CN1128472A - Two-way literal mobile communication system - Google Patents
Two-way literal mobile communication system Download PDFInfo
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- CN1128472A CN1128472A CN 95105336 CN95105336A CN1128472A CN 1128472 A CN1128472 A CN 1128472A CN 95105336 CN95105336 CN 95105336 CN 95105336 A CN95105336 A CN 95105336A CN 1128472 A CN1128472 A CN 1128472A
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Abstract
The communication system includes at least one central device, at least one relay device and large amount of user's terminals. Every central and relay device has its characteristic code and every user's terminal has respective identifying code. During literal information transmission, the above-said characteristic code and identifying code are sent along with the literal information. The said system can perform two-way literal information transmision quickly while occupying less freq resource.
Description
The present invention relates to a kind of two-way literal mobile communcations system, specifically, the present invention relates to a kind of serial data code signal double-direction radio the multi-user's and have a nationwide midsequent transmission system.
The number of being used widely at present is peaceful, the vinine pager system is a unidirectional radio multi-user serial data transmission system, and this system has at least one central means and a plurality of receiver user independent of each other.Said system can only be transmitted data by uniaxially, and promptly receiver user can not inform whether received paging information, and the user also must answer paging information by phone or other modes.Therefore, above-mentioned pager system can not satisfy the needs that carry out information interchange rapidly.
The appearance of mobile phone has overcome the existing deficiency of pager system, but has meanwhile also brought new problem.We know that the frequency of mobile communication (section) is limited as a kind of resource, and what mobile telephone system was transmitted is voice signal, and the vinine transmission of Information is digital, and the transmission speed of digital signal is that the transmission of voice signal is incomparable.Finish the transmission of identical information amount, the literal transmission means is tens million of times of voice transfer mode, and at some in particular cases, written historical materials can be used as tangible foundation.Under the condition of the transmission of finishing the identical information amount, the identical percent of call lost, the vinine transmission means is from user capacity, and aspects such as busy channel quantity all are hundreds of times of voice mode, and limited frequency resource can be fully used.
Based on above-mentioned prior art, the purpose of this invention is to provide a kind of two-way literal mobile communcations system, this system has overcome the weak point of above-mentioned pager system and mobile telephone system, can carry out rapidly under the prerequisite of two-way literal communicating requirement satisfying, and reaches the mouth of saving frequency resource.
The objective of the invention is to constitute and realize by following system.
Two-way vinine mobile communication system of the present invention comprises at least one central means, at least one relay and a large amount of user terminals, each central means and relay all have condition code separately, each user's set all has identification code separately, between user terminal, realize in the process of Word message transmission, above-mentioned condition code and identification code will automatically be sent with Word message, it is characterized in that in said system, adopting single-channel mode, be that a frequency is respectively used in up-downgoing, the receiving unit of user terminal adopts the data message of fixed frequency reception from relay, and radiating portion adopts the fixed frequency emission, and controls its emission by the accessibility signal that relay sends.
Perhaps this two-way vinine mobile communication system comprises at least one central means, at least one relay and a large amount of user terminals, each central means and relay all have condition code separately, each user terminal all has identification code separately, between user terminal, realize in the process of Word message transmission, above-mentioned condition code and identification code will automatically be sent with vinine information, it is characterized in that the single frequency of descending employing in said system, up employing multifrequency point, be that each relay all has a signaling channel that is used to launch and a plurality of data channel that is used to receive, the receiving circuit of user terminal adopts frequency synthesis technique, signaling channel and data transmission channel in this relay controlled area, receiving circuit automatic scan place, radiating circuit also adopts frequency synthesis technique, and controls its tranmitting frequency by the signaling-information that relay sends.
Further, can link to each other by wired, wireless or satellite channel between the central means of two-way literal mobile communication system of the present invention and the central means, thereby realize user terminal moving between two central means.
Further, the central means of two-way vinine mobile communication system of the present invention can also be by wired, wireless or satellite channel and a middle armature assembly directly or link to each other indirectly, thus realization user terminal mobile between each central means.
Below in conjunction with accompanying drawing the present invention is described in detail.
Fig. 1 is the network structure of single-frequency dot system of the present invention.
Fig. 2 is the network structure of multiple frequency point system of the present invention.
Fig. 3 is the network structure that multiple frequency point system of the present invention carries out national networking.
Digital transmission mode according to two-way literal mobile communication system of the present invention is non-traffic simulator system, when utilizing this system to carry out unidirectional paging, be similar to the working method of Chinese character display paging system, can be by central means editor written historical materials, different with Chinese display paging mode is that the vinine data also can be transmitted by central means then by user terminal from edlin.When utilizing this system to carry out bi-directional digital communication, originating party is sent to relay with the written historical materials that edits with wireless mode, relay is sent to central means by wired or wireless mode, send to the recipient by central means again, the debit receives the written historical materials that has object code of central means emission.
