CN103516415A - Communication control method, change-over device and radio frequency communication system - Google Patents
Communication control method, change-over device and radio frequency communication system Download PDFInfo
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Abstract
The invention discloses a communication control method, a change-over device and a radio frequency communication system. The radio frequency communication system includes a first device, a second device, and the change-over device which performs radio frequency data format conversion between the first device and the second device. The change-over device includes a first communication module which is used for communicating with the first device according to the radio frequency data format of the first device, a second communication module which is used for communicating with the second device according to the radio frequency data format of the second device. The communication control method includes the following steps that: the change-over device receives first signals through the first communication module, wherein the first signals are transmitted to the outside by the first device; whether to activate the second communication module or not is judged according to the first signals; and if it is judged to activate the second communication module according to the first signals, the second communication module is activated, and second signals used for activating the second communication module are transmitted to the outside through the second communication module. By means of the above technical schemes, problems existing in the control of the change-over device which performs radio frequency data format conversion between two devices with different radio frequency data formats.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of communication control method, switching device and radio-frequency (RF) system.
Background technology
Along with the development of wireless communication technology, technology for radio frequency has widely in wireless mobile communications field, irreplaceable effect.The worldwide extensive use of various non-contact cards, as mass transit card, access card, attendance card and bank card etc.
The frequency that existing radio-frequency card is used by low frequency 125KHz to hyperfrequency 2.4GHz not etc., according to different application scenarioss, can be selected different frequency, uses different communication protocol and algorithm.Yet most widely used card reader often only has a kind of fixing rf data form in the market, as works in 13.56MHz, a kind of communications protocol based in TypeA, TypeB, Mifare, Desfire or Felica.The restriction of the rf data form using due to card reader, the radio-frequency card supporting with it is also subject to respective limits, as worked in 13.56MHz, and the use communication protocol identical with card reader and algorithm etc.Therefore, someone proposes a kind of switching device, there is the conversion of carrying out rf data form between the card reader of different radio frequency data format and radio-frequency card, make same card reader under the condition of communication function that does not affect the card matching with its rf data form, increased the communication function with the card of its rf data format mismatching.
But in traditional substitute mode, this switching device is independent of card reader and card moves, if comparatively general problem is after this switching device powers on, with card reader independently, externally send continuously the card seeking signal of different frequency range, caused power consumption penalty.
Summary of the invention
The invention provides a kind of communication control method, switching device and radio-frequency (RF) system, solve carry out the control problem of the switching device of rf data format conversion between two equipment of different radio frequency data format.
For solving the problems of the technologies described above, the present invention takes following technical scheme.
, described communication control method is applied to radio-frequency (RF) communication system, and described radio-frequency (RF) communication system comprises the first equipment, the second equipment and switching device; Switching device comprises for the first communication module of the rf data form according to the first equipment and the first devices communicating, for the second communication module of the rf data form according to the second equipment and the second devices communicating, and for carry out the control module of rf data format conversion between first communication module and second communication module, described communication control method comprises:
First communication module receives the first signal that the first equipment outwards sends;
Control module judges whether to activate described second communication module according to described first signal; If the determination result is YES, activate described second communication module;
Described second communication module outwards sends for activating the secondary signal of the second equipment.
In an embodiment of the present invention, before described first communication module receives described first signal, described switching device is in resting state.
In an embodiment of the present invention, described control module judges whether that according to described first signal the method that activates described second communication module is specially: described control module receives the first signal that described first communication module provides, and whether activates described second communication module according to the identification information judgment that the magnetic field intensity of described first signal and/or described first signal carry.
In an embodiment of the present invention, described control module judges whether that according to the magnetic field intensity of described first signal the process that activates described second communication module comprises:
Convert described first signal to the signal of telecommunication;
The described signal of telecommunication and preset value are compared;
If the described signal of telecommunication is greater than described preset value, judgment result is that and activate described second communication module.
The process whether identification information judgment that in an embodiment of the present invention, described control module is carried according to described first signal activates described second communication module comprises:
Obtain the identification information that described first signal carries;
Described identification information is mated with the first pre-stored equipment identification information collection;
If described the first pre-stored equipment identification information is concentrated and had described identification information, judgment result is that and activate described second communication module.
