CN101399563A - Method, terminal and communication system for searching global mobile communication system - Google Patents
Method, terminal and communication system for searching global mobile communication system Download PDFInfo
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- CN101399563A CN101399563A CNA2008101705521A CN200810170552A CN101399563A CN 101399563 A CN101399563 A CN 101399563A CN A2008101705521 A CNA2008101705521 A CN A2008101705521A CN 200810170552 A CN200810170552 A CN 200810170552A CN 101399563 A CN101399563 A CN 101399563A
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Abstract
The invention provides a method for searching a global mobile communication system network, a terminal and a communication system; wherein, the method includes the following steps: at least one frequency point information, a signal on the frequency point and signal intensity are acquired; whether the signal on the frequency point is decoded is judged according to the acquired frequency point information; if yes, the signal on the frequency point is decoded. The terminal divides signals into signals needing to be decoded and signals not needing to be decoded by judging the acquired frequency information, the signal on the frequency and the signal intensity and using the technical proposal provided by the invention and according to the characteristic of CDMA frequency bandwidth. The signal needing to be decoded is decoded, thus increasing the efficiency of the terminal searching GSM network and avoiding that the terminal always decodes a CDMA signal on different frequency points.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of method, terminal and communication system of communication system for searching global mobile.
Background technology
In the epoch that the communication technology develops rapidly, the communication technology has experienced the evolution from first generation mobile communication technology to the 3G (Third Generation) Moblie technology, and people are also in positive exploitation the 4th third-generation mobile communication technology.But, present stage, second generation mobile communication technology still served for people are providing, wherein a kind of second generation mobile communication technology: global system for mobile communications (GSM:Global System for MobileCommunications), it is a kind of mobile communication technology standard that originates from Europe.Therefore, the present stage people use the multiple communication technology to realize communication, i.e. GSM network and other network and deposit.
In the prior art, the method for GSM mobile handset search GSM network comprises: at first, obtain the intensity of signal on signal on the different frequency and this frequency, wherein, the different different channels of frequency representative, each channel has unique identifier, be channel number, also can be called frequency; Secondly, according to signal strength signal intensity by to weak order channel being sorted by force; The 3rd, according to signal strength signal intensity by strong to weak ordering, signal is decoded, up to decoding successfully, then finished the process that GSM mobile handset searches the GSM network.
When the shared identical frequency range of GSM network and code division multiple access (CDMA:Code Division Multiple Access) network; when GSM mobile handset in search network; the signal that obtains is decoded; because a lot of signals that obtain are CDMA signals; and; the intensity of CDMA signal usually can be stronger, when sorting, is arranged in forward position usually.GSM mobile handset can not successfully be decoded to signal on a lot of channels, therefore, makes the time ratio of GSM mobile handset search GSM network not have under the situation of CDMA co-channel interference, searches for the duration of using of GSM network.And some GSM mobile handset is because the restriction of hardware technology, can not decode to the signal on all channels that obtain, only to signal strength signal intensity by strong in weak ordering, arrange more preceding signal and decode, cause GSM mobile handset under the situation that the CDMA co-channel interference is arranged, search is less than network.
Summary of the invention
The embodiment of the invention provides a kind of method, terminal and communication system of communication system for searching global mobile, has solved that the CDMA signal makes the GSM terminal can search for the GSM network more rapidly to the problem of the interference of GSM terminal in the GSM network.
The embodiment of the invention provides a kind of method of searching for global system for mobile communications GSM network, comprising:
Obtain signal and signal strength signal intensity at least one frequency point information, the described frequency;
According to the described frequency point information of obtaining, judge whether the signal on the described frequency is decoded; If,
Signal on the described frequency is decoded.
The embodiment of the invention also provides a kind of terminal, comprising:
Acquiring unit is used to obtain signal and signal strength signal intensity at least one frequency point information, the described frequency;
Judging unit is used for the frequency point information obtained according to described, judges whether the signal on the described frequency is decoded;
Decoding unit is used for the judged result according to described judging unit, and the signal on the described frequency is decoded.