With reference to Fig. 1, the present invention adopts single-channel mode in system, i.e. a frequency is respectively used in up-downgoing, and descending frequency is regularly launched the busy not busy signal of indication receive channel.When local telephone network or long-distance wire user caller party terminal, basic identical with paging system.The characteristics of user terminal receive circuit are that receiving unit adopts fixed frequency in the single-frequency dot system, receive the data message from relay, and this information comprises lteral data and regularly indicates the relay receiving terminal not busy signal that does; Radiating portion adopts the fixed frequency radiation pattern, controls its emission by the accessibility signal that relay sends, if the relay receiving terminal is busy, then waits for.The working method of single-frequency dot system is that the user terminal receiver is often opened, accessibility signal that the reception relay is launched and the data-signal that has condition code, if receive the data that conform to the unique characteristics sign indicating number, then on the screen through after the signal processing this information being presented at user terminal and send sound and light alarm.During the emission data, be the Word message data that to edit,, data sent to relay according to the accessibility signal that relay is regularly launched.Communicating by letter between user terminal and the user terminal, it is the signal that uses subscriber terminal equipment to send to have self identification code and recipient's identification code and Word message address code by originating party, after relay reception processing, deliver to central means, central means is launched by relay through queuing and after handling; If a plurality of relays arranged then send simultaneously together with the condition code of last of the twelve Earthly Branches relay, after treatment, search the relay that the recipient registers by central means, launch by this relay then.Certain distance to be arranged at interval between relay and the relay, to prevent co-channel interference.The advantage of single-frequency dot system is that occupied channel is few, device fabrication is simple; Shortcoming is that capacity is little, and the scope of application is little.
With reference to Fig. 2, the present invention adopts frequency synthesis technique in system, takies physical condition according to frequency range and selects working frequency range, also can adopt and stride band frequency, promptly descending employing V section, up employing U section.Each central means and relay all have condition code separately, between user terminal, realize in the process of Word message transmission, condition code will be sent with Word message, to show above-mentioned condition code on the screen of recipient's user terminal, be to show more than one condition code on recipient's the screen of user terminal, inform this Word message of recipient by which central means and relay forwarding, promptly the recipient can determine that the side of emission is that area in that city.Each user terminal all has an identification code, and this identification code and some other information have constituted the frequency shift keyed signals that is sent to central means or relay together.The effect of identification code is to make central means or relay determine whether this user terminal is the service object of native system, and this identification code will be forwarded to the user terminal that will receive automatically in addition, inform the source of this Word message of recipient, i.e. bolter's identity.As long as user terminal is start, just ceaselessly receive the information of the control channel of central means or relay emission, wherein main component is to be user terminal indication idle channel, when there is idle channel in the area at user terminal place, just will be according to the idle channel that is provided, automatically adjust tranmitting frequency and transmit, reach non-interfering mouthful.If all channels all are in user mode, though this probability is very little, the user also must have channel idle to come out by the time.
The difference of multiple frequency point system and single-frequency dot system is: have the system frequency partition of a plurality of relays to use, the single frequency of following behavior, last behavior multifrequency point, be that each relay all has a plurality of data channels that are used to receive and a signaling channel that is used to launch, busy not busy in order to the indication receive channel.The characteristics of user terminal receive circuit are that receiving circuit adopts frequency synthesis technique in multiple frequency point system, under open state, and signaling channel in the relay controlled area, automatic scan place and data transmission channel.The working method of multiple frequency point system is the signaling-information that user terminal receives this relay controlled area, and every operation carries out in this relay controlled area; Transregional if desired, then differentiate the relay controlled area at place by the field intensity judging circuit, when arriving a certain limit a little less than the received field strength, open and receive scanning, then can scan and receive another field intensity stronger signaling-information if in another relay controlled area this moment, and set is in this channel, according to this signaling indication channel, send registering signal simultaneously, make central means know the relay controlled area at this present place of user terminal.That the advantage of multiple frequency point system is is big with wide capacity, it is little to disturb, and shortcoming is that occupied channel quantity is many.
With reference to Fig. 3, each central means can be by wired, wireless or satellite channel and middle armature assembly directly or link to each other indirectly, thereby the realization user terminal is from a central means mobile to another central means.Relay only is responsible for data forwarding between user terminal, and each central means is carried out identical or different management function as required, for example: the information gathering of personal terminal vinine, forwarding, user terminal whole nation number or local number registration etc.Middle armature assembly is finished to all central means management functions, as data collection, information check etc.The service coverage of central means and relay depends on transmitting power and some other factors of transmitter, is generally 50 kilometers (system's diameter can reach 100 kilometers).Obviously user terminal can arbitrarily move in this scope, if user terminal exceeds this service range, and judge when entering a new relay system, it will use the identification code of himself in new system, work in new midsequent system to new central means request, this state will remain to always and enter till another relay system.User terminal just can move between system like this.
Link to each other by wired, wireless or satellite channel between central means and central means, can realize user terminal moving between two central means.
It is subscriber terminal service that central means and relay also can have a complete system of one's own.
The signal encoding of system of the present invention is:
-aspect: digital signal.
-sign indicating number type: NRZ.
-signal rate: 6400bit/s.
-modulation system: frequency shift keying fsk, four level.
