CN101203009B - Double module terminal and method for obtaining timing base relationship - Google Patents
Double module terminal and method for obtaining timing base relationship Download PDFInfo
- Publication number
- CN101203009B CN101203009B CN2007103036556A CN200710303655A CN101203009B CN 101203009 B CN101203009 B CN 101203009B CN 2007103036556 A CN2007103036556 A CN 2007103036556A CN 200710303655 A CN200710303655 A CN 200710303655A CN 101203009 B CN101203009 B CN 101203009B
- Authority
- CN
- China
- Prior art keywords
- reference mode
- frame
- time
- mode
- register
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The invention discloses a double-mode terminal and an acquisition method of time base relationship. The method comprises the steps: A. at the moment of a frame interrupt of a basis mode, a second register is used for latching a time base difference between the basis mode and a non-basis mode; at the moment of the frame interrupt of the non-basis mode, a first register is used for latching a time base difference of the second register; B. according to a frame number FN of the basis mode, a frame number SSFN of the non-basis mode, a first register latch value T1, a second register latch value T2, an adjustment quantity Delta of the frame interrupt of the basis mode and an ultimate latch delay D of two registers at the moment of sampling, the time base relationship between the basis mode andthe non-basis mode is determined. The invention lists out five corresponding relations of GSM frame and TDD-LCR frame one by one and provides a method for determining every corresponding relation, sothe time base relationship between the two modes can be positioned accurately and flexibly and GSM /TDD-LCR automatic double-mode is favored to be realized.
Description
Technical field
The present invention relates to moving communicating field, particularly relate to a kind of dual-mode terminal and time-base relationship acquisition methods thereof.
Background technology
Second generation mobile communications network GSM/GPRS and CDMA (2G) used since the eighties, develop into now, whole world mobile subscriber's sum has reached more than 1,000,000,000 families, and along with the continuous increase of user to business demand, existing second generation mobile communication system has been difficult to satisfy the requirement of high-speed data.Simultaneously, it is the 3-G (Generation Three mobile communication system) (3G) of standard that mobile communication technology has developed into WCDMA, TD-SCDMA and CDMA2000 from the existing second generation, 3-G (Generation Three mobile communication system) satisfies the quality of service request of mass data business, and improved network capacity, support to multimedia service, is with a wide range of applications from the speech to the grouped data.
The radio protocol stack layer of 3G (Third Generation) Moblie network is compared with the radio protocol stack layer of second generation mobile communications network, and it alters a great deal, and this mainly is because very big variation has taken place air interface.What second generation mobile communication system GSM/GPRS adopted is Frequency Division Duplexing (FDD) (FDD) time division multiple access mechanism; And WCDMA introduces the mechanism of code division multiple access (CDMA) in the 3-G (Generation Three mobile communication system) on the basis of GSM/GPRS, and TD-SCDMA adopts the mechanism of time division duplex (TDD), time division multiplexing and code division multiple access.
At present, 3G (Third Generation) Moblie network (3G) has obtained a large amount of research, and commercial application has been arranged, but existing second generation mobile communication system (2G) is widespread usage in the whole world, so, in very long a period of time in future, second generation mobile communication system will and be deposited with the 3G (Third Generation) Moblie network, the zone of the overlapping covering of plurality of communication systems therefore can occur.
Because existing cordless communication network; very big difference is all arranged from the physical layer to the upper-layer protocol technically; mobile operator is in order to save the cost of laying network; hope can be from existing network to other network agile transition; mixed networking, for the terminal use provides service, and mobile phone users wishes can both obtain no matter thereunto normal service; so mobile terminal multi-mode changes into the trend into the terminal development.
For bimodulus or multimode terminal, when under a pattern, working, monitor the adjacent sub-district of another pattern, promptly the adjacent sub-district of another pattern is done operations such as measurement or read apparatus message.Because the frame length of different mode is different, wants the dual-mode terminal operate as normal, coordinates the problem of two frame synchronization between the system with regard to needs.For example, for the GSM/TDD-LCR dual-mode terminal, when terminal is worked under the GSM pattern, according to the needs of measuring etc., when do the measurement of LCR, terminal will know that position that the frame of next TDD-LCR interrupts somewhere, scheduling that could be correct like this, in like manner, when terminal works in TD-SCDMA pattern following time, also need the position of knowing that the GSM frame interrupts.That is to say that need obtain the time-base relationship of two patterns, described time-base relationship comprises: the relation of two absolute frame numbers of pattern at a time, and the numerical relation between two mode time reference counters.