In an embodiment of the present invention, also comprise: switching device obtains power supply by the described first signal receiving from the first equipment.
, comprise first communication module, second communication module and control module, wherein,
First communication module is used for according to the rf data form of the first equipment and the first devices communicating; And receive the first signal that the first equipment sends;
Second communication module, under the control of described control module, outwards sends for activating the secondary signal of the second equipment; And according to the rf data form of the second equipment and the second devices communicating;
Control module is for judging whether to activate described second communication module according to described first signal; If the determination result is YES, activate described second communication module; Also for carry out rf data format conversion between first communication module and second communication module.
In an embodiment of the present invention, control module comprises format converting module, judge module and switch module, wherein,
Format converting module for carrying out rf data format conversion between first communication module and second communication module;
Judge module judges whether to activate described second communication module for the first signal providing according to described first communication module;
Switch module, for when judgment result is that of described judge module is, activates described second communication module.
In an embodiment of the present invention, described judge module comprises signal of telecommunication modular converter and comparison module, and wherein, described signal of telecommunication modular converter is for converting described first signal to the signal of telecommunication; Described comparison module is for comparing the described signal of telecommunication and preset value; Described switch module, for when the described signal of telecommunication is greater than described preset value, activates described second communication module.
In an embodiment of the present invention, described judge module comprises identification information acquisition module and matching module, wherein: described identification information acquisition module is for obtaining the identification information that described first signal carries; Described matching module is for mating described identification information with the first pre-stored equipment identification information collection; When described switch module exists described identification information for concentrating at described the first pre-stored equipment identification information, activate described second communication module.
In an embodiment of the present invention, described switching device also comprises power management module, for the described first signal receiving by first communication module, from the first equipment, obtain power supply, and described first communication module, second communication module, control module are powered.
, described radio-frequency (RF) communication system comprises the first equipment, the second equipment, and the switching device described in above-mentioned any one; The first equipment is different from the rf data form of the second equipment.
In an embodiment of the present invention, the first equipment is that radio communication frequency is the card reader of 13.56MHz; The second equipment is the terminal with 2.4GHz radio communication frequency radio-frequency card.
Beneficial effect of the present invention comprises: between two different equipment of rf data form, by switching device, carry out the conversion of rf data form, make same equipment under the condition of communication function that does not affect the opposite equip. matching with rf data form, increased the communication function with the equipment of its rf data format mismatching; The first signal simultaneously outwards sending by the first equipment is controlled the activation situation of second communication module in switching device, after second communication module is only activated, just outwards send for activating the secondary signal of the second equipment, so just avoided in traditional substitute mode, switching device is independent of the first equipment and the second equipment moves, and switching device and the first equipment externally send the seeking signal of different frequency range and the power consumption penalty that causes independently, continuously.
Further, before first communication module receives the outside first signal sending of the first equipment, switching device is in resting state, be that modules in switching device is in low power consumpting states such as dormancy, power down, can further realize the control of the first equipment to whole switching device like this, the mode of relatively existing switching device and the first equipment independent operating, has reduced the power consumption of switching device.Improve the disposal environment of switching device.
Accompanying drawing explanation
The schematic diagram of the radio-frequency (RF) system that Fig. 1 provides for one embodiment of the invention;
Fig. 2 is the flow chart of the communication control method of radio-frequency (RF) communication system shown in Fig. 1.
Embodiment
Below by embodiment, by reference to the accompanying drawings the present invention is described in further detail.
Main design of the present invention is: the first signal sending by the first equipment is controlled the activation situation of the second communication module on switching device.Further, after switching device powers on, before not receiving the first signal that the first equipment sends, in resting state, be modules in switching device in low power consumpting states such as dormancy, power down, the first signal sending by the first equipment is realized waking up switching device.
The rf data form of the first equipment, the second equipment is different.The content of rf data form is including, but not limited to radio communication frequency, radio communication agreement, radio frequency algorithm.The radio communication frequency of the first equipment, the second equipment can be for 100KHz be to the optional frequency between 100GHz, as the optional frequency between 13.56MHz, 433.92MHz, 860 to 930MHz, 2.4GHz, 5.8GHz etc.The first equipment is including, but not limited to card reader.The second equipment is including, but not limited to having the terminal of radio-frequency card.
