CN101155007B - Method for sharing frequency spectrum between high-power launching pad and low-power launching pad - Google Patents
Method for sharing frequency spectrum between high-power launching pad and low-power launching pad Download PDFInfo
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Abstract
一种大功率发射台与小功率发射台共享频谱的方法，大功率发射台和小功率发射台在相同的载波频率上分时交替地发射大功率发射信号和小功率发射信号，所述大功率发射信号和所述小功率发射信号之间插入有保护时隙。由于大功率信号发射和小功率信号发射都保持了载波间的同步，所以在各载波之间，只存在大功率信号对邻近载波上的大功率信号的干扰、小功率信号对邻近载波上的小功率信号的干扰，而不存在大功率信号对邻近载波上的小功率信号的干扰，因此，各载波之间的保护频带可以设计得较小，从而获得较高的频谱利用效率。本发明可广泛应用于大功率发射台和小功率发射台共存的系统，例如广播电视网络和电信网络融合的无线通信系统。
A method for sharing frequency spectrum between a high-power transmitting station and a low-power transmitting station. The high-power transmitting station and the low-power transmitting station alternately transmit high-power transmitting signals and low-power transmitting signals on the same carrier frequency. A guard time slot is inserted between the transmit signal and the low-power transmit signal. Since both the high-power signal transmission and the low-power signal transmission maintain the synchronization between the carriers, there is only interference from the high-power signal to the high-power signal on the adjacent carrier, and the interference from the low-power signal to the small signal on the adjacent carrier. There is no interference from high-power signals to low-power signals on adjacent carriers. Therefore, the guard frequency bands between carriers can be designed to be smaller, thereby obtaining higher spectrum utilization efficiency. The present invention can be widely applied to a system where a high-power transmitting station and a low-power transmitting station coexist, such as a wireless communication system in which a broadcast television network and a telecommunication network are integrated.
Description
Technical field
The present invention relates to the fusion of high-power wireless network and low-power wireless network, can be applied to the system that television network broadcast and communication network merge mutually, the system that needs the high-power wireless network and the low-power wireless network integration that perhaps other is possible.Belong to areas of information technology.
Background technology
In the legacy communications system, television network broadcast and communication network are the separate cordless communication networks of two covers.Along with the continuous development of communication industry, and relevant art is day by day ripe, and interpenetrating and merging of television network broadcast and communication network become the developing direction that industry is generally acknowledged.At the end of the nineties in last century, the telecommunication law of European and American countries just allows radio and TV industry and telecommunications industry to interpenetrate.European Union is in new " regulatory framework " of calendar year 2001 promulgation, and framework has been contained all communication networks, and " telecommunications service and network " speech is replaced by " information communication ", and the object of its control comprises various transmission meanss.States such as Germany, France, Spain have also launched respectively the regulation that can be engaged in the two-way video service about telecommunications company.Britain set about existing communication and broadcasting regulatory agency are recombinated since calendar year 2001, and similar European Union has put into effect telecommunications company can be engaged in regulations such as Video service.Korea S has begun the trial of integrated services, and the access chip of the access chip of DMB (DMB) and mobile communication is placed in the mobile phone, makes mobile phone to teleview simultaneously.But these also only are some preliminary useful trials, can in system television network broadcast and communication network be fused into an integral body.
Television network broadcast and communication network to be fused into a unified integral body, aloft on the Interface design, just need break existing two and overlap the restriction that networks use separate frequency bands respectively, make television network broadcast can share identical Radio Resource, allow user's receiver can on identical frequency range, receive broadcast television signal and teledata signal with communication network.
Frequency division multiplexing is a kind of multiplex mode of more or less freely realization.If adopt the mode of frequency division multiplexing to allow the high-power sending station of television network broadcast and the small-power transmitting station of communication network share Radio Resource, owing to the power difference between two kinds of transmitting stations is very big, powerful broadcast television signal will cause stronger interference to low power telecommunications digital signal so.In order to suppress this interference, just must between powerful broadcast television signal and low power telecommunications digital signal, reserve bigger protection frequency band to keep the performance of communication network.But will cause the remarkable waste of frequency spectrum resource like this.
The television network broadcast of the high-power base station of existing employing (as DVB etc.) and adopt the communication network (as GSM etc.) of small-power base station is separate system, adopts different air interface technologies separately, works on diverse frequency range.Cause rare frequency spectrum resource to can not get utilizing very fully thus, and be difficult to introduce effective competition mechanism between broadcasting and TV system and the telecommunication system, caused development each other very inharmonious.
