CN1628482A - Method and apparatus for efficient selection and acquisition of a wireless communications system - Google Patents
Method and apparatus for efficient selection and acquisition of a wireless communications system Download PDFInfo
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- CN1628482A CN1628482A CN 03803320 CN03803320A CN1628482A CN 1628482 A CN1628482 A CN 1628482A CN 03803320 CN03803320 CN 03803320 CN 03803320 A CN03803320 A CN 03803320A CN 1628482 A CN1628482 A CN 1628482A
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Abstract
A mobile station includes processing circuitry and a memory. A group of wireless communications systems is selected in accordance with a predetermined system acquisition procedure. A received signal corresponding to each selected system is analyzed to determine a likelihood that the selected system would be acquired by the mobile station. The group of selected systems is reprioritized based on the results of the analysis to produce a more efficient system acquisition sequence. The mobile station then attempts to acquire a selected wireless communications system in accordance with the system acquisition sequence.
Description
Technical field
Present invention relates in general to radio communication, specifically relate to a kind of method and apparatus that is used for effectively selecting and obtaining wireless communication system.
Background technology
The application requires the U.S. Provisional Application No.60/355 of submission on February 5th, 2002,742 priority.
Mobile device usually can insert more than one wireless communication system in the region in its place.The quality of wireless services that mobile device can be used can be understood variant between system and system mutually, this depends on distance, the physical barrier such as building and hills between characteristic, mobile device and the home base stations of the employed instrument of each system, mobile device, and the communications traffic capacity of each system.Local radio communication system can also be supported different multi-address radio communication agreements, such as: code division multiple access (CDMA), wideband CDMA (WCDMA), Advanced Mobile Phone Service (AMPS), global system for mobile communications (GSM), GPRS (GPRS) or high data rate (HDR) technology (for example 1xEV technology).In addition, the difference of the expense that mobile device user is collected depend on moment in one day, with duration that is communicated with of wireless communication system, and whether mobile device is listed in the user of wireless communication system.
In order to select desirable wireless communication system, conventional mobile device is stored the data of describing known system in an optimum roaming list (PRL).PRL generally includes the storage of system and one and catches storage, system is stored as each known wireless communication system storage system identifier (SID) and network identifier (NID), and the parameter of catching of catching the known wireless communication system of storage comprises frequency band, frequency and pattern.In system storage, wireless communication system is usually by the geographic area grouping, and sorts to idealized system least from the most desirable in each zone.Idealized system in a specific geographical area is custom system normally, but also can be to provide a roaming system low-cost, the high-quality service good combination to mobile device.Roaming system provides wireless service than the high a lot of expense of booking service to non-user's mobile device with one usually, but during geographic area outside mobile device enters the booking service coverage of mobile device, when booking service is blocked or be unavailable, but perhaps when booking service may be desirable only at a unacceptable rudimentary quality time spent roaming system.
During the mobile power supply equipment sequence, attempt obtaining and to register mobile device available optimal wireless communication system in its current geographic area.In a method, its current geographic area of mobile device identification, idealized system from the geographic area of being discerned is progressively checked inlet in system's table to the least idealized system in the geographic area of being discerned then, till a system acquisition and registration trial and success.Mobile device also can attempt obtaining and registering a new wireless communication system during operation.For example, the connection between mobile device and current wireless communication system may be lost, and mobile device need be caught a new system.For example, when the connection between mobile device and current wireless communication system may be lost, mobile device need be caught a new system.In addition, the wireless communication system that can use of mobile device may be along with the change of the position of mobile device and surrounding environment thereof and is changed.For the best of breed of high quality and low cost is provided to mobile device user, many mobile devices periodically attempt obtaining and registering a better wireless communication system of current wireless communication system that uses than mobile device.Mobile device is searched for system's table of the wireless communication system more better than the current system of mobile device use in its geographic area, if and in system's table, found better system, then mobile device would leave switching current communication channel and attempts obtaining and registering one of better system.
Before single successful system acquisition and registration, a system acquisition sequence such as the said system acquisition sequence can comprise a series of failure trial of obtaining signal and registering the respective wireless communication system usually.An optimum roaming list generally includes and surpasses 50 systems, and under certain conditions, mobile device may be spent before one is caught trial and success and surpass the system of progressively checking in the optimum roaming list in 60 seconds.It is common that the catching of these failures attempted, and may be caused by various factors.For example, if pilot signal is blocked by physical barrier or weakened, if perhaps mobile device is in the base station overlay area outside, then mobile device possibly can't detect a pilot signal of launching from system base-station.If mobile device and system use inconsistent protocol revision and hardware,, then may fail to the registration of this system if perhaps the registration of system's refusal mobile device is attempted.