Therefore, how to provide a kind of time-base relationship acquisition methods of dual-mode terminal just to become the technical problem that needs to be resolved hurrily.
Summary of the invention
Technical problem to be solved by this invention provides a kind of dual-mode terminal and time-base relationship acquisition methods thereof.
For solving the problems of the technologies described above, it is as follows to the invention provides technical scheme:
A kind of time-base relationship acquisition methods of dual-mode terminal comprises the steps:
A, interrupt constantly, utilize second register to latch time basis between reference mode and the non-reference mode at the frame of reference mode; Interrupt constantly at the frame of non-reference mode, utilize first register to latch time basis in this second register;
B, according to the adjustment amount δ that interrupts at frame number SSFN, the first register latched value T1 of the frame number FN of sampling instant reference mode, non-reference mode, the second register latched value T2, reference mode frame, and the maximum of two registers latchs time delay D, determines the time-base relationship between described reference mode and the non-reference mode.
Preferably, among the step B, when T1 is not equal to T2, determine that the time-base relationship between described reference mode and the non-reference mode is: the T2 moment of the SSFN frame of non-reference mode is corresponding to the δ moment of the FN frame of reference mode.
Preferably, among the step B, equal the T1 that former frame is read at T1, and during D＜T1＜FL-D, determine that the time-base relationship between described reference mode and the non-reference mode is: the T1 moment of the SSFN-2 frame of non-reference mode is corresponding to the δ moment of the FN frame of reference mode, wherein, FL is the frame length of non-reference mode.
Preferably, among the step B, equal T2 at T1, and T1 is not equal to the T1 that former frame is read, and during D＜T1＜FL-D, determine that the time-base relationship between described reference mode and the non-reference mode is: the T1 moment of the SSFN-1 frame of non-reference mode, wherein, FL was the frame length of non-reference mode corresponding to the δ moment of the FN frame of reference mode.
Preferably, described reference mode is the GSM pattern, shown in non-reference mode be the TDD-LCR pattern.
A kind of dual-mode terminal comprises:
Second register is used for interrupting latching the time basis between reference mode and the non-reference mode constantly at the frame of reference mode;
First register is used for interrupting latching the time basis in this second register constantly at the frame of non-reference mode;
The time-base relationship computing unit, be used for: according to the adjustment amount δ that interrupts at frame number SSFN, the first register latched value T1 of the frame number FN of sampling instant reference mode, non-reference mode, the second register latched value T2, reference mode frame, and the maximum of two registers latchs time delay D, determines the time-base relationship between described reference mode and the non-reference mode.
Beneficial effect of the present invention is:
The present invention lists five kinds of corresponding relations of GSM frame and TDD-LCR frame one by one, and the method for determining various corresponding relations is provided, and can orient to accurate and flexible two time-base relationships between the pattern, helps realizing the automatic bimodulus of GSM/TDD-LCR.
Description of drawings
Fig. 1 is the flow chart of the time-base relationship acquisition methods of the dual-mode terminal of preferred embodiment of the present invention;
Fig. 2 is the time-base relationship schematic diagram of GSM/TDD-LCR in the preferred embodiment of the present invention;
Fig. 3 is in the preferred embodiment of the present invention, first kind of situation schematic diagram of the corresponding relation of GSM frame and TDD-LCR frame;
Fig. 4 is in the preferred embodiment of the present invention, second kind of situation schematic diagram of the corresponding relation of GSM frame and TDD-LCR frame;
Fig. 5 is in the preferred embodiment of the present invention, the third situation schematic diagram of the corresponding relation of GSM frame and TDD-LCR frame;
Fig. 6 is in the preferred embodiment of the present invention, the 4th kind of situation schematic diagram of the corresponding relation of GSM frame and TDD-LCR frame;
Fig. 7 is in the preferred embodiment of the present invention, the 5th kind of situation schematic diagram of the corresponding relation of GSM frame and TDD-LCR frame;
A realization flow schematic diagram of Fig. 8 the inventive method.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, describe the present invention below in conjunction with the accompanying drawings and the specific embodiments.