Figure 1 shows that the radio-frequency (RF) system that one embodiment of the invention provides, comprise the first equipment 1, the second equipment 2 and switching device 3; The first equipment 1 is different from the rf data form of the second equipment 2; Switching device 3 for carrying out the conversion of rf data form between the first equipment 1 and the second equipment 2.
Concrete, switching device 3 comprises first communication module 31, second communication module 32, control module 33 and power management module 34, control module 33 further comprises format converting module 331, judge module 332 and switch module 333.Wherein, first communication module 31, second communication module 32 can utilize the radio frequency chip that comprises radio-frequency antenna and radio-frequency (RF) receiving and transmission module to realize, and also can utilize discrete device to realize.Control module 33 can utilize CPU to realize, and can adopt single CPU mechanism, also can adopt two CPU mechanism.First communication module 31 has identical rf data form with the first equipment 1, for communicating according to the rf data form of the first equipment 1 and the first equipment 1; Second communication module 32 has identical rf data form with the second equipment 2, for communicating according to the rf data form of the second equipment 2 and the second equipment 2.Having identical rf data form refers to and has identical radio communication frequency, radio communication agreement and radio frequency algorithm etc.For example, the first equipment 1 is that radio communication frequency is the card reader of 13.56MHz, the second equipment 2 is the mobile phones with 2.4GHz radio communication frequency radio-frequency card, first communication module 31 on switching device 3 can be so: have the 13.56MHz communication module of same radio frequency data format with the card reader of 13.56MHz radio communication frequency, this 13.56MHz communication module can comprise 13.56MHz radio-frequency antenna and 13.56MHz radio-frequency (RF) receiving and transmission module; Second communication module 32 on switching device 3 can be: have the 2.4GHz communication module of same radio frequency data format with the radio-frequency card of 2.4GHz radio communication frequency, this 2.4GHz communication module can comprise 2.4GHz radio-frequency antenna and 2.4GHz radio-frequency (RF) receiving and transmission module.Switching device 3 can be arranged on the side of card reader, center-aligned with 13.56MHz radio-frequency antenna in card reader, and within the scope of the effective communication distance that the distance between card reader requires in 13.56MHz, with guarantee switching device 3 can be reliably, communicate with card reader safely.
Before first communication module 31 and the first equipment 1 communicate, the first signal that first communication module 31 outwards sends for receiving the first equipment 1, this first signal is including, but not limited to magnetic signal.The first signal that first communication module 31 can outwards send by its radio-frequency antenna first equipment 1 that is coupled.
Judge module 332 judges whether to activate second communication module 32 for the first signal receiving according to first communication module 31.
Second communication module 32, for after activating, will outwards send for activating the secondary signal of the second equipment 2.
After activating the second equipment 2, the first equipment 1 and the second equipment 2 can communicate by switching device 3, specifically may be summarized to be: first communication module 31 receives according to the rf data form of the first equipment 1 rf data that the first equipment 1 sends over, this rf data is after format converting module 331 converts to and has same radio frequency data format with the second equipment 2, send second communication module 32 to, second communication module 32 sends to the second equipment 2 by the rf data after conversion according to the rf data form of the second equipment 2.Second communication module 32 receives according to the rf data form of the second equipment 2 rf data that the second equipment 2 sends over, this rf data is after format converting module 331 converts to and has identical rf data form with the first equipment 1, send first communication module 31 to, first communication module 31 sends to the first equipment 1 by the rf data after conversion according to the rf data form of the first equipment 1.Wherein, rf data comprises that the first equipment 1 and the second equipment 2 are by the mutual arbitrary data of switching device 3.