The embodiment of the invention also provides a kind of communication system, comprising:
Terminal is used to obtain signal and signal strength signal intensity at least one frequency point information, the described frequency, according to the described frequency point information of obtaining, judges whether the signal on the described frequency is decoded, if the signal on the described frequency is decoded;
Network side is used for sending wireless signal on different frequent points, described wireless signal can comprise the authorization information of accessing terminal to network.
By the technical scheme that adopts the embodiment of the invention to provide, characteristics according to the CDMA frequency bandwidth, terminal by to obtain frequency point information, signal and signal strength signal intensity on frequency judged, with the signal of division of signal for decoding, do not need the signal of decoding, signal to the needs decoding is decoded, thereby has improved terminal searching GSM networks efficiency, has avoided terminal all the time the CDMA signal on the different frequent points to be decoded.
Description of drawings
Fig. 1 is the flow chart of the method for a kind of GSM of search network of providing of the embodiment of the invention one;
Fig. 2 is the flow chart of the method for a kind of GSM of search network of providing of the embodiment of the invention two;
Fig. 3 is the logic composition diagram of a kind of terminal of providing of the embodiment of the invention three;
Fig. 4 is the logic composition diagram of a kind of terminal of providing of the embodiment of the invention four;
Fig. 5 is the logic composition diagram of a kind of communication system of providing of the embodiment of the invention five.
Embodiment
The embodiment of the invention provides a kind of method of searching for global system for mobile communications GSM network, the GSM terminal according to all frequencies of obtaining and on all frequencies the information of signal strength signal intensity analyze, selection is decoded to the signal on the part frequency, if decode successfully, then the GSM terminal searching is to the GSM network.Below in conjunction with specific embodiment the embodiment of the invention is elaborated.
Embodiment one, and a kind of method of searching for global system for mobile communications GSM network referring to shown in Figure 1, comprising:
Step 1:GSM terminal is obtained at least one frequency point information, the signal on frequency and signal strength signal intensity;
Step 2:, judge whether the signal on the described frequency is decoded according to described frequency point information; If enter step 3;
Step 3: the signal on the described frequency is decoded.
Wherein, the GSM terminal can get access to signal, and can know the signal strength signal intensity of signal when search network on a plurality of frequencies.It will be appreciated that if when successfully decoding a signal in the step 3, this terminal has just searched network.
The method that adopts the embodiment of the invention one to provide, the GSM terminal can be under the situation that the interference of CDMA signal is arranged, order and/or signal strength signal intensity according to frequency, judge and whether this signal is decoded, decode to being judged as the signal that is, thereby improved GSM terminal searching networks efficiency, avoided the GSM terminal all the time the CDMA signal on the different frequent points to be decoded.
More than be the explanation of the method for a kind of GSM of search network that the embodiment of the invention one is provided, the embodiment of the invention also provides a kind of method of the GSM of search network, describes below in conjunction with two pairs of these methods of embodiment.
Embodiment two, and a kind of method of searching for the GSM network referring to shown in Figure 2, comprising:
Steps A 1:GSM terminal is obtained frequency point information, the signal on frequency and signal strength signal intensity;
Wherein, the GSM terminal can scan wireless environment after start powers in steps A 1, obtains signal on a plurality of frequencies and signal strength signal intensity in the wireless environment.
Steps A 2:, judge whether described frequency belongs to the frequency in continuous 6 or 6 the above frequencies, if enter steps A 3 according to the frequency point information of obtaining in the steps A 1; If not, enter steps A 4;
Wherein, need to prove, because the CDMA carrier bandwidths is generally 1.25MHz, and the GSM carrier bandwidths is generally 200kHz, and the CDMA carrier bandwidths approximately can be thought six times of GSM carrier bandwidths, that is to say that a CDMA carrier signal can be searched on six continuous frequencies by the GSM terminal, and the GSM terminal can be judged as six GSM sub-districts, CDMA signal on these six continuous frequencies is decoded, and yes can not decode, and causes GSM terminal searching GSM networks efficiency low.