Please refer to Fig. 1, the time-base relationship acquisition methods of the dual-mode terminal of preferred embodiment of the present invention mainly comprises the steps:
Correspondingly, the dual-mode terminal of preferred embodiment of the present invention comprises first register, second register and time-base relationship computing unit.In sampling instant, time-base relationship computing unit (can by software, hardware or software and hardware combined finishing) reads the adjustment amount δ that frame number SSFN, the first register latched value T1, the second register latched value T2, the reference mode frame of the frame number FN of reference mode, non-reference mode interrupt, and the maximum of two registers latchs time delay D, determines time-base relationship between described reference mode and the non-reference mode according to the FN that reads, SSFN, T1, T2, δ and D.Wherein, FN, SSFN, δ and D provide by high level.Analyze theoretically, if obtained the time-base relationship of a certain moment two patterns, the time-base relationship of any time can obtain by calculating thereafter.
Below be example with the GSM/TDD-LCR bimodulus, wherein GSM is a reference mode, TDD-LCR is non-reference mode, and the process of the time-base relationship that obtains certain two pattern constantly among the present invention is described.Be understandable that basic principle of the present invention is also applicable to the dual-mode terminal and the multimode terminal of other type.
As shown in Figure 2, interrupt (being that the GSM time base counter is 0) constantly, the time base counter value T2 of TDD-LCR is latched among the REG2 at each GSM frame.Interrupt constantly the value among the REG2 being copied among the REG1 at each TDD-LCR frame.The subframe of TDD-LCR is long to be 5ms, GSM frame length 4.615ms.Two each corresponding time reference counter of pattern, the TDD-LCR time reference counter is with 1/8 chip (chip) the precision counting of TDD-LCR, and 5ms is 0x0～0xC7FF; The GSM time reference counter is counted with 1/4 bit accuracy, and 4.615ms is 0x0～0x1387.
In real system, latch T1 and all can have certain time delay (for example, maximum delay is D) with the process that latchs T2.This make when the GSM frame interrupt with the TDD-LCR frame interrupt very near the time when (the frame interruption differs smaller or equal to D), as shown in phantom in Figure 2, REG2 may latch a value that is equal to or slightly less than the TDD-LCR frame length; Also may be latched into one and equal or be slightly larger than 0 value.And REG1 may be latched into REG2 change value T2 (n-1) before; Also may be latched into REG2 change value T2 (n) afterwards.
In addition, in real system, reference mode (GSM) may some the time be elongated, promptly be not equal to 4.615ms.But two total frame lengths of continuous reference mode equal former frame length * 2, and in the following analysis, the adjustment amount of establishing the interruption of GSM frame is δ.This makes in any TDD-LCR frame, may occur: do not have the GSM frame to interrupt, have a GSM frame to interrupt, have two GSM frames to interrupt.
So, when carrying out time-base relationship calculating, need to consider following factor:
(1) TDD-LCR interrupt and sampling instant between have or not GSM to interrupt, if having, then the latched value of REG1 is not equal to the latched value of REG2, promptly T1!=T2, otherwise the latched value of REG1 equals the latched value of REG2, i.e. T1=T2;
(2) frame length of GSM is adjustable, for example when receiving SCH (synchronizing channel), so under this situation, the expansion frame length of GSM may be greater than the frame length of TDD-LCR;
(3) in position that the frame of each TDD-LCR interrupts, TDD-LCR need copy the value of REG2 (T2) to REG1 (T1), but this copy has time-delay, in the time period of this time-delay, the frame that may have new GSM interrupts taking place, so the value of T2 can change.
After considering above-mentioned factor, the corresponding relation that can draw between GSM frame and the TDD-LCR frame comprises following 5 kinds of situations.