Current along with getting online without being tethered to a cable and the developing rapidly of business such as mobile video, more and more stronger to the demand of frequency spectrum resource, rare frequency spectrum resource is preciousness more and more.Therefore, be not suitable for adopting the mode of frequency division multiplexing allow the shared frequency spectrum of television network broadcast and communication network.How to improve the utilance of frequency spectrum effectively, become the problem that these those skilled in the art need solve.
Summary of the invention
The objective of the invention is to, share the method for frequency spectrum by high-power sending station and small-power transmitting station, a kind of new radio communication air interface scheme is provided,, realizes the shared identical frequency spectrum resource of television network broadcast and communication network by time-multiplexed mode.Share the problem of identical frequency spectrum resource to solve high-power sending station with the small-power transmitting station, and improve the utilance of frequency spectrum.
For reaching above-mentioned purpose, the present invention adopts following technical scheme:
A kind of high-power sending station and small-power transmitting station are shared the method for frequency spectrum; high-power sending station with the small-power transmitting station timesharing on identical carrier frequency alternately launch high-power transmit and small-power transmits, described high-power transmit and described small-power is inserted with the protection time slot between transmitting.
Described protection time slot comprises the first protection time slot and the second protection time slot; described high-power transmitting when switching to small-power and transmitting; insert the first protection time slot, described small-power transmits when switching to high-power transmitting, and inserts the second protection time slot.
Described high-power signal emission period includes the control channel of command transmitting information.
Described low-power level signal emission period includes the control channel of command transmitting information.
In the Frame that described small-power transmits; at least comprise a down data subframes and a upstream data subframe; when down data subframes switches to follow-up upstream data subframe; insert the 3rd protection time slot; when the upstream data subframe switches to follow-up down data subframes, insert the 4th protection time slot.
Described carrier wave is a multicarrier, between each carrier wave, separates mutually by the protection frequency band.
As an optimal way more of the present invention, include the control channel and the data channel of time-division or frequency division in the described down data subframes.
As an optimal way more of the present invention, described high-power sending station is the broadcasting and TV base station, described small-power transmitting station is a telecomm base station, launch radio and television frame and teledata frame respectively, include the period configuration signaling of the time assignment information of indication telecommunication path period and radio and television period in the described control channel.
As an optimal way more of the present invention, described high-power transmitting is the radio and television frame, includes the control signaling of broadcasting and TV data and period distribution in the described radio and television frame.
As an optimal way more of the present invention, described broadcasting and TV data and control signaling take the mode of time division multiplexing or frequency division multiplexing to launch.
Because high-power signal emission and low-power level signal emission have all kept the synchronous of intercarrier; so between each carrier wave; only exist high-power signal to the interference of the high-power signal on the adjacent carriers, low-power level signal interference to the low-power level signal on the adjacent carriers; and there be not the interference of high-power signal to the low-power level signal on the adjacent carriers; therefore; protection frequency band between each carrier wave can design lessly, thereby obtains higher spectrum utilization efficiency.The present invention can be widely used in the system of high-power sending station and the coexistence of small-power transmitting station, for example the wireless communication system of television network broadcast and communication network fusion.
Further specify the present invention below in conjunction with drawings and Examples.
Description of drawings
Fig. 1 is the one-segment schematic diagram that high-power sending station and small-power transmitting station are shared frequency spectrum;
Fig. 2 distributes the one-segment schematic diagram of control signaling for the period is provided by telecommunication signal;
Fig. 3 is the multiplexing schematic diagram of the time-frequency of control channel in down data subframes;
Fig. 4 is the time division multiplexing schematic diagram of control channel in the radio and television frame;
Fig. 5 is the frequency division multiplexing schematic diagram of control channel in the radio and television frame;
Fig. 6 is the multiband schematic diagram that high-power sending station and small-power transmitting station are shared frequency spectrum;
Fig. 7 is the multiband schematic diagram that frequency spectrum is shared in high-power base station of radio and television and communication network small-power base station.