Given this, need a kind of method and apparatus that is used for effectively selecting and obtaining wireless communication system in the art.
Summary of the invention
The present invention is the method and apparatus that is used for effectively selecting and obtaining a wireless communication system.In a preferred embodiment, a mobile radio station is selected one group of wireless communication system according to a definite system acquisition procedure.The set of systems of selection has a priority, and for example the preference order of being determined by wireless service provider promptly can and be registered at system acquisition and being moved the station use between trial period.Next, the corresponding received signal of each selecting system is analyzed so that determine that each corresponding system can be moved the possibility that the station obtains.Based on analysis result the wireless communication system group is rearranged order of priority then, so that produce more efficient system acquisition order.Mobile radio station attempts obtaining and being registered in one of system in the wireless communication system group that rearranges order of priority according to the order of catching of described group of regulation.
Preferably, mobile radio station comprises treatment circuit, memory, communication transceiver and antenna.Treatment circuit comprises the processor controls, signal processor, searcher and the system's determining unit that are used to control the mobile radio station operation.In a preferred embodiment, mobile radio station is a multi-mode equipment, and treatment circuit is adapted to operate in CDMA or the AMPS pattern.Preferably, memory comprises volatibility and the nonvolatile RAM of storing optimum roaming list, and described optimum roaming list comprises that system's table and one catch table, and the one or more question blanks such as candidate list.System's determining unit is suitable for selecting one or more wireless communication systems according to system acquisition procedure from system's table.In a preferred embodiment, system's determining unit is stored the system of selecting in candidate list, and the directs searcher analysis is corresponding to the received signal of each system in the candidate list.For each system that lists, searcher order transceiver switches to the respective channel of this system, and a received signal is analyzed.Analysis to received signal can comprise: the received signal intensity (Rx) of measuring each system, measure signal to noise ratio Ec/Io, if perhaps in other test of determining whether candidate system may be acquired---this test required time is attempted lacking than complete system acquisition and registration.
After each system is analyzed, selecteed set of systems is rearranged order of priority based on analysis result.In a preferred embodiment, all systems all so ordering so that to have those systems of the maximum likelihood that is acquired at first selected.In first alternative embodiment, order of desirability is held, and in each level of desirability, the operational analysis result comes the system of sequencing selection.In second alternative embodiment, the set of systems of selecting based on the expecting degree information sorting that analyzes the result to adjust the expecting degree information of the system of each selection, used then to adjust.In the 3rd alternative embodiment, deletion corresponding analysis result is lower than each system of threshold value from the set of systems of selecting.
Next mobile radio station attempts obtaining and registering a wireless communication system.At first from the candidate list of rearranging order of priority, select to have other system of maximum priority level, and attempt obtaining and registering the system of selection.Can use any system acquisition method that comprises the legacy system catching method of knowing in this area.Attempt not success if catch/register, from candidate list, select to have the wireless communication system of inferior highest priority so, and attempt another time and catch/register.This process continues till a system acquisition/registration trial and success, perhaps till not having other candidate system.In a preferred embodiment, if catch/register trial and success, then wireless communication system is used to following radio communication service.In an alternative embodiment, acquired wireless communication system has a known geographic area and attempt obtaining and registering a preferred wireless communication system once more in described geographic area.
Replace in the system acquisition sequence first, select first system according to system acquisition procedure.Can use any system acquisition procedure, comprise and select to be moved station most recently used system.Signal quality to the system selected is measured, and if this system can not be acquired, then select next system according to system acquisition procedure.If a chosen system might be acquired, then attempt obtaining and registering the system of described selection.If catch/register trial and success, this wireless communication system is used to following radio communication service so.Otherwise, select next system according to system acquisition procedure.
By examining following worry DETAILED DESCRIPTION OF THE PREFERRED, more complete understanding and its other advantage and the realization of purpose for the effective selection of wireless communication system and the method and apparatus of catching all will be represented to those skilled in the art.Describe with reference to the accompanying drawings, at first will describe accompanying drawing simply.
Description of drawings
From the detailed description below in conjunction with annexed drawings set forth, it is more apparent that features, objects and advantages of the invention will become, and in the accompanying drawing, similar reference number correspondingly identifies everywhere, wherein:
Fig. 1 has illustrated a preferred embodiment of the present invention;
Fig. 2 is a mobile radio station according to the preferred embodiment of the invention;
Fig. 3 a is system's table according to the preferred embodiment of the invention;
Fig. 3 b be according to the preferred embodiment of the invention one catch table;
Fig. 4 has illustrated quilt mobile radio station use question blank according to the preferred embodiment of the invention;
Fig. 5 is the flow chart of preferred systems selection of explanation and prize procedure; With
Fig. 6 is the system's selection of a replacement of explanation and the flow chart of prize procedure.