Situation one:
As shown in Figure 3, last the GSM frame before the sampling instant interrupts occurring in before the previous TDD-LCR frame interruption.Under this situation, T1=T2, and the span of T1, T2 is that (0+D, 5-D), and the T1 that reads at the TDD-LCR present frame and former frame read T1 and equate, i.e. T1 (SSFN)=T1 (SSFN-1).
If the adjustment amount of GSM FN frame length is δ, at this moment the time-base relationship of TDD-LCR and GSM frame is: the T1 of the SSFN-2 frame of TDD-LCR constantly corresponding to the δ of the FN frame of GSM constantly, promptly (SSFN-2, T1)=(FN, δ).
Situation two:
As shown in Figure 4, last the GSM frame before the sampling instant interrupts occurring near the previous TDD-LCR frame interruption.Under this situation, T1=T2, and T1, T2 span are adjacent two frames [5-D, 5] and [0,0+D].
If the adjustment amount that GSM FN frame interrupts is δ, at this moment the time-base relationship of TDD-LCR and GSM frame is:
If 5-D≤T1≤5, (SSFN-2, T1)=(FN, δ);
If 0≤T1≤0+D, (SSFN-1, T1)=(FN, δ).
But, so at this moment, can't differentiate the corresponding relation of TDD-LCR and GSM frame because can't distinguish situation two and situation four.
Situation three:
As shown in Figure 5, last the GSM frame before the sampling instant interrupts occurring between this TDD-LCR frame interrupts and last time the TDD-LCR frame interrupted.Under this situation, T1=T2, and T1, T2 span be (0+D, 5-D), and the T1 that reads at the TDD-LCR present frame and former frame to read T1 unequal, i.e. T1 (SSFN)!=T1 (SSFN-1).
If the adjustment amount that GSM FN frame interrupts is δ, at this moment the time-base relationship of TDD-LCR and GSM frame is: (SSFN-1, T1)=(FN, δ).
Situation four:
As shown in Figure 6, last the GSM frame before the sampling instant interrupts occurring near this TDD-LCR frame interruption.Under this situation, the relation of T1 and T2 is uncertain, and the scope of T2 is adjacent two frames [5-D, 5] and [0,0+D].
Because can't distinguish situation two and situation four, so at this moment, can't differentiate the corresponding relation of TDD-LCR and GSM frame.
Situation five:
As shown in Figure 7, last the GSM frame before the sampling instant interrupts occurring between this TDD-LCR frame interruption and the sampling instant.Under this situation, T1!=T2, and T2＞(0+D).
If the adjustment amount that GSM FN frame interrupts is δ, at this moment the time-base relationship of TDD-LCR and GSM frame is: (SSFN, T2)=(GSM, δ).
At above-mentioned five kinds of situations, provide a realization flow of the inventive method below.
As shown in Figure 8, this flow process comprises:
At first, read frame number SSFN, the first register latched value T1, the second register latched value T2 of the frame number FN of reference mode, non-reference mode, the adjustment amount δ that the reference mode frame interrupts, and the maximum of two registers latchs time delay D;
Then, judge that whether the T1 value that T1 value and former frame are read equates, according to comparative result, carries out different operations, that is:
When the T1 value of reading in T1 value and former frame equates, judge further whether T1 satisfies: D＜T1＜5-D, if, then can determine (SSFN-2, T1)=(FN, δ), otherwise, abandon carrying out obtaining of time-base relationship at this frame;
When the T1 value of reading in T1 value and former frame is unequal, judge further whether T1 equals T2, if T1 is not equal to T2, then can determine (SSFN, T2)=(FN, δ), if T1 equals T2, judge further more whether T1 satisfies: D＜T1＜5-D, if then can determine (SSFN-1, T1)=(FN, δ), otherwise, abandon carrying out obtaining of time-base relationship at this frame.
Need to prove, the flow process that Fig. 8 provides only is one embodiment of the present of invention, in other embodiments, can adjust T1 and preceding frame T1 comparison and T1 and T2 order relatively, can also suitably simplify this algorithm, as abandon all T1 and the unequal situation of preceding frame T1.