Steps A 3:, judge whether the difference of the signal strength signal intensity on adjacent two frequencies satisfies the P1 standard, if enter steps A 8 in described continuous 6 or 6 the above frequencies according to the signal strength signal intensity on the frequency that obtains in the steps A 1; If not, enter steps A 4;
Wherein, two frequencies that the signal strength signal intensity on the regulation adjacent frequency differs less than 10dBm in the P1 standard described in the steps A 3 are the CDMA signal.Whether the difference of judging the signal strength signal intensity on adjacent two frequencies in steps A 3 less than the reason of 10dBm is: because the improving constantly of hardware technology, use as band pass filter (BPF:Band Pass Filter) makes the CDMA transmitter can well be suppressed at the intensity of CDMA bandwidth external signal.In a CDMA bandwidth, the signal strength signal intensity of the signal on the adjacent frequency is approaching.When the signal strength signal intensity on the adjacent frequency that the GSM terminal receives differs bigger, can think that the signal on the described adjacent frequency is non-CDMA signal.Described P1 standard can be thought to preset in the terminal, is called first value that presets.
Wherein, it is non-CDMA signal that the signal strength signal intensity in the embodiment of the invention two on the regulation adjacent frequency differs two frequencies that are not less than 10dBm, and thinks that two frequencies that signal strength signal intensity on the adjacent frequency differs less than 10dBm are the CDMA signal.Need to prove, be to be 10dBm in the present invention in the P1 standard with difference in signal strength on the adjacent frequency, perhaps littler, as the standard of dividing CDMA and non-CDMA signal, in fact, other criteria for classifying can also be arranged, specifically can be according to hardware capabilities among the CDMA, as: the BPF signal intensity attenuation 35dBm that bandwidth is outer in the CDMA transmitter can be that 30dBm is as the standard of dividing CDMA and non-CDMA signal with difference in signal strength on the adjacent frequency then.
Need to prove, be two classes by above steps A 2 and steps A 3 with the division of signal on all frequencies that obtain in the steps A 1: a class is to be judged as non-CDMA signal, the promptly following steps A 4 that will talk about; One class is to be judged as CDMA signal, the promptly following steps A 8 that will talk about.
Steps A 4: judge that the signal on the frequency is non-CDMA signal;
Steps A 5: all signals that are judged as non-CDMA signal in the steps A 4 are decoded;
Wherein, need to prove, in steps A 5, can decode to more than one non-CDMA signal according to the order that presets.Usually, the signal that is judged as non-CDMA signal can be sorted, the principle of ordering can be to sort according to the signal strength signal intensity that is judged as non-CDMA signal, and signal strength signal intensity is big more, and row's position is just forward, can carry out the decoding of signal earlier.Certainly, the method for other ordering can also be arranged, more than explanation should not be construed as limitation of the invention.
Steps A 6: judge whether that a signal on the frequency is successfully decoded, if, enter steps A 7, if not, enter steps A 9;
Steps A 7: search the GSM network;
Steps A 8: judge that the signal on the frequency is the CDMA signal;
Wherein, it will be appreciated that, in fact the signal that is judged as CDMA in steps A 8 is the CDMA signal all just not necessarily, wherein also may include the GSM signal, be characteristics in embodiments of the present invention according to the CDMA carrier frequency band, judge that signal might be the CDMA signal, at first with terminal scanning to all signals be divided into two classes: a class is the CDMA signal, a class right and wrong CDMA signal; Think that non-CDMA signal most possibly is the GSM signal, decodes to non-CDMA signal.If do not search network in once judging, just the signal that the last time is judged as CDMA is judged once more, isolates signal that is judged as non-CDMA and the signal that is judged as CDMA.Circulation successively is till searching network.
Steps A 9: be judged as the CDMA signal among the obtaining step A8, the difference in signal strength on the adjacent frequency is reduced by the second value 1dBm that presets as the P1 standard, enter steps A 3, finish up to searching the GSM network.
Wherein, the effect of described steps A 9 is, constantly reduce the standard that is judged as non-CDMA signal, in steps A 3 according to the P1 standard that reduces, the signal that is judged as CDMA the last time is judged once more, the feasible last time is judged as GSM signal possible in the signal of CDMA and is separated, and makes the GSM terminal can successfully search the GSM network as early as possible.
Need to prove; though the method that the embodiment of the invention provides is under the situation that has the CDMA homogenous frequency signal to disturb outstanding advantage to be arranged; under the situation that does not have the CDMA homogenous frequency signal to disturb; because in the GSM network planning; have the protection frequency band between the adjacent frequency, can be according to actual conditions, the intensity difference of the signal on the regulation adjacent frequency is used as the P1 standard; thereby reduced the quantity that needs the signal of decoding, improved GSM terminal searching GSM networks efficiency.
More than in the explanation to the embodiment of the invention two, the GSM terminal is according to frequency point information, the signal on frequency and the signal strength signal intensity obtained, by judgement to signal strength difference on frequency point information and the adjacent frequency, with the division of signal on all frequencies that obtain is CDMA signal and non-CDMA signal, decode to being judged as non-CDMA signal, thereby reduced the quantity that needs the signal of decoding, improved GSM terminal searching GSM networks efficiency.
More than be the explanation of method that the embodiment of the invention is provided,, a kind of terminal that the embodiment of the invention provides done explanation below in conjunction with specific embodiment.
Embodiment three, and a kind of terminal referring to shown in Figure 3, comprising: acquiring unit 10, judging unit 20 and decoding unit 30.
Wherein, described acquiring unit 10 is used to obtain at least one frequency point information, the signal on frequency and signal strength signal intensity;
A kind of terminal that adopts the embodiment of the invention three to provide, by judging unit according to receive signal place frequency and/or on this frequency the characteristics of signal strength signal intensity, judge the signal that need decode, described signal is decoded.Use this terminal can improve the efficient of search network.
The embodiment of the invention also provides a kind of terminal, and this terminal is similar to the terminal that embodiment three provides, and can realize the search of terminal to network, and this terminal also can improve the efficient of search network.Below this terminal is done explanation.
Embodiment four, and a kind of terminal referring to shown in Figure 4, comprising: first acquiring unit 101, comprehensive judging unit 50 and first decoding unit 60.
Wherein, first acquiring unit 101 and first decoding unit 60, corresponding similar with the acquiring unit 10 in the terminal that embodiment three provides with decoding unit 30, can be with reference to the explanation among the embodiment three.
Wherein, described comprehensive judging unit 50 is used for described frequency point information and the described signal strength signal intensity obtained according to first acquiring unit 101, judges whether the signal on the described frequency is decoded.Described comprehensive judging unit 50 can comprise: first judging unit 501 and second judging unit 502.
Wherein, first judging unit 501 is used for according to the frequency point information obtained, judges whether described frequency belongs to the frequency in continuous 6 or 6 the above frequencies;
Wherein, described P1 standard can be set according to the actual conditions of network, for example: on a CDMA frequency range, difference in signal strength between the CDMA signal on the adjacent frequency that common terminal receives is no more than first value that presets and is assumed to be 10dBm, and promptly the signal strength signal intensity of the CDMA signal on the adjacent frequency is similar.Therefore, can think in the present embodiment: two frequencies that differ less than 10dBm with the signal strength signal intensity on the adjacent frequency in second judging unit 502 in the terminal are that the CDMA signal is as the P1 standard.
