CN1812289A - Apparatus for realizing network synchronization in personal cell phone based on IP - Google Patents
Apparatus for realizing network synchronization in personal cell phone based on IP Download PDFInfo
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- CN1812289A CN1812289A CN 200510002907 CN200510002907A CN1812289A CN 1812289 A CN1812289 A CN 1812289A CN 200510002907 CN200510002907 CN 200510002907 CN 200510002907 A CN200510002907 A CN 200510002907A CN 1812289 A CN1812289 A CN 1812289A
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Abstract
This invention discloses a kind of device for achieving network synchronization in personal handset system based on IP. The device is positioned in the base station equipment. The said controller generates controlling instruction and transmits to phase-lock processor; the phase-lock processor receives the data signal coming from the clock adjusting execution module. It transmits the clock adjusting signal to the clock adjusting execution module and transmits the locking identification signal to the controller; the device also concludes global positioning system module, which outputs second clock signal to the said clock adjusting execution module. This invention can achieve that carrier waves of the transmitting equipment and receiving equipment, which are in the personal handset system based on IP, are synchronous in terms of time. The cost is low too.
Description
Technical field
The present invention relates to the personal hand held phone system in the wireless communication field, especially relate to a kind of based on the device of realizing Network Synchronization in the personal hand held phone system of IP (Internet protocol).
Background technology
Present PHS system (Personal Handyphone System personal hand held phone system, claim wireless local telephone system again), as shown in Figure 1, include the network equipment, base station controller and base station, the E1 of the network equipment (the European transfer of data universal standard) signal directly is sent to base station controller, the network clocking signal is sent to the base station by the circuit of base station controller and base station, and its wireless access way is TDMA/TDD (TDMA/TDD).In order to guarantee system's operate as normal, this access way requires the necessary in time strict synchronism of the carrier wave of transmitting apparatus and accepting device, otherwise will cause normally demodulation of signal; Since all end station according to the time a merotype public control frequency, so require the carrier wave between transmitting apparatus in time also must strict synchronism simultaneously, otherwise can cause the mutual interference of channel phase and reduce service quality.Current domestic PHS system obtains the synchronous regime that synchronised clock is kept transmitting apparatus by SDH (synchronous digital hierarchy) from network side.
At present, in new PHS network system of building, Network Transmission can be based upon on the IP network such as metropolitan area network.Owing in IP network, can't extract network clock source accurately, therefore can't obtain reliable synchronised clock, make that the carrier wave of transmitting apparatus and accepting device is asynchronous in time, this will cause system's cisco unity malfunction.So, in IP-based network transmission, how on the basis of the cost that less input, realize that a plurality of transmitting apparatus are a critical problem synchronously.
Summary of the invention
The technical issues that need to address of the present invention provide the device of realizing Network Synchronization in a kind of IP-based personal hand held phone system, utilize the present invention can realize that the carrier wave of transmitting apparatus and accepting device is synchronous in time in the IP-based personal hand held phone system, and with low cost.
In order to solve the problems of the technologies described above, the invention provides the device of realizing Network Synchronization in a kind of IP-based personal hand held phone system, this device is arranged in base station equipment, include controller, phase-locked processor and clock and adjust Executive Module, described controller produces control command, and is sent to phase-locked processor; This phase-locked processor receives and comes from the data-signal that clock is adjusted Executive Module, and transmission clock adjustment signal to clock is adjusted Executive Module, and send the locking id signal to controller, this device also includes GPS module, and this GPS module output second clock signal to described clock is adjusted Executive Module.
Further, the present invention also has following characteristics: described clock adjustment signal includes the digital-to-analogue control signal and increases button pulse controlled flag signal.
Further, the present invention also has following characteristics: described clock is adjusted Executive Module and is included counting frequency unit, voltage controlled oscillator and digital to analog converter, the counting frequency unit clock signal second, the clock signal and the increasing of described phase-locked processor of voltage controlled oscillator of receiving world locational system module output is respectively detained pulse controlled flag signal, and send data-signal, and send the digital-to-analogue conversion data to digital to analog converter to described phase-locked processor; Described digital to analog converter receives the digital-to-analogue control signal of phase-locked processor and the digital-to-analogue conversion data of counting frequency unit, and output control voltage signal is to voltage controlled oscillator.
Further, the present invention also has following characteristics: described counting frequency unit is used for the clock signal of voltage controlled oscillator is carried out frequency division, and generates the divided pulse signal, and the pulse in 1 second is counted to the divided pulse signal.
Further, the present invention also has following characteristics: the data-signal that described counting frequency unit is sent to phase-locked processor includes second clock marking signal and to the counted number of pulses of divided pulse signal in 1 second.
Further, the present invention also has following characteristics: described phase-locked processor is realized by digital signal processor; Described frequency-dividing counter is realized by field programmable gate array.