The implementation method of judge module 332 is including, but not limited to several below:
Judge module 332 comprises signal of telecommunication modular converter 332a and comparison module 332b, and signal of telecommunication modular converter 332a converts the signal of telecommunication to for the first signal that first communication module 31 is received; Comparison module 332b is for comparing this signal of telecommunication and preset value; If this signal of telecommunication is greater than this preset value, switch module 333 activates second communication module 32; After second communication module 32 is activated, outwards send for activating the secondary signal of the second equipment 2.Or
Judge module 332 comprises identification information acquisition module 332c and matching module 332d, the identification information that identification information acquisition module 332c carries for obtaining first signal that first communication module 31 receives; Matching module 332d is for mating this identification information with the first pre-stored equipment identification information collection; Described the first pre-stored equipment identification information collection can be pre-stored within the memory module of switching device 3, or be pre-stored within the exterior storage medium being connected with switching device 3, switch module 333 when concentrate there is the entrained identification information of this first signal at this first pre-stored equipment identification information, activates second communication module 32; After second communication module 32 is activated, outwards send for activating the secondary signal of the second equipment 2.Or
Judge module 332 comprises signal of telecommunication modular converter 332a, comparison module 332b, identification information acquisition module 332c and matching module 332d, and signal of telecommunication modular converter 332a converts the signal of telecommunication to for the first signal that first communication module 31 is received; Comparison module 332b is for comparing this signal of telecommunication and preset value; The identification information that identification information acquisition module 332c carries for obtaining first signal that first communication module 31 receives; Matching module 332d is for mating this identification information with the first pre-stored equipment identification information collection; Equally, described the first pre-stored equipment identification information collection can be pre-stored within the memory module of switching device 3, or be pre-stored within the exterior storage medium being connected with switching device 3, switch module is for being greater than this preset value at the comparative result of comparison module 332b for this signal of telecommunication, and the matching result of matching module 332d is this first pre-stored equipment identification information while concentrate there is the entrained identification information of this first signal, activates second communication module 32; After second communication module 32 is activated, outwards send for activating the secondary signal of the second equipment 2.
Power management module 34 can obtain power supply electric energy from switching device 3 inside or external dc power, also can be from the first equipment 1 power taking.From the method for the first equipment 1 power taking, can be: the electromagnetic energy of the first signal that the first equipment 1 being coupled to from first communication module 31 sends, obtain power supply.Power management module 34 can also be stored electric energy, thereby stable electric energy is provided to other modules in switching device 3.
As shown in Figure 2, for being applied to the communication control method of radio-frequency (RF) communication system shown in Fig. 1, specifically comprise following flow process:
S201, the first equipment 1 power on, and at a certain time interval, according to the rf data form of the first equipment 1, externally launch the first signal of special frequency channel, and this first signal can be electromagnetic signal.
S202, switching device 3 power on.After switching device 3 powers on, before not receiving the first signal that the first equipment 1 sends, in resting state, the modules in switching device is in low power consumpting states such as dormancy, power down.
Switching device 3 can directly be powered by inside or external dc power, also can be from the first equipment 1 power taking, and the electric energy obtaining is stored, therefore can by shift knob, realize and powering at any time.
S203, first communication module 31 are by the antenna-coupled first signal of the corresponding band on it, and after being coupled to first signal, switching device 3 is waken up.Now second communication module 32 is not also activated, and other modules can be activated along with being waken up of switching device 3.
S204, first communication module 31 are sent to judge module 332 and power management module 34 by this first signal.
S205, power management module 34 obtain power supply from the electromagnetic energy of first signal, and storage of electrical energy.
S206, judge module 332 judge whether to activate second communication module 32 according to this first signal, if so, enter step S207, otherwise, enter step S208.
S207, switch module 333 activate second communication module 32, and second communication module 32 outwards sends for activating the secondary signal of the second equipment 2, enters step S209.
Concrete, after second communication module 32 is activated, judge module 332 sends to second communication module 32 by identifying information and/or other characteristic informations of entrained the first equipment of the identifying information of switching device 3, first signal, and second communication module 32 externally transmitting modulation has the secondary signal of these information.First equipment 1 of take is that the card reader that radio communication frequency is 13.56MHz is example, the second equipment 2 is that the mobile phone with 2.4GHz radio communication frequency radio-frequency card is example, and second communication module 32 is externally launched the card seeking signal of 2.4GHz according to the rf data form of radio-frequency card.
The disabled state of S208, switch module 333 forbidden energy second communication modules 32 or maintenance second communication module 32, or direct communication finishes.
S209, successfully activate the second equipment 2 after, the first equipment 1 and the second equipment 2 communicate by switching device 3.
In step S206, concrete deterministic process is including, but not limited to several below:
If judge module 332 comprises signal of telecommunication modular converter 332a and comparison module 332b.The first signal that signal of telecommunication modular converter 332a receives first communication module 31 converts the signal of telecommunication to; Comparison module 332b compares this signal of telecommunication and preset value; When this signal of telecommunication is greater than this preset value, judgment result is that and activate second communication module 32, switch module 332c activates second communication module 32; After second communication module 32 is activated, outwards send for activating the secondary signal of the second equipment 2.If this signal of telecommunication is less than or equal to this preset value, judgment result is that and do not activate second communication module 32.
If judge module 332 comprises identification information acquisition module 332c and matching module 332d.Identification information acquisition module 332c obtains the identification information that first signal that first communication module 31 receives carries; Matching module 332d mates this identification information with the first pre-stored equipment identification information collection; Described the first pre-stored equipment identification information collection can be pre-stored within the memory module of switching device 3, or be pre-stored within the exterior storage medium being connected with switching device 3, when concentrate there is the entrained identification information of this first signal in this first pre-stored equipment identification information, judgment result is that and activate second communication module 32, switch module 332c activates second communication module 32; After second communication module 32 is activated, outwards send for activating the secondary signal of the second equipment 2.If this first pre-stored equipment identification information is concentrated and do not had the entrained identification information of this first signal, judgment result is that and do not activate second communication module 32.
Judge module 332 comprises signal of telecommunication modular converter 332a, comparison module 332b, identification information acquisition module 332c and matching module 332d.The first signal that signal of telecommunication modular converter 332a receives first communication module 31 converts the signal of telecommunication to; Comparison module 332b compares this signal of telecommunication and preset value; Identification information acquisition module 332c obtains the identification information that first signal that first communication module 31 receives carries; Matching module 332d is for mating this identification information with the first pre-stored equipment identification information collection; Equally, described the first pre-stored equipment identification information collection can be pre-stored within the memory module of switching device 3, or be pre-stored within the exterior storage medium being connected with switching device 3, at the comparative result of comparison module 332b, be greater than this preset value for this signal of telecommunication, and the matching result of matching module 332d is that this first pre-stored equipment identification information is while concentrate existing the entrained identification information of this first signal, judgment result is that and activate second communication module 32, switch module 332c activates second communication module 32; After second communication module 32 is activated, outwards send for activating the secondary signal of the second equipment 2.At the comparative result of comparison module 332b, be less than or equal to this preset value for this signal of telecommunication, or the matching result of matching module 332d is concentrated while there is not the entrained identification information of this first signal for this first pre-stored equipment identification information, judgment result is that and does not activate second communication module 32.
In the present embodiment, between two different equipment of rf data form, by switching device, carry out the conversion of rf data form, make same equipment under the condition of communication function that does not affect the opposite equip. matching with rf data form, increased the communication function with the equipment of its rf data format mismatching; The first signal outwards sending by the first equipment is controlled the activation situation of second communication module in switching device, after second communication module is only activated, just outwards send for activating the secondary signal of the second equipment, so just avoided in traditional substitute mode, switching device and the first equipment externally send the seeking signal of different frequency range and the power consumption penalty that causes independently, continuously; Before first communication module receives the outside first signal sending of the first equipment, switching device is in resting state, be that modules in switching device is in low power consumpting states such as dormancy, power down, can further realize the control of the first equipment to whole switching device like this, the mode of relatively existing switching device and the first equipment independent operating, has reduced the power consumption of switching device.Improve the disposal environment of switching device.
Above content is in conjunction with concrete execution mode further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (13)
1. a communication control method, described communication control method is applied to radio-frequency (RF) communication system, and described radio-frequency (RF) communication system comprises the first equipment, the second equipment and switching device; Switching device comprises for the first communication module of the rf data form according to the first equipment and the first devices communicating, for the second communication module of the rf data form according to the second equipment and the second devices communicating, and for carry out the control module of rf data format conversion between first communication module and second communication module, it is characterized in that, described communication control method comprises:
First communication module receives the first signal that the first equipment outwards sends;
Control module judges whether to activate described second communication module according to described first signal; If the determination result is YES, activate described second communication module;
Described second communication module outwards sends for activating the secondary signal of the second equipment.
2. communication control method as claimed in claim 1, is characterized in that, before described first communication module receives described first signal, described switching device is in resting state.
3. communication control method as claimed in claim 1, it is characterized in that, described control module judges whether that according to described first signal the method that activates described second communication module is specially: described control module receives the first signal that described first communication module provides, and whether activates described second communication module according to the identification information judgment that the magnetic field intensity of described first signal and/or described first signal carry.