Embodiment
Referring now to Fig. 1 the preferred embodiments of the present invention are described.Mobile radio station 2 operates in the geographic area 4 of at least one base station 6 service.Each base station 6 all is connected to network 8, this is a part of supporting the big wireless communication system of at least one multi-address radio communication agreement, described multi-address radio communication agreement comprises code division multiple access (CDMA), wideband CDMA (WCDMA), Advanced Mobile Phone Service (AMPS), global system for mobile communications (GSM), GPRS (GPRS) or high data rate (HDR) technology (for example, 1xEV technology).Mobile radio station 2 can be any wireless device, no matter be that fix or mobile, it is suitable for carrying out radio communication with at least one base station 6, for example cell phone, beep-pager, PDA(Personal Digital Assistant), onboard navigation system or portable computer.In a preferred embodiment, mobile radio station is a multi-mode equipment that is adapted to operate in CDMA and two kinds of patterns of AMPS.
Mobile radio station 2 comprises the tabulation of the known wireless communication system such as optimum roaming list (PRL) 10.PRL10 is stored in the nonvolatile memory of mobile radio station 2, and is included in to attempt obtaining and to register and is moved the wireless communication systems that use at station 2 and the tabulation of respective capture parameter during the wireless communication system.In a preferred embodiment, the wireless communication system of listing among the PRL10 is grouped according to the geographic area, and in each zone from the most desirable to least desirable ordering.As known in the art, PRL10 can safeguard by the service supplier of mobile radio station, and comprises by its wireless service provider or agreed to provide other wireless service provider of roaming service to tabulate for the wireless communication system that mobile radio station 2 uses to mobile radio station 2.
In the operation, mobile radio station 2 attempts obtaining and registering an available wireless communication system that wireless service is provided to mobile radio station 2.At first, from PRL10, select one group of wireless communication system according to a reservation system prize procedure.This set of systems has one can be moved the priority that use between trial period in system acquisition and registration at station 2.For example, in a preferred embodiment, the wireless communication system in the geographic area 4 of mobile radio station is selected, and in each zone from the most desirable to the ordering of ideal system least.Next, analyze with the corresponding received signal of each selecting system so that definite each corresponding system is moved station 2 relative possibilities that obtain.Then, the wireless communication system group is rearranged order of priority, so that produce a more effective system acquisition order based on analysis result.Mobile radio station 2 selects to have the system of the highest relative priority level from the group that rearranges order of priority, and attempts obtaining and registering selected system.If catch/register trial and success, then Xuan Ding system is moved the station and 2 is used for radio communication.Otherwise, from this group, attempt obtaining/registering system with next highest priority.
With reference now to Fig. 2, the preferred embodiment of mobile radio station 2 is described.Mobile radio station 2 comprises treatment circuit 80, memory 82, communication transceiver 84 and antenna 86.Preferably, treatment circuit 80 comprises a processor controls 90, signal processor 92, searcher 94 and system's determining unit 96 of the operation that is used to control mobile radio station 2.Preferably, memory 82 comprises volatibility and nonvolatile RAM, and it stores an optimum roaming list, comprises system's table 100 and catches table 102.Memory 82 can also be stored one or more question blanks, such as the tabulation of most recently used system 106 and the program command of being carried out by treatment circuit 80.
Searcher 94 is suitable for discerning the useful signal such as pilot signal, synchronizing channel and paging channel that is received by antenna 86 by transceiver 84.At the United States Patent (USP) 5 of the title that transfers the assignee of the present invention for " diversity receiver in the cdma cellular telephone system " (DIVERSITY RECEIVERIN A CDMA CELLULAR TELEPHONE SYSTEM), 109, the design and the equipment of the searcher hardware that CDMA catches have been described in No. 390, and with described document at this with reference to use.Searcher 94 also is suitable for carrying out the preliminary acquisition analysis of one or more candidate communications systems.
System's determining unit 96 is suitable for selecting one or more wireless communication systems from system's table 100, and extracts from search list 102 and catch parameter accordingly.System's determining unit 96 is applicable to also and is transmitted to searcher 94 catching parameter that searcher 94 attempts obtaining a selected system.In an alternative embodiment, system's determining unit 96 judges that whether the current wireless communication systems are idealized system in the current geographic area of mobile device, but and, send trial to obtain a better system by mobile radio station 2 when better system's time spent.Being used to carry out method and apparatus that optimum decision system selects in a kind of mobile radio station that can operate in a plurality of geographic areas is disclosed in and assigns to assignee's the title United States Patent (USP) 6 for " being used to carry out the method and apparatus that optimum decision system is selected " (METHOD AND APPARATUS FOR PERFORMING PREFERREDSYSTEM SELECTION), 085, be disclosed in No. 085, and at this with reference to use.