The present invention lists five kinds of corresponding relations of GSM frame and TDD-LCR frame one by one, and the method for determining various corresponding relations is provided, and can orient to accurate and flexible two time-base relationships between the pattern, helps realizing the automatic bimodulus of GSM/TDD-LCR.
Should be noted that at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the spiritual scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (4)
1. the time-base relationship acquisition methods of a dual-mode terminal is characterized in that, comprises the steps:
A, interrupt constantly, utilize second register to latch time basis between reference mode and the non-reference mode at the frame of reference mode; Interrupt constantly at the frame of non-reference mode, utilize first register to latch time basis in this second register;
B, according to the adjustment amount δ that interrupts at frame number SSFN, the first register latched value T1 of the frame number FN of sampling instant reference mode, non-reference mode, the second register latched value T2, reference mode frame, and the maximum of two registers latchs time delay D, determine the time-base relationship between described reference mode and the non-reference mode, wherein:
When T1 is not equal to T2, determine that the time-base relationship between described reference mode and the non-reference mode is: the T2 moment of the SSFN frame of non-reference mode is corresponding to the δ moment of the FN frame of reference mode;
Equal the T1 that former frame is read at T1, and during D＜T1＜FL-D, determine that the time-base relationship between described reference mode and the non-reference mode is: the T1 moment of the SSFN-2 frame of non-reference mode, wherein, FL was the frame length of non-reference mode corresponding to the δ moment of the FN frame of reference mode;
Equal T2 at T1, and T1 is not equal to the T1 that former frame is read, and during D＜T1＜FL-D, determine that the time-base relationship between described reference mode and the non-reference mode is: the T1 of the SSFN-1 frame of non-reference mode constantly corresponding to the δ of the FN frame of reference mode constantly.
2. the method for claim 1 is characterized in that:
Described reference mode is the GSM pattern, shown in non-reference mode be the TDD-LCR pattern.
3. a dual-mode terminal is characterized in that, comprising:
Second register is used for interrupting latching the time basis between reference mode and the non-reference mode constantly at the frame of reference mode;
First register is used for interrupting latching the time basis in this second register constantly at the frame of non-reference mode;
The time-base relationship computing unit, be used for: according to the adjustment amount δ that interrupts at frame number SSFN, the first register latched value T1 of the frame number FN of sampling instant reference mode, non-reference mode, the second register latched value T2, reference mode frame, and the maximum of two registers latchs time delay D, determine the time-base relationship between described reference mode and the non-reference mode, wherein:
When T1 is not equal to T2, determine that the time-base relationship between described reference mode and the non-reference mode is: the T2 moment of the SSFN frame of non-reference mode is corresponding to the δ moment of the FN frame of reference mode;
Equal the T1 that former frame is read at T1, and during D＜T1＜FL-D, determine that the time-base relationship between described reference mode and the non-reference mode is: the T1 moment of the SSFN-2 frame of non-reference mode, wherein, FL was the frame length of non-reference mode corresponding to the δ moment of the FN frame of reference mode;
Equal T2 at T1, and T1 is not equal to the T1 that former frame is read, and during D＜T1＜FL-D, determine that the time-base relationship between described reference mode and the non-reference mode is: the T1 of the SSFN-1 frame of non-reference mode constantly corresponding to the δ of the FN frame of reference mode constantly.
