CN1642300A - Priority selection method of mobile station system - Google Patents
Priority selection method of mobile station system Download PDFInfo
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- CN1642300A CN1642300A CN 200410000986 CN200410000986A CN1642300A CN 1642300 A CN1642300 A CN 1642300A CN 200410000986 CN200410000986 CN 200410000986 CN 200410000986 A CN200410000986 A CN 200410000986A CN 1642300 A CN1642300 A CN 1642300A
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- travelling carriage
- preferred frequency
- preferred
- frequency
- frequency point
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Abstract
The invention relates to a mobile station system preferred selecting method for CDMA2000 system, and its characteristic: arranging some frequency point in mobile station as preferred frequency point; as selecting system, the mobile selects a preferred frequency point as working frequency point if the preferred frequency point exists and otherwise adopts existing custom system selecting procedure. As being idle, the mobile station searches preferred frequency point signal: if this signal exists, switches to this preferred frequency point and otherwise maintains original working frequency point. The invention arranges preferred frequency point on mobile station to implement the solution of mobile station preferred accessing to preferred system and periodically self-searching preferred frequency point in an idle state.
Description
Technical field
The present invention relates to the communications field, relate in particular in a kind of CDMA2000 system mobile station system priority selection method.
Background technology
At present, in the CMDA2000 system, except that the self-defined system selection course of travelling carriage by the frequency point information decision that is provided with in the travelling carriage, travelling carriage and system at which frequency communicate, the Other Frequency Search of travelling carriage and switching etc. all are to carry out according to the Overhead Message that network side issues.Determine by network side as: travelling carriage idle condition Other Frequency Search target, obtain the alien frequencies neighboring BS information in the Overhead Message that travelling carriage must be issued by network side after, could the removal search specified frequency.
Yet number of C DMA networks such as army's net have proposed the specific (special) requirements of oneself.It adopts independent working frequency range, uses some particular services, and with the public network intercommunication.Requirement is in the zone that army's net does not cover, and army's travelling carriage need be gone up public network; In the zone of army's net and the overlapping covering of public network, army's travelling carriage is will the army of remaining on online; Public's travelling carriage is not gone up army's net.Therefore, wish army's travelling carriage when system's selection course, the preferential army's of selection net, and when army's net available signal occurring, army's travelling carriage can switch to army's net from public network very soon.
Along with the extensive use of CDMA2000 system, engender a plurality of carrier networks and the situation of depositing simultaneously, above-mentioned demand of wishing that travelling carriage preferentially remains on the home network also can get more and more.
At present, have following technical scheme to address the above problem in the prior art:
1, self-defined system selection course:
The frequency point information that can be provided with in the travelling carriage has Primary and Secondary frequency (respectively being divided into A of system and the B of system, totally 4 frequencies) at present, is used for the cdma system frequency that determines that self-defined system selection course inserts.In this process, travelling carriage is at first determined selective system A or the B of system, catches and insert cdma network on Primary that attempts respectively in selected system then or the Secondary frequency.
2, the idle condition alien frequencies switches
At present, in case travelling carriage at the idle condition monitoring seek channel, its can be on current CDMA frequency the continuous the strongest pilot signal of search, also can search for the pilot signal of other frequency or frequency range simultaneously.
When the operating frequency of certain adjacent sub-district and the current frequency of travelling carriage not simultaneously, in general Neighboring Cell List message that system issues or expansion Neighboring Cell List message, can comprise the frequency information of this neighbour sub-district.After the travelling carriage reception information, can removal search should the appointment of neighbour sub-district the CDMA frequency.When all pilot signal strengths of current frequency in travelling carriage Active Set and the Neighbor Set all are lower than the Ec/Io threshold value that can establish, the idle switching of alien frequencies will take place in travelling carriage.
The alien frequencies free time, travelling carriage was provided with travelling carriage self parameter according to the CDMA frequency and the CDMA Channel Number (NGHBR_BAND, NGHBR_FREQ) of the Neighbor List Message middle finger provisioning request travelling carriage search that receives when switching.It is NGHBR_BAND that travelling carriage is put CDMABANDS, put CDMACHS is NGHBR_FREQ, be tuned on the new CDMA Channel, begin to monitor the paging channel of this neighbour sub-district, finish that alien frequencies is idle to be switched.
Prior art does not fit into the demand for development of cdma network.The Israeli troops net is an example, shows:
1, in system's selection course of travelling carriage, preferred search frequency can not be set flexibly.Can not satisfy the requirement that army's mobile platform started will preferentially go up army's net, just go up public network when only having or not army's net.
2, the search of the idle alien frequencies switching of travelling carriage is determined by the message that network side issues.Will the army of configuration on the public network base station information of net, it is online to allow army's travelling carriage on public network switch to army.Can not satisfy army and wish that army's net is transparent demand to public network.
3, the message that issues of network side is at all travelling carriages in the network.Even public network has disposed army's net base station information, so not only other public's travelling carriage of army's travelling carriage is also all can the army of switching to online.Cause unnecessary burden between two networks, can not making a phone call of public network user also may occur, influence the network image of public network.
Summary of the invention
The objective of the invention is to solve prior art and be difficult to satisfy the problem of some networks that specific (special) requirements is arranged the new demand of travelling carriage.Hope makes travelling carriage can realize the preferential selection of system by the scheme of preferred frequency is set in travelling carriage, and realizes independently determining preferred Other Frequency Search of idle state period and switching by travelling carriage, further improves the function of cdma network.
For this reason, the present invention adopts following technical scheme:
A kind of mobile station system priority selection method is characterized in that:
The preferred frequency of travelling carriage inside is set;
When travelling carriage carried out system's selection, if this preferred frequency signal exists, then selected this frequency if this preferred frequency signal does not exist, then adopted existing self-defined system selection course as working frequency points.
The setting of described preferred frequency is newly-increased variable in travelling carriage, identifies this preferred frequency.
A kind of mobile station system priority selection method is characterized in that:
The preferred frequency of travelling carriage inside is set;
When the travelling carriage idle condition, travelling carriage is searched for preferred frequency signal, if there is preferred frequency signal, then travelling carriage is switched on this preferred frequency, and if there is no preferred frequency then keeps original working frequency points.
The setting of described preferred frequency is newly-increased variable in travelling carriage, identifies this preferred frequency.
The preferred frequency signal of described existence is meant that the field intensity of preferred frequency is higher than threshold value.
Described threshold value can adopt the setting of one of following method:
With threshold settings is definite value;
The variable that the travelling carriage increase can be provided with is provided with by the user.
Described travelling carriage is to search for preferred frequency periodically.
Described method, the variable in the sign search cycle that the travelling carriage increase can be provided with is provided with the cycle that idle condition is searched for preferred frequency by the user.
Described method, also being included in travelling carriage increases timer, with the control search cycle.
Described method comprises that also one of increase is used to control travelling carriage and whether carries out the preferred frequency selection of idle condition parameter, and the content that this parameter is set is that travelling carriage starts or do not start the preferred frequency search of idle condition.
Owing to adopted technical scheme of the present invention, the technology that preferred frequency is realized optimum system choosing and the autonomous preferred Other Frequency Search of Idle state travelling carriage is set, the active demand that can solve ad hoc network at present, the perfect function of cdma system on travelling carriage.Along with a plurality of operators cdma network and deposit the appearance of situation, the preferred frequency point setting of travelling carriage can make travelling carriage preferentially remain on the network of ownership, drops to the loss of running off of operator's telephone expenses minimum.
Description of drawings
Fig. 1 is the preferential selection course flow chart of system of the present invention;
Fig. 2 is the flow chart of idle state period Other Frequency Search method of the present invention;
Fig. 3 is another flow chart of idle state period Other Frequency Search method of the present invention.
Embodiment
Below in conjunction with Figure of description the specific embodiment of the present invention is described.
The system of travelling carriage is preferentially selected:
The parameter that the present invention still uses Primary (system A), Secondary (system A), Primary (system B), Secondary (system B) frequency of present travelling carriage inside to search for frequency as the self-defined system of travelling carriage selection course.Newly-increased variable is used for one of above-mentioned four frequencies are made as preferred frequency in travelling carriage.Specifically can be in the following way:
One one byte variable of redetermination PRIORITY
S, be defined as follows:
High Low
| Reverse | 1 | 0 | 0 | 0 |
Frequency is searched in the 4th to the 1st bit difference corresponding above-mentioned Primary (system A), Secondary (system A), four starts of Primary (system B), Secondary (system B), when certain bit position is that 1 this frequency of expression is preferred frequency.As shown above, then Primary (system A) frequency is set as preferred frequency.But it is 1 that a bit can only be arranged, and a preferred frequency promptly can only be arranged.
When travelling carriage is provided with preferred frequency and be in self-defined system selection mode, this preferred frequency signal of travelling carriage first search.Behind the preferred frequency Signal Fail of travelling carriage code acquisition, travelling carriage uses existing searching method to continue to select and connecting system.As shown in Figure 1, be the preferential schematic flow sheet of selecting of system of the present invention, as can be seen from the figure, preferentially checked preferential frequency in the flow process.
2, the autonomous Other Frequency Search of travelling carriage idle state period
This travelling carriage has been provided with preferred frequency, and method is with top unanimity, and when idle condition, travelling carriage is periodically searched for preferred frequency.When the received field strength Rx of preferred frequency was higher than a thresholding, no matter how many pilot signal strengths of current Active Set and Neighbor Set was, travelling carriage all switches on the new frequency.Concrete grammar can be as follows:
1) threshold value
Method one: threshold value is made as definite value, as-95dBm.
Method two: the variable PIOR_THRESH that the travelling carriage increase can be provided with
S, provide the network operator to be provided with flexibly.
The threshold value that can be provided with is flexibly used in suggestion.
2) search cycle
The variable PERIOD that can be provided with in the travelling carriage increase
SAnd timer Tx, provide the network operator that the time that idle condition is searched for preferred frequency is set flexibly.Timer Tx uses PERIOD
SValue is carried out timing.
3) Sou Suo condition
Method one: when timer Tx expires, judge whether preferred frequency is identical with the frequency of the current use of travelling carriage, promptly with travelling carriage parameters C DMACH
SWhether identical.As preferred frequency and CDMACH
SNot simultaneously, travelling carriage does not begin to search for preferred frequency.Preferred frequency and CDMACH
SWhen identical, travelling carriage is not searched for preferred frequency.As shown in Figure 2, be the present invention by search cycle variable and timer are set, come the schematic diagram of control cycle search.
Method one does not relate to the change of message.
Method two: sharp reserved field in message body structure now increases by one and is used to control travelling carriage and whether carries out the preferred frequency selection of idle condition parameter PIOR_SEARCH_INCL.Choose a value among the PARAMETER_ID in 32768 to 65535 intervals that can be in STPM message, when this value is 1, then travelling carriage does not start the preferred frequency search of idle condition, and when this value is 0, travelling carriage starts the preferred frequency search of idle condition.Or utilize message such as the NLM control of variable length whether to search for.As shown in Figure 3, be the schematic flow sheet that increases after the parameter.
The present invention is by being provided with preferred frequency on travelling carriage, realized that travelling carriage preferentially inserts optimum decision system and travelling carriage in the scheme of idle state period from the preferred frequency of main search.
Preferred frequency is set on travelling carriage realizes the technology of optimum system choosing and the autonomous Other Frequency Search of Idle state travelling carriage, can solve active demand at present, the perfect function of cdma system as army's ad hoc network such as net grade.In the near future, along with a plurality of operators cdma network and deposit the appearance of situation, the preferred frequency point setting of travelling carriage can make travelling carriage preferentially remain on the network of ownership, drops to the loss of running off of operator's telephone expenses minimum.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claims.
Claims (10)
1, a kind of mobile station system priority selection method is characterized in that:
The preferred frequency of travelling carriage inside is set;
When travelling carriage carried out system's selection, if this preferred frequency signal exists, then selected this frequency if this preferred frequency signal does not exist, then adopted existing self-defined system selection course as working frequency points.
2, the method for claim 1 is characterized in that the setting of described preferred frequency, is newly-increased variable in travelling carriage, identifies this preferred frequency.
3, a kind of mobile station system priority selection method is characterized in that:
The preferred frequency of travelling carriage inside is set;
When the travelling carriage idle condition, travelling carriage is searched for preferred frequency signal, if there is preferred frequency signal, then travelling carriage is switched on this preferred frequency, and if there is no preferred frequency then keeps original working frequency points.
4, method as claimed in claim 3 is characterized in that the setting of described preferred frequency, is newly-increased variable in travelling carriage, identifies this preferred frequency.
5, method as claimed in claim 4 is characterized in that the preferred frequency signal of described existence, is meant that the field intensity of preferred frequency is higher than threshold value.
6, method as claimed in claim 5 is characterized in that described threshold value can adopt the setting of one of following method:
With threshold settings is definite value;
The variable that the travelling carriage increase can be provided with is provided with by the user.
7, method as claimed in claim 3 is characterized in that described travelling carriage is to search for preferred frequency periodically.
8, method as claimed in claim 7 is characterized in that the variable of sign search cycle that can be provided with in the travelling carriage increase by the user being set the cycle that idle condition is searched for preferred frequency.
9, method as claimed in claim 7, it is characterized in that also being included in travelling carriage increases timer, with the control search cycle.
10, method as claimed in claim 3 is characterized in that also comprising that one of increase is used to control travelling carriage and whether carries out the preferred frequency selection of idle condition parameter, and the content that this parameter is set is that travelling carriage starts or do not start the preferred frequency search of idle condition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100009869A CN100502592C (en) | 2004-01-17 | 2004-01-17 | Priority selection method of mobile station system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100009869A CN100502592C (en) | 2004-01-17 | 2004-01-17 | Priority selection method of mobile station system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1642300A true CN1642300A (en) | 2005-07-20 |
| CN100502592C CN100502592C (en) | 2009-06-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100009869A Expired - Fee Related CN100502592C (en) | 2004-01-17 | 2004-01-17 | Priority selection method of mobile station system |
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| Country | Link |
|---|---|
| CN (1) | CN100502592C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104333895A (en) * | 2009-05-28 | 2015-02-04 | 高通股份有限公司 | Reducing frequent handoffs of a wireless communication device |
-
2004
- 2004-01-17 CN CNB2004100009869A patent/CN100502592C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104333895A (en) * | 2009-05-28 | 2015-02-04 | 高通股份有限公司 | Reducing frequent handoffs of a wireless communication device |
| CN104333895B (en) * | 2009-05-28 | 2018-05-08 | 高通股份有限公司 | Reduce frequent switching method, wireless device and the computer-readable medium of wireless telecom equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100502592C (en) | 2009-06-17 |
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