Embodiment
Embodiment one: the embodiment that is applied to single carrier wave
As shown in Figure 1, a kind of high-power sending station and small-power transmitting station are shared the method for frequency spectrum, the signal of aerial transmission is divided into two parts that replace mutually in time: high-power emission period and small-power emission period, in high-power emission period, allow high-power sending station to launch the high-power wireless signal aloft, in the small-power emission period, allow the small-power transmitting station to launch the low-power wireless signal aloft.
The radio frames of aerial transmission can be divided into two types of teledata frame and radio and television frames.In the present embodiment, high-power sending station is the broadcasting and TV base station, and the small-power transmitting station is a telecomm base station, launches radio and television frame and teledata frame respectively.Several teledata frames of transmission constitute a telecommunication path period continuously.Several radio and television frames of transmission constitute a radio and television period continuously.As shown in Figure 2, switch to teledata during the period from the radio and television period, insert protection time slot 1.Switch to broadcasting telecommunications during the period from the teledata period, insert protection time slot 2.Wherein, the time-sharing ratio example between teledata frame and the radio and television frame is 2: 1, and alternately closing between them is: per two teledata frames and a radio and television frame alternately send mutually.
Wherein, radio and television period and telecommunication path can comprise control channel in the period, to transmit some signaling informations.The signaling information that wherein has the time resource distribution that comprises relevant telecommunication path subframe and radio and television subframe in the control channel at least.Receiver can be known the time location of required telecommunication path data to be processed or broadcast television signal by detecting the signaling in the control channel.
The control signaling of period distribution is provided by telecommunication signal among Fig. 2.In a teledata frame, comprise a down data subframes and a upstream data subframe.When down data subframes switches to the upstream data subframe, insert protection time slot 3.When the upstream data subframe switches to the down data subframes of follow-up teledata frame, insert protection time slot 4.
Contain control channel and data channel etc. in the down data subframes of teledata frame.Control channel and data channel can be taked time-division or frequency division.Fig. 3 is down data subframes one instantiation of teledata frame, and it includes information such as leading, control channel, data channel, telecommunications downstream data channel.In control channel, include the period configuration signaling; time assignment information with indication telecommunication path period and radio and television period; it can specifically comprise: the time span of frame; time between teledata frame and the radio and television frame distributes and alternately concerns, the length of protection time slot 1 when switching between these two kinds of frames and protection time slot 2 etc.The receiver of telecommunication service can be known the time location of required teledata frame to be processed by the period configuration signaling in the control channel that detects the teledata frame.The receiver of radio and television, know the time location of required radio and television frame to be processed, both can utilize the period configuration signaling in the control channel of teledata frame to determine, also can determine by the radio and television control signaling that is embedded in the radio and television subframe.
When providing the control signaling of period distribution, contain broadcasting and TV data and control signaling etc. in the radio and television frame by the broadcasting and TV signal.Broadcasting and TV data and control signaling can be taked the mode of time division multiplexing or frequency division multiplexing.Fig. 5, Fig. 6 have provided a frequency division and the example of a time-division respectively.
When adopting frequency division multiplexing shown in Figure 4, the control signaling takies the subcarrier of some, can obtain diversity preferably in time domain and frequency domain, therefore helps improving the robust performance of control signaling.
When adopting time division multiplexing shown in Figure 5, the control signaling can send in the different time with the broadcasting and TV data, if therefore terminal does not need to receive the broadcasting and TV data-signal in the radio and television frame, it can directly receive the control signaling so, thereby reduces the power consumption of terminal.
The receiver of radio and television can be known the time location of required radio and television frame to be processed by the period configuration signaling in the control channel that detects the radio and television frame.
The receiver of telecommunication service will be known required time location to be processed, both can determine by the period configuration signaling in the control channel that detects the radio and television frame, also can determine by the period configuration signaling that is embedded at the teledata frame.
Embodiment two: be applied to the embodiment on a plurality of carrier waves
When being in great demand of radio communication service, the power system capacity on the single carrier wave can not be met the need of market well, therefore need use a plurality of carrier waves simultaneously, and the ability of a large number of users business is provided with expanding system.If exist the frequency spectrum resource of one section continuous broad this moment, then can expand, to improve spectrum utilization efficiency according to this programme.
As Fig. 6, shown in Figure 7, when using a plurality of carrier waves to carry out work, on each carrier wave, method and the basic scheme on the single carrier wave that high-power sending station and small-power transmitting station are shared frequency spectrum are similar.On each carrier wave, high-power emission period and small-power emission period all keep the synchronous of intercarrier, all launch high-power signal in the identical time period on each carrier wave that is:, also all launch low-power level signal in the identical time period; Between each carrier wave, separate mutually, disturb with the signal between the control frequency range by suitable protection frequency band.
On each carrier wave, the multiplexing method and the scheme on the single carrier of teledata frame and radio and television frame are similar, can adopt among aforementioned two embodiment any one to realize; Each subcarrier signals emission keeps all sending the teledata frame in the identical time synchronously, at identical time emission radio and television frame; Between each carrier wave, separate mutually, with the signal interference of control intercarrier by suitable protection frequency band.
Claims (5)
1. high-power sending station and small-power transmitting station are shared the method for frequency spectrum, it is characterized in that:
High-power sending station with the small-power transmitting station timesharing on identical carrier frequency alternately launch high-power transmit and small-power transmits, described high-power transmit and described small-power is inserted with the protection time slot between transmitting;
Described protection time slot comprises the first protection time slot and the second protection time slot, and described high-power transmitting when switching to small-power and transmitting inserted the first protection time slot;
Described small-power transmits when switching to high-power transmitting, and inserts the second protection time slot;
Described high-power signal emission period includes the control channel of command transmitting information;
Described low-power level signal emission period includes the control channel of command transmitting information;
In the Frame that described small-power transmits, at least comprise a down data subframes and a upstream data subframe, when down data subframes switches to follow-up upstream data subframe, insert the 3rd protection time slot, when the upstream data subframe switches to follow-up down data subframes, insert the 4th protection time slot;
Described carrier wave is a multicarrier, between each carrier wave, separates mutually by the protection frequency band.
2. high-power sending station according to claim 1 and small-power transmitting station are shared the method for frequency spectrum, it is characterized in that: the control channel and the data channel that include time-division or frequency division in the described down data subframes.
3. high-power sending station according to claim 2 and small-power transmitting station are shared the method for frequency spectrum, it is characterized in that: described high-power sending station is the broadcasting and TV base station, described small-power transmitting station is a telecomm base station, launch radio and television frame and teledata frame respectively, include the period configuration signaling of the time assignment information of indication telecommunication path period and radio and television period in the described control channel.
4. high-power sending station according to claim 1 and small-power transmitting station are shared the method for frequency spectrum, and it is characterized in that: described high-power transmitting is the radio and television frame, include the control signaling of broadcasting and TV data and period distribution in the described radio and television frame.
5. high-power sending station according to claim 4 and small-power transmitting station are shared the method for frequency spectrum, it is characterized in that: described broadcasting and TV data and control signaling take the mode of time division multiplexing or frequency division multiplexing to launch.
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| CN101667946B (en) * | 2008-09-03 | 2013-01-16 | 中兴通讯股份有限公司 | Wireless access network, terminal, frequency spectrum using/multiplexing method and communication implementation method |
| CN101667960B (en) * | 2008-09-04 | 2012-07-04 | 中兴通讯股份有限公司 | Wireless access network system, terminal, data transmission method, and method for dispatching terminal |
| CN101742681B (en) * | 2008-11-20 | 2012-07-18 | 展讯通信（上海）有限公司 | Converging method and equipment for common-frequency point network |
| US8873480B2 (en) * | 2010-10-01 | 2014-10-28 | Intel Corporation | Techniques for dynamic spectrum management, allocation, and sharing |
| US11234288B2 (en) | 2014-08-25 | 2022-01-25 | Coherent Logix, Incorporated | Shared spectrum access for broadcast and bi-directional, packet-switched communications |
| EP3219134A4 (en) | 2014-11-11 | 2018-06-20 | Nokia Solutions and Networks Oy | Method, apparatus, system and computer program |
| CN105120303A (en) * | 2015-08-19 | 2015-12-02 | 武汉米风通信技术有限公司 | Method for transmitting digital TV signal and digital TV system |
| WO2020101852A1 (en) * | 2018-11-12 | 2020-05-22 | Coherent Logix, Inc. | Shared spectrum access for broadcast and bi-directional, packet-switched communications |
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Effective date of registration: 20160108 Address after: 200335 Shanghai city Changning District Admiralty Road No. 999 building 4 Room 601 Patentee after: Shanghai Jushri Technologies, Inc. Address before: 200050 Changning Road, Shanghai, No. 865, No. Patentee before: Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences |