CN1610427A - Method for automatic selecting transmitting frequency of radio equipment - Google Patents
Method for automatic selecting transmitting frequency of radio equipment Download PDFInfo
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- CN1610427A CN1610427A CNA2003101023479A CN200310102347A CN1610427A CN 1610427 A CN1610427 A CN 1610427A CN A2003101023479 A CNA2003101023479 A CN A2003101023479A CN 200310102347 A CN200310102347 A CN 200310102347A CN 1610427 A CN1610427 A CN 1610427A
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Abstract
The method for radio equipment to select emitting frequency automatically includes: setting the available frequency set in advance; selecting one emitting frequency for the radio equipment and judging whether the selected frequency has been occupied via receiving the broadcast information in the frequency; if so, selecting one other frequency and repeating the judgment; or else, setting the selected frequency as its emitting frequency. The present invention makes it possible to select the emitting frequency automatically while ensuring that each emitting frequency is used by at most one radio equipment in some area.
Description
Technical field
The tranmitting frequency that the present invention relates to the wireless device in the communication system is provided with technology, relates to the method for the selected automatically tranmitting frequency of a kind of wireless device in the communication technology or rather.
Background technology
At present, the effect of portable terminal in people's daily life is increasing, and people can get in touch with other people easily by portable terminal, and portable terminal also provides various additional functions for the user, such as, the user can be provided with alarm clock, calling transfer etc. in portable terminal.
When using portable terminal, the user often needs according to self residing environment portable terminal to be done different settings, so that portable terminal can provide service for oneself better.Such as, the user can transfer to the calling of portable terminal on the landline telephone of office when office; The user need be set to dumb sound by portable terminal when music hall; The user can be set to ring by portable terminal when outdoor.For present portable terminal, all need user oneself portable terminal to be provided with according to different environment.If the user does not make corresponding setting to portable terminal in certain occasion, then this portable terminal is made troubles to the user possibly, even causes bad influence to the user, such as, if user's portable terminal sends the bell sound in music hall, then will inevitably have influence on other people.
In light of this situation, the applicant has proposed a kind of sign and recognition methods of physical object in application number is 02125256.4 Chinese patent application, can make portable terminal automatically perform the desired operation of user according to the present located environment by this method.This method specifically, be the concentrator marker that is provided with in order to the sign physical object, and in order to the identifier of identification marker, concentrator marker is bound with the physical object that will identify, identifier and the apparatus bound that needs to carry out specific operation, this concentrator marker and identifier are wireless device.Such as, concentrator marker and indoor environment binding, identifier and mobile terminal binding.If identifier searches concentrator marker, then to obtain the identification information of this concentrator marker, and this identification information sent to and the equipment of self binding, the information that this equipment is preserved according to identification information and self is done corresponding operation; If identifier in the regular hour, does not receive the identification information of the concentrator marker that has searched, also, identifier has left the signal cover of this concentrator marker, then does corresponding operation with the equipment of this identifier binding according to the information of self preserving.
For realizing the communication between identifier and the concentrator marker, can be set to transmit by concentrator marker to the external world, be the identification information of concentrator marker to external world's broadcasting self, identifier is set to receive outer signals, identifier determines in self residing environment whether concentrator marker is arranged by the identification information of detecting concentrator marker broadcasting, and determines according to the identification information of receiving whether the corresponding identification device is relevant with self.
This communication plan requires concentrator marker with certain frequency the identification information of self to be broadcasted away.If two or more concentrator markers are arranged in certain scope, for guaranteeing that identifier can correctly receive the identification information of each concentrator marker broadcasting, need each concentrator marker with different frequency broadcast identification information, specifically, can be the different tranmitting frequency of each concentrator marker configuration in the same scope by the manual configuration mode.Such as, a plurality of concentrator markers are arranged in certain scope, then the user needs this tranmitting frequency of record to be used when the concentrator marker that powers on for each is provided with tranmitting frequency, to guarantee to be provided with for the concentrator marker that powers on after other in this scope the tranmitting frequency of unique correspondence.Obviously, this manual configuration mode needs manual intervention, and cumbersome, such as when adjacent Administrative Area is provided with concentrator marker, need coordinate artificially, is not easy to user's use, certainly, also is unfavorable for the popularization of this series products.
Summary of the invention
In view of this, main purpose of the present invention is to provide a kind of wireless device method of selected tranmitting frequency automatically, make wireless device can automatically select the tranmitting frequency of self, and selected tranmitting frequency can be not identical with the used tranmitting frequency of adjacent wireless device.