Be appreciated that the mobile radio station 2 that shows among Fig. 2 is just schematic, alternative configuration and additional features all can be expected within scope and spirit of the present invention.For example, use the traditional circuit element such as one or more processors, memory and ASIC(Application Specific Integrated Circuit) (ASIC), can be implemented in the assembly of mobile radio station 2 in the various hardware configurations.Mobile radio station 2 also can be suitable for Speech Communication, high-speed data communication, video communication, the internet, applications such as Email and World Wide Web visit, location positioning (gpsOneTM that example is developed by this as assignee), personal navigation, speech recognition, integrated removable memory device, and is connected with the short-distance radio of local peripheral hardware and equipment.In a preferred embodiment, treatment circuit 80 comprises the mobile station modems chipset by this assignee exploitation, and its integrates numeral and analog functuion and based on the location positioning of GPS.
Referring now to Fig. 2 and 3a, come a preferred embodiment of descriptive system table 100.System's table 100 comprises that mobile radio station 2 is in a tabulation of attempting obtaining and register the wireless communication system that uses during the wireless communication system.As shown in the figure, each record in system's table 100 comprises a system identifier (SID) 100a, network identifier (NID) 100b, the expression system is or not by the indication 100c of preferred (P/N), the identifier 100d of the geographic area (zone) that covers by system, pointer (AT pointer) 100f of a record in the table 102 is caught in expectation information 100e and sensing.Each wireless communication system of listing in system's table 100 is discerned by unique a pair of SID100a, NID100b, and be designated as by P/N100c and can be moved the optimum decision systems that use at station 2 during roaming, perhaps be designated as not should be by that this mobile device 2 uses during roaming not selected system.In alternative embodiment, can use other system identifier such as unique frequency band, pattern and frequency, IPv 6 (IPV6) address or Public Land Mobile Nerwork (PLMN) identifier to come the wireless communication system of listing in the tag system table 100.Preferably, wireless communication system divides into groups by geographic area 100d, and utilizes expectation information 100e according to being stored in system's table 100 from optimal system to the sortord of ideal system least in each zone.
Referring now to Fig. 3 b, a preferred embodiment of catching table 102 is described.Catch table 102 and comprise the needed parameter list of the wireless communication system of listing in the capture systems table 100.As shown in the figure, preferably, each record all comprises a pattern 102a, frequency band 102b and frequency 102c in catching table 102.Preferably, system's table 100 and catch table 102 and be stored in the nonvolatile memory, and download by other data transfer method that an external source such as the wireless service provider of mobile radio station is supported by wireless connections or mobile radio station 2 and to be updated periodically.Be appreciated that the alternative configurations and the alternative sign that can adopt PRL, system's table 100 according to the present invention and catch table 102 and catch parameter.
As shown in Figure 4, memory also comprises one or more question blanks 104.In a preferred embodiment, question blank comprises: store most recently used (MRU) the table 104a of system that is moved station 2 used system lists recently; One comprises that selected conduct catches the candidate list 104b of the system list of candidate; A preference table 104c with the local preference item setting that keeps mobile radio station 2.Out of Memory also can be stored in the question blank, comprises following the tracks of the historical information that each system uses.Preferably, question blank is stored in the volatibility part of memory 24, but in alternative embodiment, one or more question blanks can be stored in the non-volatile part of memory 24.
With reference now to the flow chart of Fig. 2 and Fig. 5, an optimum decision system acquisition sequence of mobile radio station 2 is described.Preferably, system acquisition sequence is carried out by system's determining unit 96.In step 200,, from the stored list of system, select one group of wireless communication system according to a reservation system prize procedure.In a preferred embodiment, from system's table 100, select the wireless communication system in the geographic area 4 of mobile radio station, and corresponding system identifier is stored among the candidate list 104b in the memory 24.In alternative embodiment, candidate list 104b can comprise other data such as catching parameter and selecting system expectation information accordingly.Preferably, the priority initial order determined according to the preheater system prize procedure of candidate list 104b sort (for example, from the most desirable to ideal system least).Though what diagram was used is system's selection of PRL, should be appreciated that, according to a preferred embodiment of the invention, can use the other system prize procedure.For example, in alternative embodiment, system acquisition procedure can comprise selects a group system from the system list of MRU104a or other storage.