-frequency deviation: ± 4.8KHZ; ± 1.6KHZ.
-coding: adopt MOTOROLA company Flexible High Speed Paging.
The frequency configuration of system of the present invention is:
-operating frequency: 280MHZ frequency range or 800MHZ frequency range.
-frequency range interval: 25KHZ.
-frequency offset: f ± 75 f ± 50 f ± 25.
-transmit receive separation: 10MHZ.
Power system capacity of the present invention is: single-channel system user capacity about 30,000, the multichannel system user capacity can significantly improve according to channel quantity.
The interfacing of system of the present invention requires:
The technical indicator of analog trunk (circuit) should meet the relevant regulations of GB GB7437-87 " public simulation toll telephone automatic switching network transmission performance indicators ".
The technical indicator of digital trunk (circuit) should meet the regulation of " digital-to-analogue is mixed public telephone automatic switching network transmission performance indicators ".
The relay transceiver networking of system of the present invention requires:
-frequency tolerance: during the 800MHZ frequency range 2.5 * 10
During the 280MHZ frequency range 5 * 10
-adjacent-channel power :≤-70dB.
-spuious the width of cloth is penetrated :≤-70dB.
-output impedance: 50 Ω.
-transmitting power: 100W-200W.
-transmitted bandwidth: 16KHZ during the 280MHZ frequency range.
32KHZ during the 800KHZ frequency range.
-receiving sensitivity :≤1.0 μ V.
-antenna perpendicular polarization, high-gain.
The user terminal numbering of system of the present invention adopts the number of hexadecimal number as user terminal, and this number always has eight.Wherein front two is on national network area code, totally 256 of area code quantity; The 3rd is control centre number, totally 16; Five of backs are the sequence number of user terminal; Totally 1048576.
Claims (4)
1. two-way literal mobile communication system, comprise at least one central means, at least one relay and a large amount of user terminals, described central means and relay all have condition code separately, each user terminal all has identification code separately, between user terminal, realize in the process of Word message transmission, above-mentioned condition code and identification code will automatically be sent with vinine information, it is characterized in that: in said system, adopt single-channel mode, be that a frequency is respectively used in up-downgoing, the receiving unit of user terminal adopts the data message of fixed frequency reception from relay, and radiating portion adopts the fixed frequency emission, and controls its emission by the accessibility signal that relay sends.
2. two-way literal mobile communication system, comprise at least one central means, at least one relay and a large amount of user terminals, described central means and relay all have condition code separately, each user terminal all has identification code separately, between user terminal, realize in the process of Word message transmission, above-mentioned condition code and identification code will automatically be sent with vinine information, it is characterized in that: the single frequency of descending employing in said system, up employing multifrequency point, be that each relay all has a signaling channel that is used to launch and a plurality of data channel that is used to receive, the receiving circuit of user terminal adopts frequency synthesis technique, signaling channel and data transmission channel in this relay controlled area, receiving circuit automatic scan place, radiating circuit also adopts frequency synthesis technique, and controls its tranmitting frequency by the signaling-information that relay sends.
3. two-way vinine mobile communication system according to claim 2 is characterized in that can linking to each other by wired, wireless or satellite channel between described central means and the central means, thereby realizes user terminal moving between two central means.
4. according to claim 2 or 3 described two-way vinine mobile communication system, it is characterized in that described central means can be by wired, wireless or satellite channel and a middle armature assembly directly or link to each other indirectly, thus realization user terminal mobile between each central means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95105336A CN1043116C (en) | 1995-05-08 | 1995-05-08 | Two-way literal mobile communication system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95105336A CN1043116C (en) | 1995-05-08 | 1995-05-08 | Two-way literal mobile communication system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1128472A true CN1128472A (en) | 1996-08-07 |
| CN1043116C CN1043116C (en) | 1999-04-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95105336A Expired - Fee Related CN1043116C (en) | 1995-05-08 | 1995-05-08 | Two-way literal mobile communication system |
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| Country | Link |
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| CN (1) | CN1043116C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101595657B (en) * | 2006-09-21 | 2014-07-09 | 高通股份有限公司 | Method and apparatus for mitigating oscillation between repeaters |
| CN112865852A (en) * | 2019-11-28 | 2021-05-28 | 清华大学 | Routing method for network layer addressing based on spatial position information |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5278890A (en) * | 1991-11-27 | 1994-01-11 | At&T Bell Laboratories | Paging arrangements in a cellular mobile switching system |
| US5392452A (en) * | 1992-11-27 | 1995-02-21 | Motorola, Inc. | Selective call signaling system with combined wide area paging and high data rate transmissions via radio telephone transceivers |
-
1995
- 1995-05-08 CN CN95105336A patent/CN1043116C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101595657B (en) * | 2006-09-21 | 2014-07-09 | 高通股份有限公司 | Method and apparatus for mitigating oscillation between repeaters |
| CN112865852A (en) * | 2019-11-28 | 2021-05-28 | 清华大学 | Routing method for network layer addressing based on spatial position information |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1043116C (en) | 1999-04-21 |
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