For arriving above purpose, technical scheme of the present invention is achieved in that a kind of wireless device method of selected tranmitting frequency automatically, sets in advance the tranmitting frequency set that wireless device can be used, and this method further may further comprise the steps:
A. wireless device is selected a tranmitting frequency from the tranmitting frequency set that sets in advance;
B. whether wireless device self receives by judging whether detect current selected tranmitting frequency with the broadcast message of current selected frequency emission occupied, if occupied, then reselect a tranmitting frequency, and execution in step b again, otherwise, enter step c;
C. with the tranmitting frequency of current selected tranmitting frequency as self broadcast message.
Among the described step a, described wireless device is select transmit frequency at random, and among the described step b, the described tranmitting frequency of reselecting is reselected for adopting sequential system.
Among the described step a, described wireless device is select transmit frequency at random, among the described step b, the described tranmitting frequency of reselecting is: wireless device is selected a random frequency again, and with the tranmitting frequency number in the tranmitting frequency set to current occupied tranmitting frequency and this random frequency sum delivery, with the numerical value that obtains as the tranmitting frequency of reselecting.
This method may further include: set in advance the delivery number of times, among the described step b, described wireless device is when reselecting tranmitting frequency, judge at first whether the number of times with delivery mode select transmit frequency has exceeded default delivery number of times, if do not exceed, then continue if exceed, then to adopt the sequential system select transmit frequency with delivery mode select transmit frequency.
This method can further include: if all tranmitting frequencies of wireless device selective sequential are all occupied, then begin selective sequential again from first tranmitting frequency.
Described step c may further include:
Wireless device random wait a period of time, self whether receive by judging whether detect current selected tranmitting frequency with the broadcast message of current selected frequency emission occupied afterwards, if it is occupied, then reselect a tranmitting frequency, and execution in step b again, otherwise, with the tranmitting frequency of current selected tranmitting frequency as self broadcast message.
May further include after the described step c:
Wireless device uses current selected tranmitting frequency broadcast message, and to this tranmitting frequency continuation detecting a period of time, there are other wireless devices outside this wireless device to use this tranmitting frequency if find, then this wireless device discharges this tranmitting frequency, reselect a tranmitting frequency afterwards, and execution in step b again; If no, then continue to use current selected tranmitting frequency to come broadcast message.
Can further include after the described step c:
Wireless device uses current selected tranmitting frequency broadcast message, and periodically detects other wireless devices that whether have outside this wireless device and use the tranmitting frequency of self, if do not have, then continues to use this tranmitting frequency to come broadcast message; If have, then this tranmitting frequency is continued detecting a period of time, if this tranmitting frequency is used by other wireless devices outside this wireless device in this detecting time, then this wireless device discharges this tranmitting frequency, reselect a tranmitting frequency afterwards, and execution in step b again, otherwise, continue to use this tranmitting frequency to come broadcast message.
Described wireless device is detected other wireless devices that whether have outside this wireless device in the gap of broadcast singal and used the tranmitting frequency of self, and this method further comprises: wireless device is in the detecting process, and random offset self is launched the time of broadcast message.
Described wireless device is the concentrator marker that is used to identify physical object, and this method further comprises:
The identifier that is used for identification marker is determined the concentrator marker relevant with self by frequency hopping, and periodically detects the broadcast message of this concentrator marker emission.
When described identifier is determined the concentrator marker relevant with self by frequency hopping, the recognition time of each frequency is no less than the off time of concentrator marker broadcast message and the concentrator marker broadcast message time sum of twice.
This method can further include:
The strength range that concentrator marker reception and processing signals are set receives the also strength range of processing signals greater than identifier.
The present invention program is by the wireless device select transmit frequency, and detect this tranmitting frequency and whether taken by other wireless devices, make a plurality of wireless devices of the same area inside not need user intervention, can select the tranmitting frequency of self, and can guarantee that each tranmitting frequency is maximum only by a wireless device use in this zone.The present invention program has also made things convenient for the use of user to concentrator marker and identifier simultaneously, and is beneficial to the popularization of concentrator marker and identifier.
Description of drawings
Fig. 1 is the present invention program's realization flow figure;
Fig. 2 is the concentrator marker identification range of concentrator marker in embodiment of the invention when identical with the identifier identification range, and the identifier identification range of concentrator marker A and concentrator marker B has the schematic diagram of common region;
When Fig. 3 was the twice of identifier identification range for the concentrator marker identification range of concentrator marker in the embodiment of the invention, the identifier identification range of concentrator marker A and concentrator marker B had the schematic diagram of common region.
Embodiment
All wireless devices are when select transmit frequency, and the method that can use the present invention program to provide is that example describes below with the concentrator marker.
The present invention program need set in advance the tranmitting frequency set that all concentrator markers can be used, and the process of concentrator marker select transmit frequency specifically realizes by following steps referring to Fig. 1:
Step 101, concentrator marker are at first selected the frequency of an own broadcast identification information of conduct, and are entered step 102 after powering in the concentrator marker tranmitting frequency set that sets in advance.
Whether the frequency that step 102～103, concentrator marker detecting are selected self is occupied, occupied if this frequency does not have, and then enters step 104.If this frequency is occupied, then concentrator marker is reselected a tranmitting frequency, and returns step 102.
Here, whether the tranmitting frequency that the concentrator marker detecting is selected self is occupied, specifically, judges exactly whether self can receive the broadcast message of other concentrator markers with this frequency emission, the i.e. identification information of concentrator marker.Whether when concentrator marker was detected certain tranmitting frequency, its detecting time should be longer than the time slot of concentrator marker transmit its identification, occupied to guarantee that concentrator marker can detect institute's selected frequency in this detecting time.
Step 104, the current selected tranmitting frequency of concentrator marker are set to the tranmitting frequency of self.
Be example with selected self the tranmitting frequency of concentrator marker A below.In the present embodiment, for concentrator marker is provided with 128 frequencies that transmit, so concentrator marker A need select the signal tranmitting frequency of the frequency of a free time as self from these 128 frequencies.
In implementation procedure shown in Figure 1, concentrator marker A can select a frequency Fi randomly, if this frequency has been taken by other concentrator markers, then concentrator marker A can sequentially select next frequency, and makes corresponding judgment.If all do not have the free time from 128 frequencies of frequency Fi to the of selecting at random, then concentrator marker A continues sequentially to select frequency to detect, till finding idle frequency from first frequency.Further, if these 128 frequencies are all occupied, then concentrator marker A will continue sequentially to select frequency to detect, till idle frequency is arranged.
For occupied frequency can be evenly distributed on these 128 frequencies as far as possible, concentrator marker A can also be after determining that first frequency F1 that self selects is occupied, produce a random frequency Fa, and with the value of the frequency number that concentrator marker had to F1 and Fa's and delivery, i.e. (F1+Fa) MOD128, second frequency F2 that the numerical value that obtains is selected as concentrator marker A, if selected second frequency F2 is also occupied, then adopt same model taking method to select the 3rd frequency, such as, produce a random frequency Fb again, and get (F2+Fb) MOD128, with the numerical value that obtains as selected the 3rd the frequency F3 of concentrator marker A, by that analogy, till finding idle frequency.
When adopting modulo operation to select frequency, can also set in advance a numerical value, if adopt the method for delivery to determine that the number of times of frequency has reached this numerical value, then afterwards can adopt sequential system to select frequency.Such as, default numerical value is 3, then concentrator marker A in the 3rd frequency of determining to obtain by modulo operation, also be the 4th frequency F4 selecting of concentrator marker A also occupied after, then concentrator marker A is initial frequency with F4, sequentially selects the frequency after the F4 to detect.128 frequencies are all occupied if concentrator marker A determines F4 to the, and then concentrator marker A begins detecting from first frequency again, till detecting idle frequency.
Concentrator marker A detect certain frequency Fi do not have occupied after, all select this frequency Fi for preventing two or more concentrator markers that start simultaneously, can also produce a nonce, i.e. stand-by period at random, after waiting time arrived, whether concentrator marker A detects this frequency Fi once more occupied, if still do not have occupied, then concentrator marker A broadcasts away with the identification information of self the broadcast signal transmission frequency of this frequency Fi as self by this frequency Fi; If this frequency Fi is taken by other concentrator markers, then concentrator marker A continues to select other frequency.Because the stand-by period that all concentrator markers produced all is at random, therefore, the stand-by period that the stand-by period that concentrator marker A is produced and other concentrator markers are produced generally can be not identical, like this, just can be so that two concentrator markers select for use the possibility of identical tranmitting frequency to become very little in the identical time, to guarantee the fastest frequency of selecting oneself of concentrator marker.
For guaranteeing that frequency Fi is only used by this concentrator marker, when concentrator marker A determines to adopt frequency Fi to come transmit its identification as the signal tranmitting frequency, can be earlier with the temporary signal tranmitting frequency of frequency Fi as concentrator marker A, and keep a period of time T that the signal of this frequency is detected, also used this frequency Fi if detect other concentrator markers in the period at this section, then concentrator marker A discharges this frequency Fi, and reselects the tranmitting frequency of this concentrator marker.Specifically, can whether can receive the broadcast singal of other concentrator markers in the time slot detecting that concentrator marker A transmits with frequency Fi emission, if in time T, received, then concentrator marker A determines that this frequency Fi is used by other concentrator markers, therefore discharge this frequency Fi, if no, then with the tranmitting frequency of this temporary signal tranmitting frequency as this concentrator marker.
In the process that concentrator marker A detects interim tranmitting frequency Fi, can also constantly produce random time skew, the time that transmits with translation concentrator marker A.Can solve like this because of concentrator marker A is identical with the time that other concentrator markers transmit, with own tranmitting frequency the problem of the broadcast singal of the concentrator marker that conflicts be arranged and cause concentrator marker A can't detect other in the gap that self transmits.
After frequency Fi is set to the formal signal tranmitting frequency of concentrator marker A, for the concentrator marker of avoiding other new startups adopts frequency Fi because of not detecting transmitting of concentrator marker A, around can also periodically detecting, concentrator marker A whether have other concentrator markers also to adopt frequency Fi to transmit.This method for detecting and concentrator marker A with Fi the method for detecting during as interim tranmitting frequency similar.Specifically, whether concentrator marker A can detect in the time slot that transmits has other concentrator markers to select frequency Fi, if detect certain concentrator marker, such as concentrator marker C, just transmit at frequency of utilization Fi, then concentrator marker A continues detecting a period of time to concentrator marker C.If in the period, concentrator marker A can not detect the signal of concentrator marker C with frequency Fi emission at this section, then concentrator marker A thinks that concentrator marker C has abandoned this frequency, so concentrator marker A continues with frequency Fi as own formal signal tranmitting frequency; If this section in the period concentrator marker A can both detect concentrator marker C and transmit with frequency Fi, then concentrator marker A think concentrator marker C do not receive oneself the emission broadcast singal, therefore, concentrator marker A abandons this frequency Fi automatically, and adopts preceding method to reselect the signal tranmitting frequency of oneself.Wherein, the reason that concentrator marker C does not receive the broadcast singal of concentrator marker A emission may be that the scope that signal covered of concentrator marker A emission is less, and concentrator marker C can't receive the broadcast singal of concentrator marker A emission.
In above-mentioned detecting process, if concentrator marker C and concentrator marker A are identical with the time that frequency Fi transmits, then concentrator marker A can't detect concentrator marker C, for avoiding the generation of this situation, concentrator marker A is when other concentrator markers of detecting, and the time of broadcast singal is launched in translation randomly self.
Can realize the frequency difference of different identification device broadcast singal in the same environment by such scheme.By such setting, be in identifier in this environment and just can detect which concentrator marker is arranged in the current environment by frequency hopping.Identifier is in the frequency hopping process, determine that according to the information of self preserving which concentrator marker is the concentrator marker relevant with self, afterwards, only the identification information that these concentrator markers relevant with self are broadcasted is periodically detected, and whether has left the environment that these concentrator markers were identified to judge self.The time that identifier is detected on each frequency should be longer than the time and the emission gap sum of concentrator marker transmit its identification.In fact, want identifier and in the time period that each frequency is discerned, identify the complete identification information that other concentrator markers that take this frequency are launched, then identifier must hear at least once the complete broadcast singal with this frequency emission in this recognition time section, so the recognition time section of identifier on each frequency should be no less than emission gap and twice concentrator marker transmit its identification time sum.
For concentrator marker, its signal cover has two, and one is the coverage with respect to concentrator marker, i.e. the range of signal that the signal of concentrator marker emission can be received by the another one concentrator marker is called the concentrator marker identification range with this coverage; Another is the coverage with respect to identifier, and promptly the signal of a concentrator marker emission can be called the identifier identification range with this coverage by the range of signal of an identifier reception.The concentrator marker identification range and the identifier identification range of concentrator marker can be represented with radius.Here the intensity of supposing the signal that all concentrator markers can receive and handle is identical, and the intensity of the signal that all identifiers can receive and handle is also identical.After having determined the intensity that concentrator marker transmits, the concentrator marker identification range of concentrator marker just depends on that concentrator marker receives and the intensity of processing signals, and is same, and the identifier identification range of concentrator marker just depends on that identifier receives and the intensity of processing signals.
If above two coverages are provided with improperly, the situation within the identifier identification range that identifier is in the identical concentrator marker correspondence of two or more tranmitting frequencies can appear, and this situation is referring to Fig. 2.Under situation shown in Figure 2, the concentrator marker identification range of supposing each concentrator marker is identical with the identifier identification range, i.e. 201 concentrator marker identification range that can reach for concentrator marker A simultaneously and identifier identification ranges, 202 concentrator marker identification range that can reach for concentrator marker B simultaneously and identifier identification ranges.Concentrator marker A and concentrator marker B all can't receive the signal of the other side's emission, so concentrator marker A can adopt identical tranmitting frequency with concentrator marker B.The common region of the 203 identifier coverages that can reach for concentrator marker A and concentrator marker B, if there is identifier R to be positioned at 203, and concentrator marker A is identical with the tranmitting frequency of concentrator marker B, having when both times of transmitting when overlapping, then identifier R can't identification marker A and the identification information launched of concentrator marker B.
For guaranteeing that identifier can not be in the pairing identifier identification range of the identical concentrator marker of two or more frequencies simultaneously, need the magnitude relationship between two signal covers of concentrator marker be provided with.Concentrator marker identification range that can concentrator marker is set to as far as possible greater than the identifier identification range, specifically, can receive and the strength range of processing signals be set to receive and the strength range of processing signals realizes greater than identifier by concentrator marker.When the concentrator marker identification range greater than the twice of identifier identification range or when above, if the identifier identification range of two concentrator markers has common region, then must have in these two concentrator markers within the concentrator marker identification range that is positioned at another.With Fig. 3 is example, the concentrator marker identification range of supposing each concentrator marker is the twice of identifier identification range, and the concentrator marker identification range of concentrator marker A is greater than the concentrator marker identification range of concentrator marker B, if between the identifier identification range 302 of the identifier identification range 301 of concentrator marker A and concentrator marker B common region 303 is arranged, then concentrator marker B one fixes within the concentrator marker identification range 304 of concentrator marker A.Like this, concentrator marker B is when selecting the tranmitting frequency of self, just can determine the employed frequency of concentrator marker A by the signal that receives concentrator marker A emission, in order to avoid self and concentrator marker A use identical tranmitting frequency, thus the frequency interference issue can avoid the identifier identification range of two concentrator markers overlapping effectively the time.
The above only is the present invention program's preferred embodiment, not in order to limit protection scope of the present invention.
Claims (12)
1, a kind of wireless device is selected the method for tranmitting frequency automatically, it is characterized in that, sets in advance the tranmitting frequency set that wireless device can be used, and this method further may further comprise the steps:
A. wireless device is selected a tranmitting frequency from the tranmitting frequency set that sets in advance;
B. whether wireless device self receives by judging whether detect current selected tranmitting frequency with the broadcast message of current selected frequency emission occupied, if occupied, then reselect a tranmitting frequency, and execution in step b again, otherwise, enter step c;
C. with the tranmitting frequency of current selected tranmitting frequency as self broadcast message.
2, method according to claim 1 is characterized in that among the described step a, described wireless device is select transmit frequency at random, and among the described step b, the described tranmitting frequency of reselecting is reselected for adopting sequential system.
3, method according to claim 1, it is characterized in that among the described step a, described wireless device is select transmit frequency at random, among the described step b, the described tranmitting frequency of reselecting is: wireless device is selected a random frequency again, and with the tranmitting frequency number in the tranmitting frequency set to current occupied tranmitting frequency and this random frequency sum delivery, with the numerical value that obtains as the tranmitting frequency of reselecting.
4, method according to claim 3, it is characterized in that this method further comprises: set in advance the delivery number of times, among the described step b, described wireless device is when reselecting tranmitting frequency, judge that at first whether the number of times with delivery mode select transmit frequency has exceeded default delivery number of times, if do not exceed, then continues with delivery mode select transmit frequency, if exceed, then adopt the sequential system select transmit frequency.
5,, it is characterized in that this method further comprises:, then begin selective sequential again from first tranmitting frequency if all tranmitting frequencies of wireless device selective sequential are all occupied according to claim 2 or 4 described methods.