4. communication control method as claimed in claim 3, is characterized in that, described control module judges whether that according to the magnetic field intensity of described first signal the process that activates described second communication module comprises:
Convert described first signal to the signal of telecommunication;
The described signal of telecommunication and preset value are compared;
If the described signal of telecommunication is greater than described preset value, judgment result is that and activate described second communication module.
5. communication control method as claimed in claim 3, is characterized in that, the process whether identification information judgment that described control module is carried according to described first signal activates described second communication module comprises:
Obtain the identification information that described first signal carries;
Described identification information is mated with the first pre-stored equipment identification information collection;
If described the first pre-stored equipment identification information is concentrated and had described identification information, judgment result is that and activate described second communication module.
6. the communication control method as described in claim 1 to 5 any one, is characterized in that, also comprises:
Switching device obtains power supply by the described first signal receiving from the first equipment.
7. a switching device, is characterized in that, comprises first communication module, second communication module and control module, wherein,
First communication module is used for according to the rf data form of the first equipment and the first devices communicating; And receive the first signal that the first equipment sends;
Second communication module, under the control of described control module, outwards sends for activating the secondary signal of the second equipment; And according to the rf data form of the second equipment and the second devices communicating;
Control module is for judging whether to activate described second communication module according to described first signal; If the determination result is YES, activate described second communication module; Also for carry out rf data format conversion between first communication module and second communication module.
8. switching device as claimed in claim 7, is characterized in that, control module comprises format converting module, judge module and switch module, wherein,
Format converting module for carrying out rf data format conversion between first communication module and second communication module;
Judge module judges whether to activate described second communication module for the first signal providing according to described first communication module;
Switch module, for when judgment result is that of described judge module is, activates described second communication module.
9. switching device as claimed in claim 8, is characterized in that, described judge module comprises signal of telecommunication modular converter and comparison module, wherein,
Described signal of telecommunication modular converter is for converting described first signal to the signal of telecommunication;
Described comparison module is for comparing the described signal of telecommunication and preset value;
Described switch module, for when the described signal of telecommunication is greater than described preset value, activates described second communication module.
10. switching device as claimed in claim 8, is characterized in that, described judge module comprises identification information acquisition module and matching module, wherein:
Described identification information acquisition module is for obtaining the identification information that described first signal carries;
Described matching module is for mating described identification information with the first pre-stored equipment identification information collection;
When described switch module exists described identification information for concentrating at described the first pre-stored equipment identification information, activate described second communication module.
11. switching devices as described in claim 7 to 10 any one, it is characterized in that, described switching device also comprises power management module, for the described first signal receiving by first communication module, from the first equipment, obtain power supply, and described first communication module, second communication module, control module are powered.
12. 1 kinds of radio-frequency (RF) system, is characterized in that, described radio-frequency (RF) communication system comprises the first equipment, the second equipment, and the switching device as described in claim 7 to 11 any one; The first equipment is different from the rf data form of the second equipment.
13. radio-frequency (RF) system as claimed in claim 12, is characterized in that, the first equipment is that radio communication frequency is the card reader of 13.56MHz; The second equipment is the terminal with 2.4GHz radio communication frequency radio-frequency card.
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| CN201210204570.3A CN103516415A (en) | 2012-06-20 | 2012-06-20 | Communication control method, change-over device and radio frequency communication system |
| PCT/CN2012/087883 WO2013097772A1 (en) | 2011-12-30 | 2012-12-28 | Radio frequency communication system, method, and terminal, radio frequency adaptation device, and card reading apparatus |
| TW101151090A TWI616073B (en) | 2011-12-30 | 2012-12-28 | Radio frequency communication system, method, terminal, radio frequency switching device and card reading device |
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| CN201210204570.3A CN103516415A (en) | 2012-06-20 | 2012-06-20 | Communication control method, change-over device and radio frequency communication system |
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| CN105468134A (en) * | 2014-09-05 | 2016-04-06 | 富泰华工业（深圳）有限公司 | Display control system, electronic device and display control method therefor |
| CN106559210A (en) * | 2015-09-29 | 2017-04-05 | 中兴通讯股份有限公司 | A kind of data relay method, device and communication system |
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