Further, the present invention also has following characteristics: the control command that described controller produces includes locking enabled instruction and lock-in threshold instruction.
Compared with prior art, the present invention has the following advantages:
Because the accurate second clock that the whole world that the present invention utilizes global positioning system to provide is consistent, clock signal on each base station equipment in the IP-based personal hand held phone system is adjusted, the carrier wave of guaranteeing transmitting apparatus and accepting device is synchronous in time, and with low cost.
Description of drawings
Fig. 1 is the system model figure of traditional personal hand held phone system;
Fig. 2 is the system model figure of the residing IP-based personal hand held phone system of the present invention;
Fig. 3 the present invention is based on the structural representation block diagram of realizing the device of Network Synchronization in the personal hand held phone system of IP.
Embodiment
For understanding the device of realizing Network Synchronization in the personal hand held phone system that the present invention is based on IP in depth, the present invention is described in detail below in conjunction with drawings and the specific embodiments.
As Fig. 2, shown in Figure 3, the residing IP-based personal hand held phone system of the present invention is a utilization IPMUX equipment on the basis of traditional personal hand held phone system, extend on the IP network with the business that realizes the PHS system, include the network equipment, base station controller, base station, IPMUX equipment and IP network, this IPMUX equipment is a kind of TDMoIP (carrying TDM business on IP network) gateway device, can be implemented in by it and extend synchronous TDM business on the IP network.At transmitting terminal, after equipment obtains data flow and is converted into packets of information by e1 port in transmission over networks; At receiving terminal, equipment is changed back the E1 business model with the IP packets of information.
The present invention is based on the device of realizing Network Synchronization in the personal hand held phone system of IP, this device is arranged in base station equipment, includes controller, phase-locked processor, clock and adjusts Executive Module and global positioning system (GPS) module.Described controller produces control command, and this control command includes locking enabled instruction and lock-in threshold instruction, and is sent to phase-locked processor; This phase-locked processor receives and comes from the data-signal that clock is adjusted Executive Module, and transmission clock adjustment signal to clock is adjusted Executive Module, this clock adjustment signal includes the digital-to-analogue control signal and increases button pulse controlled flag signal, in addition, phase-locked processor also sends the locking id signal to controller, shows that a phase-locked cycle finishes; The extremely described clock of clock signal second of described GPS module output global synchronization is adjusted Executive Module.
Clock is adjusted Executive Module and is included counting frequency unit (counter/frequency divider), voltage controlled oscillator and digital to analog converter, the counting frequency unit is clock signal second of receiving world locational system module output respectively, pulse controlled flag signal is detained in increasing of the clock signal of voltage controlled oscillator and described phase-locked processor, and the clock signal of voltage controlled oscillator carried out frequency division, and generation divided pulse signal, and to the divided pulse signal pulse in 1 second is counted, to in 1 second, be sent to described phase-locked processor by the count value and second clock marking signal of divided pulse signal then, and send the digital-to-analogue conversion data to digital to analog converter; Described digital to analog converter receives the digital-to-analogue control signal of phase-locked processor and the digital-to-analogue conversion data of counting frequency unit, output control voltage signal is to voltage controlled oscillator, adjust repeatedly until eliminating difference on the frequency, thereby operating frequency value that will this voltage-controlled controlled oscillator is locked as 19.2MHz, and the frequency values of corresponding divided pulse signal is 3.84MHz.
Wherein, phase-locked processor can be realized by digital signal processor; Frequency-dividing counter can be realized by the field programmable gate array chip.
Operation principle of the present invention and job step are: at first, controller sends a lock-in threshold instruction (locking phase control command) to phase-locked processor, and phase-locked processor will be differentiated whether phase-locked success according to this threshold value; When the base station put into effect, controller sent the locking enabled instruction to phase-locked processor then, and phase-locked processor will start phase-locked process; The result that last phase-locked processor will lock feeds back to controller, promptly sends the locking id signal to controller, shows and finishes a phase-locked cycle.In phase-locked process, the pulse per second (PPS) that counting frequency unit (counter/frequency divider) utilizes the GPS module to provide, the divided pulse signal to 3.84MHz in one second duration is counted, and sends a count value and a second clock marking signal to phase-locked processor; Phase-locked processor determined 1 second to increase, detain pulse number in the duration according to the result, to counting frequency unit (counter/frequency divider) transmission increasing button pulse controlled flag signal, and send the digital-to-analogue control signal to digital to analog converter, further adjust voltage controlled oscillator by digital to analog converter output control voltage signal, realize frequency lock thereby constantly adjust.
The invention discloses the synchronous technical scheme of a kind of IP-based PHS grid.Adopt the present invention to propose technical scheme, can steadily realize of the IP network transmission of synchronous TDM business to economy.The PHS networking of IP-based network transmission can be saved a large amount of network line resources, greatly reduces networking cost; Similarly, IP-based transmission means also will have been brought wide prospect for the development of PHS system.
Claims (8)
1, realize the device of Network Synchronization in a kind of IP-based personal hand held phone system, this device is arranged in base station equipment, includes controller, phase-locked processor and clock and adjusts Executive Module, and described controller produces control command, and is sent to phase-locked processor; This phase-locked processor receives and comes from the data-signal that clock is adjusted Executive Module, and transmission clock adjustment signal to clock is adjusted Executive Module, and send the locking id signal to controller, it is characterized in that: this device also includes GPS module, and this GPS module output second clock signal to described clock is adjusted Executive Module.
2, realize the device of Network Synchronization in the IP-based personal hand held phone system according to claim 1, it is characterized in that: described clock adjustment signal includes the digital-to-analogue control signal and increases button pulse controlled flag signal.
3, realize the device of Network Synchronization in the IP-based personal hand held phone system according to claim 2, it is characterized in that: described clock is adjusted Executive Module and is included counting frequency unit, voltage controlled oscillator and digital to analog converter, the counting frequency unit clock signal second, the clock signal and the increasing of described phase-locked processor of voltage controlled oscillator of receiving world locational system module output is respectively detained pulse controlled flag signal, and send data-signal, and send the digital-to-analogue conversion data to digital to analog converter to described phase-locked processor; Described digital to analog converter receives the digital-to-analogue control signal of phase-locked processor and the digital-to-analogue conversion data of counting frequency unit, and output control voltage signal is to voltage controlled oscillator.
4, realize the device of Network Synchronization in the IP-based personal hand held phone system according to claim 3, it is characterized in that: described counting frequency unit is used for the clock signal of voltage controlled oscillator is carried out frequency division, and generate the divided pulse signal, and the pulse in 1 second is counted to the divided pulse signal.
5, realize the device of Network Synchronization in the IP-based personal hand held phone system according to claim 4, it is characterized in that: the data-signal that described counting frequency unit is sent to phase-locked processor includes second clock marking signal and to the counted number of pulses of divided pulse signal in 1 second.
6, realize the device of Network Synchronization in the IP-based personal hand held phone system according to claim 5, it is characterized in that: described phase-locked processor is realized by digital signal processor.
7, realize the device of Network Synchronization in the IP-based personal hand held phone system according to claim 6, it is characterized in that: described frequency-dividing counter is realized by field programmable gate array.
8, realize the device of Network Synchronization in the IP-based personal hand held phone system according to claim 7, it is characterized in that: the control command that described controller produces includes locking enabled instruction and lock-in threshold instruction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100029072A CN100401657C (en) | 2005-01-26 | 2005-01-26 | Apparatus for realizing network synchronization in personal cell phone based on IP |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100029072A CN100401657C (en) | 2005-01-26 | 2005-01-26 | Apparatus for realizing network synchronization in personal cell phone based on IP |
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| Publication Number | Publication Date |
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| CN1812289A true CN1812289A (en) | 2006-08-02 |
| CN100401657C CN100401657C (en) | 2008-07-09 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101202918B (en) * | 2006-12-11 | 2010-04-14 | 中兴通讯股份有限公司 | Method of terminal correcting clock |
| CN101202613B (en) * | 2006-12-11 | 2010-05-19 | 中兴通讯股份有限公司 | Terminal for clock synchronization |
| CN1946002B (en) * | 2006-09-30 | 2010-10-06 | 华为技术有限公司 | Clock synchronizing method between base stations |
| WO2018121358A1 (en) * | 2016-12-26 | 2018-07-05 | 比亚迪股份有限公司 | On-chip clock circuit and on-chip clock signal generation method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW538597B (en) * | 1998-03-31 | 2003-06-21 | Fujitsu General Co Ltd | Phase lock loop circuit |
| JP2000078647A (en) * | 1998-09-02 | 2000-03-14 | Matsushita Electric Ind Co Ltd | Inter-base station radio synchronizing circuit and method for the same |
| JP2002124875A (en) * | 2000-10-17 | 2002-04-26 | Matsushita Electric Ind Co Ltd | Local oscillator |
-
2005
- 2005-01-26 CN CNB2005100029072A patent/CN100401657C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1946002B (en) * | 2006-09-30 | 2010-10-06 | 华为技术有限公司 | Clock synchronizing method between base stations |
| CN101202918B (en) * | 2006-12-11 | 2010-04-14 | 中兴通讯股份有限公司 | Method of terminal correcting clock |
| CN101202613B (en) * | 2006-12-11 | 2010-05-19 | 中兴通讯股份有限公司 | Terminal for clock synchronization |
| WO2018121358A1 (en) * | 2016-12-26 | 2018-07-05 | 比亚迪股份有限公司 | On-chip clock circuit and on-chip clock signal generation method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100401657C (en) | 2008-07-09 |
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