6, method according to claim 1 is characterized in that described step c further comprises:
Wireless device random wait a period of time, self whether receive by judging whether detect current selected tranmitting frequency with the broadcast message of current selected frequency emission occupied afterwards, if it is occupied, then reselect a tranmitting frequency, and execution in step b again, otherwise, with the tranmitting frequency of current selected tranmitting frequency as self broadcast message.
7, method according to claim 1 is characterized in that, further comprises after the described step c:
Wireless device uses current selected tranmitting frequency broadcast message, and to this tranmitting frequency continuation detecting a period of time, there are other wireless devices outside this wireless device to use this tranmitting frequency if find, then this wireless device discharges this tranmitting frequency, reselect a tranmitting frequency afterwards, and execution in step b again; If no, then continue to use current selected tranmitting frequency to come broadcast message.
8, method according to claim 1 is characterized in that, further comprises after the described step c:
Wireless device uses current selected tranmitting frequency broadcast message, and periodically detects other wireless devices that whether have outside this wireless device and use the tranmitting frequency of self, if do not have, then continues to use this tranmitting frequency to come broadcast message; If have, then this tranmitting frequency is continued detecting a period of time, if this tranmitting frequency is used by other wireless devices outside this wireless device in this detecting time, then this wireless device discharges this tranmitting frequency, reselect a tranmitting frequency afterwards, and execution in step b again, otherwise, continue to use this tranmitting frequency to come broadcast message.
9, according to claim 7 or 8 described methods, it is characterized in that, whether described wireless device has the tranmitting frequency of other wireless devices uses self outside this wireless device in the detecting of the gap of broadcast singal, this method further comprises: wireless device is in the detecting process, and random offset self is launched the time of broadcast message.
10, method according to claim 1 is characterized in that, described wireless device is the concentrator marker that is used to identify physical object, and this method further comprises:
The identifier that is used for identification marker is determined the concentrator marker relevant with self by frequency hopping, and periodically detects the broadcast message of this concentrator marker emission.
11, method according to claim 10, it is characterized in that, when described identifier is determined the concentrator marker relevant with self by frequency hopping, the recognition time of each frequency is no less than the off time of concentrator marker broadcast message and the concentrator marker broadcast message time sum of twice.
12, method according to claim 10 is characterized in that this method further comprises:
The strength range that concentrator marker reception and processing signals are set receives the also strength range of processing signals greater than identifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101023479A CN100474952C (en) | 2003-10-23 | 2003-10-23 | Method for automatic selecting transmitting frequency of radio equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101023479A CN100474952C (en) | 2003-10-23 | 2003-10-23 | Method for automatic selecting transmitting frequency of radio equipment |
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| CN1610427A true CN1610427A (en) | 2005-04-27 |
| CN100474952C CN100474952C (en) | 2009-04-01 |
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| CNB2003101023479A Expired - Fee Related CN100474952C (en) | 2003-10-23 | 2003-10-23 | Method for automatic selecting transmitting frequency of radio equipment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100452661C (en) * | 2006-04-04 | 2009-01-14 | 广州矽金塔电子有限公司 | Automatic radio audio-frequency transmission method based on FM frequency-modulation technology |
| CN103369609A (en) * | 2013-07-29 | 2013-10-23 | 海能达通信股份有限公司 | Communication mode switching method and device |
| CN105025550A (en) * | 2014-04-16 | 2015-11-04 | 上海诺司纬光电仪器有限公司 | Wireless frequency hopping scanning method |
-
2003
- 2003-10-23 CN CNB2003101023479A patent/CN100474952C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100452661C (en) * | 2006-04-04 | 2009-01-14 | 广州矽金塔电子有限公司 | Automatic radio audio-frequency transmission method based on FM frequency-modulation technology |
| CN103369609A (en) * | 2013-07-29 | 2013-10-23 | 海能达通信股份有限公司 | Communication mode switching method and device |
| CN103369609B (en) * | 2013-07-29 | 2017-02-08 | 海能达通信股份有限公司 | Communication mode switching method and device |
| US9814041B2 (en) | 2013-07-29 | 2017-11-07 | Hytera Communications Corp., Ltd. | Communication mode switching method and device |
| CN105025550A (en) * | 2014-04-16 | 2015-11-04 | 上海诺司纬光电仪器有限公司 | Wireless frequency hopping scanning method |
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|---|---|
| CN100474952C (en) | 2009-04-01 |
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