless access technology sub-district schematic flow sheet of a circuit domain business terminal cell selecting or sub-district gravity treatment to a support circuit domain speech business for the present invention.
Embodiment
With reference to figure 1, the present invention is in order to prevent ping-pong phenomenon, and terminal cell selecting or gravity treatment think that the priority of frequency of RAT-A is minimum after the sub-district of the wireless access technology of supporting circuit domain business.It is just effective when this lowest priority has only acceptable cell gravity treatment from CS RAT to RAT-A, obey " camp on any cell " state cell reselection rules down the general CS RAT when that is to say for gravity treatment between the suitable cell of the acceptable cell of CS RAT and RAT-A, wherein the priority of sub-district gravity treatment is obeyed the cell reselection priority of the RAT-A that the cell system message of CS RAT broadcasts.When terminal is left " camp on any cell " state, when perhaps exactly getting back to " camped normally " (normally resident) state, this terminal thinks that no longer the priority of frequency of RAT-A is minimum, thereby recovers that normal cell is selected, the process of gravity treatment.It is to be noted that foregoing circuit territory business mainly is meant the circuit domain speech business.Above-mentioned urgent call mainly is meant the IMS urgent call.
If terminal is not supported circuit domain business, perhaps terminal can't cell selecting or gravity treatment to the sub-district of the wireless access technology of supporting circuit domain business, general sub-district gravity treatment and selective rule under " camp onany cell " state obeyed among the RAT-A in the sub-district gravity treatment of terminal so, wherein cell reselection priority is obeyed each RAT of current area system message broadcasting, comprises the priority of CS RAT.
The mode of above-mentioned getting back to " camped normally " state is meant that terminal allows a cell selecting or gravity treatment to a later state of " suitablecell " (suitable cell) in the resident wireless access technology at RAT-A or CS RAT or other-end.
Traditional urgent call based on circuit domain is supported in the sub-district of the CS RAT of above-mentioned terminal cell selecting or gravity treatment.
In addition, according to another technical scheme of the present invention, terminal can also be selected or the acceptable cell of urgent call is supported in gravity treatment on the another one frequency of place wireless access technology, and no longer obey the priority of the original frequency of broadcasting in the system message of the described acceptable cell after described cell selecting or the sub-district gravity treatment, avoid gravity treatment to return the acceptable cell of not supporting urgent call on the original frequency layer.
Below also the present invention is described in detail in conjunction with the accompanying drawings for five embodiment, in the hope of setting forth technical spirit of the present invention, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, and be not used in qualification the present invention.
At present in the standard that 3GPP formulates only the E-UTRAN based on the LTE technology support the IMS urgent call.So being in the terminal of " camp on any cell " state in an embodiment resides among the acceptable cell of an E-UTRAN.And supporting the wireless access technology of circuit voice business generally to be meant GERAN, UTRAN or CDMA2000 are called for short CS RAT in the following embodiments.Wherein the definition of " campon any cell " state and acceptable cell meets the definition of the 3GPP standard of each wireless access respectively.
Embodiment one: referring to figs. 2 and 3
Be among the acceptable cell of a resident E-UTRAN of the terminal of " camp on any cell ".Terminal knows that by the system message of obtaining the sub-district current sub-district do not support the IMS urgent call, so this terminal can't obtain the business of urgent call in current area.And this terminal itself is supported the speech business of circuit domain, and the network overlapped covering of the wireless access technology of current E-UTRAN sub-district and support circuit domain, so terminal cell selecting or gravity treatment are to CS RAT.After finishing cell selecting or gravity treatment, if terminal also keeps the state of " camp on any cell " in the sub-district of CS RAT, and when the acceptable cell of an E-UTRAN is returned in the trial gravity treatment, think that the cell reselection priority of frequency at this acceptable cell place is minimum, be lower than the cell reselection priority (0～7) of regulation and stipulation.
Embodiment two: with reference to figure 4
The application scenarios of embodiment two and embodiment one is the same, and except a bit, promptly terminal is not supported the speech business of circuit domain.In this case, this terminal selects to obey sub-district cell selecting or the gravity treatment rule under general " camp on any cell " state, and promptly terminal can the behavior of triggering cell cell selecting or gravity treatment because this sub-district does not support the IMS urgent call.
Embodiment three: with reference to figure 5
Be in an embodiment among the acceptable cell of a resident E-UTRAN of the terminal of " camp on any cell ".Terminal knows that by the system message of obtaining the sub-district current sub-district do not support the IMS urgent call, so this terminal can't obtain the business of urgent call in current area.Though this terminal itself is supported the speech business of circuit domain, but because and the signal of the CS RAT sub-district of the overlapping covering of this E-UTRAN sub-district too a little less than, can't satisfy the condition of the relevant acceptable that defines in the standard of this CS RAT correspondence, so this terminal not cell selecting or gravity treatment promptly continues to reside in the current area of E-UTRAN to the sub-district of this CS RAT.
Embodiment four: with reference to figure 6
Similar and embodiment one are among the acceptable cell (cell A) of a resident E-UTRAN of the terminal of " camp on any cell ".Terminal knows that by the system message of obtaining the sub-district current sub-district do not support the IMS urgent call, so this terminal can't obtain the business of urgent call in current area.And this terminal itself is supported the speech business of circuit domain, and the network overlapped covering of the wireless access technology of current E-UTRAN sub-district and support circuit domain, so terminal cell selecting or gravity treatment are to CS RAT cell B.Terminal also keeps the state of " camp on anycell " in the sub-district of CS RAT cell B after finishing cell selecting or gravity treatment.Then this terminal measures the cell C of an E-UTRAN.Cell C is a suitable cell for this terminal, so this terminal does not think that the cell reselection priority of frequency of E-UTRAN at cell C place is minimum, but follows the cell reselection priority of broadcasting in the system message of sub-district B.The terminal gravity treatment enters into " camped normally " state later on to cell C.
Embodiment five: with reference to figure 7
Similar and embodiment one are among the acceptable cell (cell A) of a resident E-UTRAN of the terminal of " camp on any cell ".Terminal knows that by the system message of obtaining the sub-district current sub-district do not support the IMS urgent call, so this terminal can't obtain the business of urgent call in current area.And this terminal itself is supported the speech business of circuit domain, and the network overlapped covering of the wireless access technology of current E-UTRAN sub-district and support circuit domain, so terminal cell selecting or gravity treatment are to CS RAT cell B.Terminal also keeps the state of " camp on anycell " in the sub-district of CS RAT cell B after finishing cell selecting or gravity treatment.Follow the cell C of this terminal measurement and gravity treatment to this CS RAT.Cell C is a suitable cell for this terminal, and all terminal gravity treatments enter into " campednormally " state later on to cell C.At this moment the cell reselection priority of all frequencies of E-UTRAN is obeyed the cell reselection priority of the special use of the priority of system message broadcasting among the cell C or recovery, if this dedicated priority is also effective.
Embodiment six: with reference to figure 8 and Fig. 9
The frequency that is in a resident E-UTRAN of the terminal of " camp on any cell " is among the acceptable cell (sub-district A) of F1.Terminal knows that by the system message of obtaining the sub-district current sub-district do not support urgent call, so this terminal can't obtain the business of urgent call in current area.Gravity treatment of terminal sub-district or cell selecting go up the acceptable cell B that supports urgent call to another one frequency F2, and sub-district B is that F2 goes up the highest sub-district or the best cell of ranking, to avoid gravity treatment in the occurrence frequency on F2 once more.Ranking rule between the sub-district satisfies the regulation of present 3GPP agreement mainly based on the measurement of terminal to each district wireless signals.Should avoid gravity treatment to return the acceptable cell of not supporting urgent call on the F1 for fear of the ping-pong phenomenon terminal, comprise sub-district A.Should ignore the information of the priority of the relevant frequency F1 that broadcasts in the system message of sub-district B in order to reach this purpose terminal, think that perhaps the priority of F1 is minimum.
Claims (15)
1. the cell selecting of a terminal or residence reselecting, described terminal is in limited service state, and support circuit domain business, urgent call is not supported in the current sub-district of described terminal, it is characterized in that: the sub-district of the wireless access technology of described terminal cell selecting or sub-district gravity treatment to a support circuit domain business; After cell selecting or the sub-district gravity treatment, described terminal is carried out cell selecting or sub-district gravity treatment once more, if optionally the sub-district of wireless access technology is an acceptable cell, think that then the cell reselection priority of described acceptable cell place frequency is minimum, if optionally the sub-district of wireless access technology is a suitable cell, then described terminal is obeyed the cell reselection priority of broadcasting in the persistent district system message at that time.
2. method according to claim 1 is characterized in that, described limited service state is meant that terminal is in and resides in any cell status, i.e. " camp on any cell " state.
3. method according to claim 1 is characterized in that described circuit domain business is meant the circuit domain speech business.
4. method according to claim 1, it is characterized in that, described cell selecting or sub-district gravity treatment are to certain sub-district of the wireless access technology of supporting circuit domain business, and the urgent call based on circuit domain is supported in described sub-district, and described sub-district is acceptable cell or suitable cell.
5. according to claim 1 or 4 described methods, it is characterized in that described urgent call is meant the IMS urgent call.
6. method according to claim 1 is characterized in that the wireless access technology of described support circuit domain business is meant GERAN, UTRAN or CDMA2000.
7. method according to claim 1 is characterized in that, when the recovering state of described terminal becomes normal resident state, promptly " camped normally " time, general cell selecting and gravity treatment rule are obeyed in cell selecting afterwards or sub-district gravity treatment.
8. method according to claim 1, it is characterized in that, when the recovering state of described terminal becomes normal resident state, promptly " camped normally " time, cell selecting or cell reselection priority are obeyed the cell reselection priority of system message broadcasting of institute's persistent district or the dedicated priority that receives from dedicated signaling afterwards.
9. the cell selecting of a terminal or residence reselecting, described terminal is in limited service state, and urgent call is not supported in current sub-district, it is characterized in that: terminal cell selecting or sub-district gravity treatment are supported the acceptable cell of urgent call on the another one frequency of place wireless access technology, and no longer obey the priority of the original frequency of broadcasting in the system message of the described acceptable cell after described cell selecting or the sub-district gravity treatment.
10. method according to claim 10 is characterized in that, after described terminal cell selecting or the sub-district gravity treatment, thinks that the cell reselection priority of original frequency at other acceptable cell places is minimum.
11. method according to claim 10 is characterized in that, the acceptable cell of the support urgent call of described gravity treatment on the another one frequency is the highest sub-district or the best cell of ranking on this frequency.
12. method according to claim 10 is characterized in that, described limited service state is meant that terminal is in and resides in any cell status, i.e. " camp on any cell " state.
13. method according to claim 10 is characterized in that, described urgent call is meant the IMS urgent call.
14. method according to claim 10 is characterized in that, when the recovering state of described terminal becomes normal resident state, promptly " camped normally " time, general cell selecting and gravity treatment rule are obeyed in cell selecting afterwards or sub-district gravity treatment.
15. method according to claim 10, it is characterized in that, when the recovering state of described terminal becomes normal resident state, promptly " camped normally " time, cell selecting or cell reselection priority are obeyed the cell reselection priority of system message broadcasting of institute's persistent district or the dedicated priority that receives from dedicated signaling afterwards.
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| CN200910266007.7A CN101990184B (en) | 2009-08-06 | 2009-12-28 | Cell selection or cell reselection method of a terminal |
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| CN200910266007.7A CN101990184B (en) | 2009-08-06 | 2009-12-28 | Cell selection or cell reselection method of a terminal |
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| CN103597878A (en) * | 2011-04-11 | 2014-02-19 | 三星电子株式会社 | Method and apparatus for effectively controlling cell reselection priority of user equipment in CSG cell |
| WO2016183822A1 (en) * | 2015-05-20 | 2016-11-24 | 华为技术有限公司 | Cell selection method and device |
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| CN108924891B (en) * | 2018-08-20 | 2021-01-08 | 奇酷互联网络科技（深圳）有限公司 | Cell determination method, user equipment and device with storage function |
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