A kind of terminal that the embodiment of the invention four provides can also comprise sequencing unit 601 and the 3rd judging unit 603.Described sequencing unit 601 and the 3rd judging unit 603 are also included within first decoding unit 60, and therefore, described first decoding unit 60 can comprise: sequencing unit 601, decoding unit 602 and the 3rd judging unit 603.
Described sequencing unit 601 is used for obtaining the signal that first and second judging unit is judged as non-CDMA, with the signal of described non-CDMA according to weak order the signal that is judged as non-CDMA being sorted by force;
Described decoding unit 602 is used for the ranking results according to sequencing unit 601, successively signal is decoded;
Described the 3rd judging unit 603 is used for judging whether decoding unit 602 successfully decodes a signal that is judged as non-CDMA.
A kind of terminal that the embodiment of the invention four provides can also comprise configuration standard unit 401 and transmitting element 701.Described configuration standard unit 401 is used for being judged as non-CDMA signal in first decoding unit 60 is failed comprehensive judging unit 50 when successfully decoding, and the P1 standard is reduced to the second value 1dBm that presets sends to comprehensive judging unit 50 and use; Second judging unit 502 in the comprehensive judging unit 50 obtains the signal that is judged as CDMA, according to the P1 standard that reduces, judges in the described signal that is judged as CDMA that obtains whether have non-CDMA signal once more.Described transmitting element 701 is used for after first decoding unit 60 is successfully decoded a signal, sends authorization information to network side.
Wherein, described configuration standard unit 401 also can be included in the comprehensive judging unit 50.
A kind of terminal that provides at embodiment four below, behind this starting up of terminal, each logical block is done explanation to the concrete processing procedure of signal in the terminal.
Starting up of terminal, first acquiring unit 101 obtains the signal on a plurality of frequencies that network side sends and the intensity of signal in the terminal; First judging unit 501 in the comprehensive judging unit 50 is according to the information of the frequency that obtains, judge whether described frequency belongs to the frequency in continuous 6 or 6 the above frequencies, if not, being judged as this frequency is non-CDMA signal, if, second judging unit 502 judges whether the difference of the signal strength signal intensity on adjacent two frequencies satisfies the P1 standard in described continuous 6 or 6 the above frequencies; Wherein, regulation P1 standard is in the present embodiment: two frequencies that the signal strength signal intensity on the adjacent frequency differs less than 10dBm are the CDMA signal, otherwise, be non-CDMA signal.
Sequencing unit in first decoding unit 60 has obtained all and has been judged as the signal of non-CDMA, with the signal that is judged as non-CDMA signal that obtains, sorts according to the power of signal strength signal intensity, and the result after the ordering is sent to decoding unit 602; Decoding unit 602 is according to the ranking results to non-CDMA signal that receives, according to the signal strength signal intensity of non-CDMA signal to weak order the signal that is judged as non-CDMA being decoded by force; The 3rd judging unit 603 judges whether successfully decode a signal in the decoding unit 602, if the checking message that notice transmitting element 701 sends this terminal if not, then sends and is judged as result not to configuration standard unit 401 to network side; Configuration standard unit 401 reduces 1dBm with the P1 standard, and promptly the difference in signal strength on the adjacent frequency is the CDMA signal less than two frequencies of 9dBm, otherwise, be non-CDMA signal.P1 normal notification after configuration standard unit 401 will reduce is given second judging unit 502.
It more than is the explanation of a kind of terminal that the embodiment of the invention four is provided, whether this terminal is continuous frequency more than 6 or 6 by the signal that judgement receives, in described continuous 6 or 6 above frequencies, whether the difference of the signal strength signal intensity on adjacent two frequencies satisfies the P1 standard, with the division of signal of obtaining is CDMA signal and non-CDMA signal, and the scope of signal of decoding is limited in the signal that is judged as non-CDMA.Thereby improve the terminal searching networks efficiency.Avoid only decoding the CDMA signal and cause terminal can not search the situation of network.
More than be the explanation of terminal that the embodiment of the invention is provided, below a kind of communication system that the embodiment of the invention provides done explanation.
Embodiment five, and a kind of communication system referring to shown in Figure 5, comprising: terminal 80 and network side 90.
Wherein, described terminal 80 is used for the wireless signal according to the network side transmission, judges whether described signal is decoded, if signal is decoded.Described terminal 80 also is used for sending checking message to network side when to after the signal decoding success.Described terminal also is used for according to decoded results, judges whether that a signal on the frequency is successfully decoded; Described terminal also is used for the power according to signal strength signal intensity, and the described signal that the signal on the frequency is decoded that is judged as is sorted.
Described network side 90 is used to send wireless signal, and described wireless signal can comprise the authorization information of accessing terminal to network.
After successfully decoding the signal that receives when terminal 80, think that this terminal searching has arrived network, can utilize this network to communicate, described terminal 80 can be the terminal that embodiment three or four provides, and described terminal 80 can be GSM mobile handset or the wireless terminal that utilizes the GSM network.Described network side 90 can comprise GSM network and cdma network.
By the explanation of above a kind of communication system that the embodiment of the invention five is provided, whether terminal decodes to this signal, if signal is decoded by judging to the received signal.Thereby improve the terminal searching networks efficiency.Avoid only decoding the CDMA signal and cause terminal can not search the situation of network.
One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to finish by program, described program can be stored in a kind of computer-readable recording medium, this program comprises the steps: when carrying out
Obtain signal and signal strength signal intensity at least one frequency point information, the described frequency;
According to the described frequency point information of obtaining, judge whether the signal on the described frequency is decoded; If,
Signal on the described frequency is decoded.
The above-mentioned storage medium of mentioning can be a read-only memory, disk or CD etc.
More than method, terminal and the communication system of a kind of communication system for searching global mobile that the embodiment of the invention provided is described in detail, used specific case herein principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.
Claims (13)
1, a kind of method of searching for global system for mobile communications GSM network is characterized in that, comprising:
Obtain signal and signal strength signal intensity at least one frequency point information, the described frequency;
According to the described frequency point information of obtaining, judge whether the signal on the described frequency is decoded; If,
Signal on the described frequency is decoded.
2, method according to claim 1 is characterized in that, and is described according to the described frequency point information of obtaining, and being judged as decodes to the signal on the described frequency specifically comprises:
According to the information of the described frequency that obtains, judge whether described frequency belongs to the frequency in continuous 6 or 6 the above frequencies;
If not, be judged as the signal on the described frequency is decoded.
3, method according to claim 2 is characterized in that, described method also comprises:
When judging result that whether described frequency belongs to the frequency in continuous 6 or 6 the above frequencies when being, judge that whether the difference of the signal strength signal intensity on adjacent two frequencies is less than first value that presets in described continuous 6 or 6 the above frequencies; If not,
Be judged as the signal on the described frequency is decoded.
4, method according to claim 3 is characterized in that, described signal on the described frequency is decoded after, also comprise:
Judge whether that a signal on the frequency is successfully decoded; If not,
Judge that in the signal of difference less than first value that presets of the signal strength signal intensity on adjacent two frequencies, whether the difference of the signal strength signal intensity on adjacent two frequencies is less than second value that presets.
According to each described method of claim 1 to 4, it is characterized in that 5, described signal on the described frequency is decoded specifically comprises:
According to signal strength signal intensity on the described frequency by strong to weak order, the signal on the described frequency is decoded.
6, a kind of terminal is characterized in that, comprising:
Acquiring unit is used to obtain signal and signal strength signal intensity at least one frequency point information, the described frequency;
Judging unit is used for the frequency point information obtained according to described, judges whether the signal on the described frequency is decoded;
Decoding unit is used for the judged result according to described judging unit, and the signal on the described frequency is decoded.
7, terminal according to claim 6 is characterized in that, described judging unit specifically comprises:
First judging unit is used for the frequency point information obtained according to described, judges whether described frequency belongs to the frequency in continuous 6 or 6 the above frequencies;
Second judging unit is used for according to the signal strength signal intensity on the frequency that obtains, and judges that whether the difference of the signal strength signal intensity on adjacent two frequencies is less than first value that presets in described continuously 6 or 6 the above frequencies.
8, terminal according to claim 7 is characterized in that, described terminal also comprises:
The 3rd judging unit is used for according to the decoding unit decoded results, judges whether that a signal on the frequency is successfully decoded.
9, according to right 8 described terminals, it is characterized in that described terminal also comprises:
The configuration standard unit, be used for when the 3rd judging unit judged result for not the time, the described value that presets is decreased to the numerical value that presets, the numerical value that presets behind described the reducing is sent to second judging unit;
Described second judging unit also is used for judging the signal of the difference of the signal strength signal intensity on adjacent two frequencies less than first value that presets, and whether the difference of the signal strength signal intensity on adjacent two frequencies is less than second value that presets.
10, according to each described terminal of claim 6 to 9, it is characterized in that described terminal also comprises:
Sequencing unit is used for the power according to signal strength signal intensity, and the described signal that the signal on the frequency is decoded that is judged as is sorted.
11, a kind of communication system is characterized in that, comprising:
Terminal is used to obtain signal and signal strength signal intensity at least one frequency point information, the described frequency, according to the described frequency point information of obtaining, judges whether the signal on the described frequency is decoded, if the signal on the described frequency is decoded;
Network side is used for sending wireless signal on different frequent points, described wireless signal can comprise the authorization information of accessing terminal to network.
12, system according to claim 11 is characterized in that, described terminal also is used for according to decoded results, judges whether that a signal on the frequency is successfully decoded.
13, according to claim 11 or 12 described systems, it is characterized in that described terminal also is used for the power according to signal strength signal intensity, the described signal that the signal on the frequency is decoded that is judged as is sorted.
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| CN2008101705521A CN101399563B (en) | 2008-10-17 | 2008-10-17 | Method, terminal and communication system for searching global mobile communication system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103906179A (en) * | 2012-12-28 | 2014-07-02 | 中国电信股份有限公司 | User terminal frequency support information reporting method and system |
| CN105165070A (en) * | 2013-05-23 | 2015-12-16 | Kddi株式会社 | System, program and method for radio terminal to find access point |
| CN107454633B (en) * | 2016-05-31 | 2020-05-08 | 华为终端有限公司 | Method and device for determining voice communication network |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1492611A (en) * | 2002-10-24 | 2004-04-28 | 北京三星通信技术研究有限公司 | Timing method for searching GSM frequency correcting channel in CDMA 2000 system |
| CN100407832C (en) * | 2005-07-05 | 2008-07-30 | 华为技术有限公司 | Method for supporting terminal to realize interacting between communication systems |
| CN101123813A (en) * | 2007-08-28 | 2008-02-13 | 北京天碁科技有限公司 | A method and wireless terminal for searching registration frequency points |
| CN101217813B (en) * | 2008-01-09 | 2011-03-30 | 闻泰集团有限公司 | A method of cross-district calling of dual-card dual-standby mobile telephone |
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2008
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103906179A (en) * | 2012-12-28 | 2014-07-02 | 中国电信股份有限公司 | User terminal frequency support information reporting method and system |
| CN105165070A (en) * | 2013-05-23 | 2015-12-16 | Kddi株式会社 | System, program and method for radio terminal to find access point |
| CN105165070B (en) * | 2013-05-23 | 2019-04-16 | Kddi 株式会社 | System, program and the method for wireless terminal discovery access point |
| CN107454633B (en) * | 2016-05-31 | 2020-05-08 | 华为终端有限公司 | Method and device for determining voice communication network |
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| CN101399563B (en) | 2012-07-04 |
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