As known in the art, system table 100 regulation is moved station 2 and is catching/register between trial period an employed optimum decision system and catch in proper order., this system acquisition order always is not used to obtain and register system's selecting sequence of the full blast of wireless communication system.The selecting sequence of system table 100 regulation is listed system by the wireless service provider of mobile radio station based on each usually and whether is moved the incoherent coefficient of station 2 possibilities of obtaining and determines.For example, can use criterion agreement, the support of unique feature and the user whether mobile radio station 2 is listed as wireless communication system that the telecommunication service quality that provides such as system's use cost, system, system use or the like to determine the expected degree of each system.
In order to improve the efficient of system acquisition/registration process, mobile radio station 2 analyze with candidate list 104b in the corresponding received signal of each system (step 202), and catch order (step 204) based on the analysis result Adjustment System.In first preferred embodiment, the analysis of received signal comprises the received signal intensity (Rx) of measuring each system.In operation, searcher 94 is progressively checked the system that identifies among the candidate list 104b that stores in memory 24.In alternative embodiment, candidate list can send to searcher 94 from system's determining unit 96.For each system that lists, searcher 94 order transceivers 84 switch to the respective channel of system.Measure received signal intensity then and it is stored among the candidate list 104b.If received signal strength measurement is low relatively, then the candidate system probability that will can be used for catching will be very low.If received signal strength measurement is high relatively, then the candidate system probability that can be acquired can be higher.Should be appreciated that, the signal strength measurement of a group system usually can than attempt obtaining and the registration group in be done in short a lot of time of time of each system.In alternative embodiment, help to judge that other test whether candidate system may be acquired can carry out with regard to received signal.
In first alternative embodiment, the analysis of received signal comprises determines whether received signal may be a CDMA signal.In this embodiment, system's determining unit 96 order searchers 94 are measured signal to noise ratio Ec/Io, are the intensity of received signal at this Ec, and Io is the total thermal noise that receives on the channel.In a cdma system, this measured value provides an available received signal indication partly.If ratio Ec/Io is big relatively, the candidate system probability that can be acquired can be bigger so.Ratio Ee/Io provides an indication that whether may be acquired than the more reliable expression signal of measuring of signal green strength.
In second alternative embodiment, system's determining unit 96 and searcher 94 provide a plurality of test mode and methods of catching, and can be suitable for using the analysis independent or combination of an above type.Test mode can be determined by User Preferences, mobile radio station configuration, the current running status of mobile radio station or other criterion.Preferably, searcher 94 is according to the instruction manipulation of receiving from system's determining unit 96, and system's determining unit 96 is suitable for launching a candidate systems and a system acquisition instruction.Candidate systems comprises the parameter of discerning candidate list, and each candidate system is carried out the identifier of test and the minimum threshold that each system will satisfy.Searcher 94 is carried out and is received instruction and return the candidate system that meets testing requirement.In a preferred embodiment, searcher 94 is revised the candidate list that is stored in the memory.System's determining unit 96 also is suitable for the analytical test result, and a system acquisition instruction that comprises the parameter of discerning candidate list is transmitted to searcher 94.
In step 204, the set of systems of selecting is rearranged order of priority so that produce more efficient system acquisition order based on analysis result.In a preferred embodiment, all systems all so ordering so that to have those systems of the maximum likelihood that is acquired at first selected.In first alternative embodiment, the system of a plurality of selections has identical level of desirability.In each level of desirability, use the system ordering of measured signal strengths to selecting, from system that most probable is acquired to the system that least may be acquired.In second alternative embodiment, adjust the expectation information of the system of each selection based on the thermometrically value.For example, signal strength measurement can adjust upward greater than the relative expecting degree of the system of first threshold value, can adjust downwards and signal strength signal intensity is lower than the relative what one hopes or wishes for of the system of second threshold value.Use the expectation information sorting selected set of systems adjusted then.In the 3rd alternative embodiment, deletion test signal quality is lower than each system of threshold value from the set of systems of selecting.For example, corresponding measured signal strengths be lower than-candidate system of 90db can eliminate from candidate list.Also can use other criterion to eliminate and the ordering candidate system.For example, consider whether measured signal strengths, system were used recently, expecting degree parameter and out of Memory, then can use a weighted factor.
After the set of systems of selecting is rearranged order of priority, mobile radio station 2 attempt obtaining and the registration group in one of wireless communication system.In step 206, from candidate list 104b, select to have the system of highest level of priority.In a preferred embodiment, based on the signal quality of measuring, such as signal strength measurement, this system has a high relatively level of desirability and catches/register the high possibility of trial and success.In step 208, attempt obtaining and registering the system of selection.Can use any system acquisition method that comprises the legacy system catching method of knowing in this area.In a preferred embodiment, mobile radio station 2 is suitable for obtaining a cdma system.In order to obtain a cdma system, searcher 94 order transceivers 84 switch to the communication channel of selected cdma system, and listen to pilot signal.Searcher 94 attempts examining the pilot signal of reception till finding a coupling by various pseudo noises (PN) skew in the test received signal.When obtaining pilot signal, treatment circuit 80 receives the information of Forward CDMA Channel and the phase reference of signal demodulation.Next, treatment circuit 80 attempts obtaining the synchronizing channel relevant with the pilot channel of being discerned.The basic system information of synchronizing channel emission such as unique SID/NID of emission wireless communication system and network, and synchronizing information.Treatment circuit 80 switches to the paging channel of base station then according to its timing of reception information adjustment.When mobile radio station 2 was not assigned to a Traffic Channel, paging channel was made by the home base stations of current communication system and is used for communicating by letter with mobile radio station 2.By paging channel, base station notice mobile radio station 2 incoming call message are such as the voice mail message of Inbound Calls calling or reception.
If catch/register trial and success (step 210), the system of Xuan Zeing is moved the station and 2 is used for radio communication so.Attempt not success if catch/register, (in step 212) so, selection has the wireless communication system of inferior highest priority from candidate list, and attempts control is turned back to step 208 for catch/register next time.If searcher 94 can not obtain system's (step 210) of selection, then searcher 94 will attempt obtaining in the remaining system each till obtaining a radio communication or candidate system and exhausting according to selecting sequence.In an alternative embodiment, if catch/register trial and success in step 210, process turns back to step 200 so, so as to select in the current geographic area than the system of selecting better a group system.
In the flow chart of Fig. 6, represented an alternative system acquisition sequence.In step 250, select first system according to the reservation system prize procedure.Can use any system acquisition procedure, comprise and select to be moved station 2 nearest used systems.Measure the signal quality of the system of selecting in step 252.If system is acquired (step 254) possibly, attempt obtaining and registering the system of selection in step 256 so.In a preferred embodiment, if the signal quality of measuring surpasses a predetermined threshold, then this system is acquired possibly.If system can not be acquired, then select next system according to system acquisition procedure in step 260.If catch/register trial and success (step 258), mobile radio station 2 uses selected system to be used for following radio communication service so.Attempt getting nowhere if catch/register, select next wireless communication system in step 260 so, and step 252 is returned in control.
So far described and be used for that wireless communication system is effectively selected and the preferred embodiment of the method and apparatus of catching, obviously reached for a person skilled in the art in described intrasystem some advantage.Should also be appreciated that: in scope and spirit of the present invention, can make its various modifications and make alternative embodiment applicatory.
Scope of the present invention is defined by following claim.
Claims (23)
1. in a mobile radio station that stores the wireless communication system tabulation, a kind of system acquisition procedure comprises the steps:
According to a reservation system prize procedure, from this tabulation, select one group of wireless communication system, described wireless communication system group has first system acquisition order;
Measure the signal quality of each selected system;
According to the signal quality of measuring the wireless communication system group is rearranged order of priority, the wireless communication system group that rearranges order of priority has second system acquisition order; And
Attempt obtaining wireless communication system according to second system acquisition order with highest priority.
2. the method for claim 1, wherein the wireless communication system tabulation is an optimum roaming list that comprises the geographic area identifier, and select the step of one group of wireless communication system to comprise: the current geographic area of determining this mobile radio station, and select to have the listed wireless communication system of a geographic area identifier corresponding with the current geographic area of this mobile radio station, and
Wherein, first system acquisition order is based on the relative order of selected wireless communication system in the optimum roaming list.
3. the method for claim 2, each wireless communication system that wherein identifies in the optimum roaming list has a corresponding level of desirability, has at least two selecting systems to share same level of desirability, and
The step that wherein rearranges order of priority comprises that the location shares the selecting system of same level of desirability, and the system of being located according to the measured signal strengths ordering.
4. the method for claim 3, each wireless communication system that wherein identifies in the optimum roaming list has a corresponding level of desirability, and the step that rearranges order of priority comprises the steps:
For each selected system, based on the corresponding level of desirability of corresponding measured signal strengths adjustment, the expecting degree criterion of having adjusted is stored in the wireless communication system group; With
According to the level of desirability ordering wireless communication system group of having adjusted.
5. the process of claim 1 wherein that the step that rearranges order of priority comprises selected system of deletion from described group, if the signal quality of its corresponding measurement does not satisfy minimum threshold.
6. the process of claim 1 wherein that the step of measures signal quality comprises the ratio Ec/Io that calculates received signal.
7. mobile radio station comprises:
The memory of a storage optimum roaming list, described optimum roaming list comprises first group of a plurality of system identifier and catches parameter accordingly; With
A treatment circuit is applicable to according to pre-definite system acquisition procedure and selects wireless communication system that from this optimum roaming list selected wireless communication system has a corresponding system acquisition order,
Wherein: this treatment circuit is applicable to also based on the signal quality of measuring and measures the signal quality of each selecting system and revise system acquisition order that the system acquisition order of modification has increased the efficient of system acquisition process.
8. the mobile radio station of claim 7, wherein selected wireless communication system comprises corresponding expecting degree criterion, and
Wherein, if the corresponding signal intensity measurements surpasses first threshold, this treatment circuit also is suitable for adjusting the expecting degree criterion of selected system, and uses the what one hopes or wishes for criterion of the having adjusted selecteed wireless communication system that sorts.
9. the mobile radio station of claim 7, wherein the signal quality of the measurement of each system comprises the signal to noise ratio of received signal, described signal to noise ratio is corresponding with the possibility of obtaining with corresponding system.
10. in the multi-mode mobile station in being adapted to operate in CDMA and AMPS pattern, a kind of method that is used to obtain wireless communication system comprises the steps:
The signal that analysis receives on a channel relevant with a candidate communications systems;
Based on analysis to received signal, determine whether described candidate communications systems may be moved the station and catch; With
Have only and when candidate communications systems may be used to catch, just attempt obtaining described candidate communications systems.
11. the method for claim 10, wherein analytical procedure comprises and switches to a channel relevant with described candidate communications systems and test the signal quality of received signal.
12. the method for claim 11, wherein this mobile radio station comprises a table of known communication system, and each known communication system has a relative expecting degree, and wherein selects candidate communications systems according to the reservation system prize procedure from the known communication system table.
13. the process of claim 1 wherein that the test signal quality is a received signal strength measurement.
14. the method for claim 11, wherein the test signal quality is the signal to noise ratio of a received signal.
15. the method for claim 11, if when wherein the signal quality of Ce Lianging surpasses predetermined threshold, this communication system might be selected.
16. the method for claim 11 further comprises the step of selecting one group of candidate communications systems, is repetition to each candidate communications systems analysis and determination step in the group wherein, and the candidate communications systems that most probable is acquired is carried out the trial step.
17. the method for claim 16 comprises that also the order according to the signal quality of measuring sorts to candidate communications systems, described sort order defines the order of catching of candidate communications systems group.
18. in a wireless device, a kind of integrated circuit comprises:
System's determining unit is suitable for discerning the candidate communications systems in the current geographic area of this wireless device; With
Be coupled to a searcher of this system's determining unit, described searcher is suitable for analyzing the signal quality at least one wireless communication system of discerning, so that determine the possibility whether this wireless communication system can be acquired.
19. the integrated circuit of claim 18, wherein this searcher is measured and is identified the corresponding received signal intensity of wireless communication system with each.
20. the integrated circuit of claim 18, wherein this searcher calculates the signal to noise ratio Ec/Io of received signal for each wireless communication system of discerning.
21. the integrated circuit of claim 18 also comprises a memory that is coupled to this system's determining unit, the tabulation of a known communication system of described memory stores, and each known communication system has a relevant geographic area and relative expecting degree,
Wherein by the system of this system's determining unit from selecting searcher to analyze described in this system's table.
22. the integrated circuit of claim 18, wherein this system's determining unit is suitable for launching an instruction to this searcher, and described instruction comprises a test identifier; And
Wherein respond an instruction that receives, the method for testing that this searcher use is discerned by the test identifier is analyzed the signal quality at least one wireless communication system of discerning.
23. the integrated circuit of claim 18, the instruction that wherein is launched also comprise a threshold value, and wherein when the signal quality of at least one analysis surpasses threshold value, this searcher is launched first notification message and is given this system's determining unit.
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| US35574202P | 2002-02-05 | 2002-02-05 | |
| US60/355,742 | 2002-02-05 | ||
| US10/092,700 | 2002-03-06 | ||
| US10/092,700 US20040203745A1 (en) | 2002-03-06 | 2002-03-06 | Method and apparatus for efficient selection and acquisition of a wireless communications system |
Publications (1)
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| CN1628482A true CN1628482A (en) | 2005-06-15 |
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| CN 03803320 Pending CN1628482A (en) | 2002-02-05 | 2003-02-05 | Method and apparatus for efficient selection and acquisition of a wireless communications system |
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| EP (1) | EP1472899A1 (en) |
| JP (1) | JP2006504291A (en) |
| KR (1) | KR20040077931A (en) |
| CN (1) | CN1628482A (en) |
| AU (1) | AU2003219717A1 (en) |
| BR (1) | BR0307440A (en) |
| CA (1) | CA2474506A1 (en) |
| MX (1) | MXPA04007544A (en) |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102017720A (en) * | 2008-05-23 | 2011-04-13 | 高通股份有限公司 | Method and apparatus for channel scanning that improves acquisition probability and power consumption |
| CN101569221B (en) * | 2006-11-17 | 2012-08-22 | 诺基亚公司 | Method and apparatus for providing system selection using dynamic parameters |
| CN104269494A (en) * | 2014-09-15 | 2015-01-07 | 京东方科技集团股份有限公司 | Organic electroluminescent device, manufacturing method thereof and display device |
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| DE10247770B4 (en) * | 2002-10-14 | 2014-05-22 | Hewlett-Packard Development Co., L.P. | A method for supporting a selection of a mobile network and mobile terminal |
| WO2005025092A1 (en) | 2003-09-04 | 2005-03-17 | Samsung Electronics Co., Ltd. | System and method for selecting a serving base station according to a drop of a mobile subscriber station in a broadband wireless access communication system |
| JP2005109722A (en) * | 2003-09-29 | 2005-04-21 | Toshiba Corp | Radio communication equipment and radio communication method |
| US7206578B2 (en) * | 2004-05-25 | 2007-04-17 | Motorola Inc. | Apparatus and method for system selection |
| KR100606782B1 (en) | 2004-06-21 | 2006-08-01 | 엘지전자 주식회사 | Multi-mode mobile terminal, method for triggering communication service using its location information |
| US7689218B2 (en) | 2005-04-14 | 2010-03-30 | Nokia Corporation | Method, apparatus and computer program providing network-associated system priority list for multimode system selection |
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| WO2006109159A2 (en) * | 2005-04-14 | 2006-10-19 | Nokia Corporation | Method, apparatus and computer program providing network-associated system priority list for multimode system selection |
| US8190155B2 (en) * | 2005-05-11 | 2012-05-29 | Interdigital Technology Corporation | Method and system for reselecting an access point |
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| US6415148B1 (en) * | 1999-12-11 | 2002-07-02 | Qualcomm, Incorporated | System and method for the detection of service from alternate wireless communication systems |
| SE522317C2 (en) * | 2000-02-02 | 2004-02-03 | Telia Ab | Method for selecting radio networks, as well as systems and terminals for utilization of the method |
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2003
- 2003-02-05 AU AU2003219717A patent/AU2003219717A1/en not_active Abandoned
- 2003-02-05 RU RU2004126674/09A patent/RU2004126674A/en not_active Application Discontinuation
- 2003-02-05 JP JP2003567124A patent/JP2006504291A/en active Pending
- 2003-02-05 BR BRPI0307440-4A patent/BR0307440A/en unknown
- 2003-02-05 WO PCT/US2003/003625 patent/WO2003067918A1/en active Application Filing
- 2003-02-05 MX MXPA04007544A patent/MXPA04007544A/en not_active Application Discontinuation
- 2003-02-05 CA CA002474506A patent/CA2474506A1/en not_active Abandoned
- 2003-02-05 KR KR10-2004-7011943A patent/KR20040077931A/en not_active Application Discontinuation
- 2003-02-05 CN CN 03803320 patent/CN1628482A/en active Pending
- 2003-02-05 EP EP03715987A patent/EP1472899A1/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101569221B (en) * | 2006-11-17 | 2012-08-22 | 诺基亚公司 | Method and apparatus for providing system selection using dynamic parameters |
| CN102017720A (en) * | 2008-05-23 | 2011-04-13 | 高通股份有限公司 | Method and apparatus for channel scanning that improves acquisition probability and power consumption |
| CN102017720B (en) * | 2008-05-23 | 2014-04-30 | 高通股份有限公司 | Method and apparatus for channel scanning that improves acquisition probability and power consumption |
| CN104269494A (en) * | 2014-09-15 | 2015-01-07 | 京东方科技集团股份有限公司 | Organic electroluminescent device, manufacturing method thereof and display device |
| US9508933B2 (en) | 2014-09-15 | 2016-11-29 | Boe Technology Group Co., Ltd. | Organic light-emitting diode (OLED) device, manufacturing method thereof and display device |
| CN104269494B (en) * | 2014-09-15 | 2017-05-03 | 京东方科技集团股份有限公司 | Organic electroluminescent device, manufacturing method thereof and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| AU2003219717A1 (en) | 2003-09-02 |
| RU2004126674A (en) | 2006-01-27 |
| JP2006504291A (en) | 2006-02-02 |
| MXPA04007544A (en) | 2004-11-10 |
| CA2474506A1 (en) | 2003-08-14 |
| WO2003067918A1 (en) | 2003-08-14 |
| KR20040077931A (en) | 2004-09-07 |
| BR0307440A (en) | 2006-12-19 |
| EP1472899A1 (en) | 2004-11-03 |
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