4. dual-mode terminal as claimed in claim 3 is characterized in that:
Described reference mode is the GSM pattern, shown in non-reference mode be the TDD-LCR pattern.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007103036556A CN101203009B (en) | 2007-12-20 | 2007-12-20 | Double module terminal and method for obtaining timing base relationship |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007103036556A CN101203009B (en) | 2007-12-20 | 2007-12-20 | Double module terminal and method for obtaining timing base relationship |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101203009A CN101203009A (en) | 2008-06-18 |
| CN101203009B true CN101203009B (en) | 2010-11-10 |
Family
ID=39517921
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007103036556A Active CN101203009B (en) | 2007-12-20 | 2007-12-20 | Double module terminal and method for obtaining timing base relationship |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101203009B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104735772B (en) * | 2013-12-23 | 2018-08-03 | 联芯科技有限公司 | A kind of device and method of Timing Synchronization |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6925112B1 (en) * | 2002-07-26 | 2005-08-02 | Jabil Circuit, Inc. | Discrete multitone modem initialization system and method |
| US6956852B1 (en) * | 1999-06-25 | 2005-10-18 | Cisco Technology Inc. | Multi-function high-speed network interface |
| CN1774948A (en) * | 2003-04-24 | 2006-05-17 | 日本电气株式会社 | Method of time and frequency synchronization of multimode terminal |
| CN1997193A (en) * | 2006-12-22 | 2007-07-11 | 北京天碁科技有限公司 | An acquisition method for multi-mode frame difference and multi-mode handset |
| CN101051877A (en) * | 2007-05-11 | 2007-10-10 | 北京天碁科技有限公司 | Method and device for obtaining time-base relationship in multiple mode mobile communication |
-
2007
- 2007-12-20 CN CN2007103036556A patent/CN101203009B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6956852B1 (en) * | 1999-06-25 | 2005-10-18 | Cisco Technology Inc. | Multi-function high-speed network interface |
| US6925112B1 (en) * | 2002-07-26 | 2005-08-02 | Jabil Circuit, Inc. | Discrete multitone modem initialization system and method |
| CN1774948A (en) * | 2003-04-24 | 2006-05-17 | 日本电气株式会社 | Method of time and frequency synchronization of multimode terminal |
| CN1997193A (en) * | 2006-12-22 | 2007-07-11 | 北京天碁科技有限公司 | An acquisition method for multi-mode frame difference and multi-mode handset |
| CN101051877A (en) * | 2007-05-11 | 2007-10-10 | 北京天碁科技有限公司 | Method and device for obtaining time-base relationship in multiple mode mobile communication |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101203009A (en) | 2008-06-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101159964B (en) | Measurement scheduling method of multimode terminal and the multimode terminal | |
| US20050116783A1 (en) | Phase detector for a programmable clock synchronizer | |
| CN104349464B (en) | The method and apparatus for send synchronizing signal, determining carrier type | |
| Mitra et al. | Analysis of a kanban discipline for cell coordination in production lines. I | |
| CN1968049B (en) | Synchronization method and device after terminal dormancy awaken of TD_SCDMA mobile phone | |
| CN100426275C (en) | Bus interface devices and method | |
| CN101242230B (en) | Clock synchronization aid device and associated clock synchronization device, main communication station and secondary communication station | |
| CN101534230A (en) | A method for sending data based on Ethernet, Ethernet nodes and a control system | |
| DE60137546D1 (en) | SYNCHRONIZING ASYNCHRONOUS NETWORKS THROUGH THE USE OF SYNCHRONIZATION SYMBOLS IN THE ACCESS CONTROL LAYER (MAC) | |
| CN100527897C (en) | Multi-mode mobile terminal time schedule controller and method | |
| CN101889406A (en) | Communication device and method for synchronisation | |
| CN111193567B (en) | Time synchronization method, equipment and storage medium | |
| CN105306159A (en) | Clock timestamp compensation method and clock timestamp compensation device | |
| Bhadra et al. | A low power UART design based on asynchronous techniques | |
| CN101203009B (en) | Double module terminal and method for obtaining timing base relationship | |
| CN109543811B (en) | Counting circuit, counting method and chip | |
| CN105392144A (en) | Method and apparatus for multiplexing channel of unlicensed frequency band | |
| WO2023241247A1 (en) | Bwp switching method and apparatus, terminal, storage medium and product | |
| CN102232274A (en) | Synchronization device, reception device, synchronization method, and reception method | |
| CN101541074B (en) | Calculation method of timing relationship between GSM/TD dual-mode terminal systems | |
| CN111488311A (en) | Clock SoC chip with high integration level | |
| CN110572294A (en) | SSM information processing time delay testing method | |
| CN102394808A (en) | Method and apparatus for phase adaption and frame alignment of serial media independent interface of ethernet network | |
| CN108021081A (en) | The playback test method controlled based on WLAN and sample time domain | |
| CN100358383C (en) | Method of improving preciseness of mobile communication terminal low frequency crystal oscillator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |