CN101155385A - Communication system with improved frequency spectrum usage mode - Google Patents
Communication system with improved frequency spectrum usage mode Download PDFInfo
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- CN101155385A CN101155385A CNA2006101524423A CN200610152442A CN101155385A CN 101155385 A CN101155385 A CN 101155385A CN A2006101524423 A CNA2006101524423 A CN A2006101524423A CN 200610152442 A CN200610152442 A CN 200610152442A CN 101155385 A CN101155385 A CN 101155385A
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Abstract
A communication system with improved frequency spectrum using mode is provided in the present invention, comprising: a base station for measuring non-communication admission frequency, so as to obtain dynamic borrow frequency band; and a mobile device for communicating with the base station, receiving the dynamic borrow frequency band, and using the dynamic frequency band and a supporting frequency band to constitute its working frequency band, wherein, the supporting frequency band is selected partial frequency band from the communication admission frequency of a wireless duplex communication system.
Description
Technical field
The present invention relates to the communications field, more specifically, the communication system that relates to comprehensive use communication licensed band and dynamically use frequency band.
Background technology
Frequency spectrum resource is limited, and is increasing to the demand of frequency spectrum along with the continuous growth of radio communication service demand, causes the available spectrum resource deficient day by day, more and more difficult to planning, the distribution of communication spectrum.
Traditional frequency spectrum using method is, in order to ensure the required frequency spectrum of communication system and to guarantee that different system works without interfering with each other, give different types of system assignment fixing working frequency range, the frequency spectrum of distributing to certain class communication system only allows this type systematic to use, and other system cannot use.Difference according to the communication system duplex mode, traditional frequency spectrum distributing method is given Frequency Division Duplexing (FDD) (Frequency Division Duplex, be abbreviated as FDD) the different frequency band of up-downgoing channel allocation of system, give same section frequency band of up-downgoing channel allocation of time division duplex (Time Division Duplex is abbreviated as TDD) system.In order to help global roaming, when spectrum allocation may, need go out a frequency range that the whole world is unified for the TDD systems organization, need go out two frequency ranges that the whole world is unified for the FDD systems organization.No matter communication system is FDD system or TDD system when work, can only use certain interior frequency band between this that distribute for it in advance, fixing spectrum region.
In recent years, some new frequency spectrum usings method have been produced for solution frequency spectrum share, coexistence of systems problem.Wherein, Ericsson (ERICSSON) company provides relevant technical scheme in this respect.For example, the Ya Ge of Ericsson (J rg Huschke, EricssonResearch, Ericsson Eurolab Deutschland GmbH Neumeyerstrasse 50; 90411 N ü rnberg; Germany Joerg.Huschke@eed.ericsson.se Ericsson German Research institute) etc. the people has provided a kind of frequency spectrum using method, in document " downlink capacity (DownlinkCapacity of UMTS Coexisting with DVB-T MFNs and RegionalSFNs) the when DVB-T of UMTS and multifrequency networking, regional single frequency network coexists ", have, analyze its method below in conjunction with accompanying drawing than more comprehensive introduction and performance evaluation.
Two relations that system lays in space when Fig. 1 has provided cell mobile communication systems complex digit broadcasting frequency spectrum.The basic resources of this method utilization that people such as Ya Ge provide is: no matter digit broadcasting system is to adopt multifrequency networking (Multi Frequencies Net, be abbreviated as MFN) still adopt single frequency network (Single Frequency Net, be abbreviated as SFN), in a broadcast transmitter overlay area 102, all can exist a part to belong to the idle frequency spectrum that broadcast system uses, this part idle frequency spectrum is owing to networking need be used by other broadcast transmitters, on the two-dimensional space that these idle frequency spectrums exist, can be further covered by the honeycomb 101 of radius much smaller than 102, these cellulors 101 use the idle broadcast spectrum of its present positions to realize mobile communication.The characteristics of this idle frequency spectrum that is produced by the broadcast system channeling are: the equilateral triangle center that is linked to be with frequency word broadcast cell is to be subjected to this frequency to disturb minimum zone, for example, 7 the C districts that are used for mobile communication that mark among Fig. 1 are in 7 leg-of-mutton center of gravity zones that are used for the C district line formation of television broadcasting, and multiplexing this broadcasting frequency can obtain higher spectrum efficiency in this zone.
The method of utilizing this part idle broadcast spectrum resource that people such as Ya Ge propose is: the broadcast band of free time as UMTS (Universal Mobile TelecommunicationSystem, Universal Mobile Telecommunications System) (FDD) band downlink of system gives permission the frequency spectrum of UMTS (FDD) as uplink band.In the network planning, people's such as Ya Ge method is according to space structure shown in Figure 1, lay cellular communications network below radio network, implementation method is to be subjected to the disturbed condition of other common-frequency broadcasting transmitters to carry out the network planning according to broadcasting idle frequence situation and this idle frequence: determine base station location, determine the downlink working frequency of base station etc.This spectrum reuse (sharing) method that people such as Ya Ge propose has in patent (application number: US 20040092256) " channeling of cellular radio (Cellularradio network reusingfrequencies) " more comprehensively to be discussed.
It is to make UMTS (FDD) system use frequency spectrum more neatly that the idle broadcast spectrum that people such as Ya Ge provide utilizes the purpose of method, its basic ideas are: the band downlink of idle broadcast band as UMTS (FDD) system, give permission the frequency spectrum of UMTS (FDD) as uplink band.Yet there is following major defect in its method:
1) thinking that idle frequency spectrum is used for base station down has determined this method only to be suitable for existing the situation of idle frequency spectrum on big space, is difficult to local idle frequency spectrum is used;
2) because the UMTS communication network uses idle broadcast spectrum as downstream bands, this causes network planning process very complicated, because this planning need have comprehensive grasp to the idle condition and the disturbed condition of broadcast spectrum, this just need carry out the field survey work of gigantic project;
Again plan when in addition, the UMTS network planning need change in the operating position of broadcast spectrum;
3) downstream spectrum of base station can't be consistent in the same network, and this just causes the cell search process of terminal when initial the access complicated;
4) major part is distributed to the frequency spectrum that UMTS uses and is higher than television broadcast band, and prior art is the descending use of television broadcasting frequency spectrum as mobile communication, the transmitting power that is unfavorable for saving travelling carriage; And
5) can not adaptively selected idle frequency spectrum.
Therefore, people need a kind of new frequency spectrum to use solution, can solve the problem in the above-mentioned correlation technique.
Summary of the invention
The present invention aims to provide a kind of communication system, has improved frequency spectrum occupation mode, with solve exist in the above-mentioned correlation technique be difficult to utilize problems such as local idle frequency spectrum.
According to an aspect of the present invention, a kind of communication system with improved frequency spectrum occupation mode is provided, comprise: the base station, be used to measure other licensed band, therefrom dynamically to be used frequency band, wherein, the described frequency band of dynamically using is supported time division duplex, both can be used for uplink, also can be used for downlink transfer; And mobile device, be used for and base station communication, it receives dynamically uses frequency band, and frequency band is dynamically used in utilization and the support frequency band constitutes its working band jointly with frequency division or half frequency division mode, wherein, supporting frequency band is the partial-band of choosing from the communication licensed band of wireless duplex communication system.
By technique scheme, the present invention has realized following technique effect:
1) except being applicable to large space, can also make full use of local idle frequency spectrum;
2) be easy to frequency spectrum and plan, be easy to the network planning;
3) networking is stable, makes the cell search process of terminal when initial the access become simple;
4) can effectively save the transmitting power of travelling carriage; And
5) can select idle frequency spectrum adaptively flexibly.
Other features and advantages of the present invention will be set forth in the following description, and, partly from specification, become apparent, perhaps understand by implementing the present invention.Purpose of the present invention and other advantages can realize and obtain by specifically noted structure in the specification of being write, claims and accompanying drawing.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 shows the method that existing UMTS (FDD) uses received terrestrial digital broadcasting (DVB-T) idle frequency spectrum;
Fig. 2 shows the choosing method that supports frequency spectrum according to an embodiment of the invention and dynamically use frequency spectrum;
Fig. 3 shows frequency spectrum using method flow process according to an embodiment of the invention;
Fig. 4 shows three kinds of structures of base station according to an embodiment of the invention;
Fig. 5 shows the embodiment according to frequency spectrum using method of the present invention and device;
Fig. 6 shows the flow chart according to frequency spectrum using method of the present invention; And
Fig. 7 shows the block diagram according to frequency spectrum operative installations of the present invention.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
The invention provides a kind of frequency spectrum using method and a kind of frequency spectrum operative installations, and a kind of communication system with improved frequency spectrum occupation mode.
Fig. 6 shows the flow chart according to frequency spectrum using method of the present invention, and it may further comprise the steps:
Step S602, from the communication licensed band of wireless duplex communication system exclusively the selected part frequency band as supporting frequency band;
Step S604, dynamically the frequency band of selected part free time is as dynamically using frequency band from other frequency range, and wherein, the described frequency band of dynamically using is supported time division duplex, both can be used for uplink, also can be used for downlink transfer; And
Step S606 will support frequency band and dynamically use frequency band with frequency division or the required frequency spectrum of the common wireless duplex communication system of formation of half frequency division mode.
Alternatively, wireless duplex communication system comprises frequency division or Half-Frequency Division Duplex system, tdd systems.
Alternatively, in supporting frequency band, send basic control information; The described frequency band of dynamically using is used for sending user service data.
Alternatively, dynamically the frequency band of selected part free time comprises and repeatedly carries out following steps as dynamically using frequency band: from other frequency range, choose candidate's spectral range as a plurality of wireless communication systems when certain frequency range is sought the idle frequency spectrum that can use, its searching scope is controlled by the arbitration center; The electromagnetic spectrum of own present position is jointly measured independently or with mobile device in each base station on candidate's spectral range intercycle ground, to seek idle bandwidth; And detected electromagnetic spectrum in each base station and required bandwidth thereof analyzed, according to neighbour's minimum interference principle frequently, that determines to distribute to each base station dynamically uses frequency band.
Alternatively, candidate's spectral range comprises one or more of following frequency spectrum: DTB Digital Terrestrial Broadcasting frequency range, non-citizens' radio band, ISM band, emergent and safe frequency range.
Alternatively, measurement comprises omnidirectional measurement or orientation survey.
Alternatively, measurement may further comprise the steps: after system's initial start, each base station is finished one-shot measurement immediately, and during operation subsequently, each base station continues periodically to measure.
Alternatively, measurement may further comprise the steps: the result that each base station will be measured reports the arbitration center, and the use frequency band range of arbitration center during to the idle frequency spectrum of heterogeneous networks in using same frequency range arbitrated, to avoid mutual conflict.
Alternatively, distribution is dynamically used frequency band and be may further comprise the steps: according to arbitration cases, measurement result, and the loading condition of each base station, take demand assigned principle dynamic assignment between heterogeneous networks dynamically to use frequency band.
Alternatively, distribute and dynamically to use frequency band and may further comprise the steps: will dynamically use frequency band and be divided into trend of work and use frequency band and the standby frequency band of dynamically using, wherein, trend of work is used frequency band and is set to work state commonly used and dynamically uses frequency band and be set to trend of work and use when frequency band can't use and can change work over to.
Alternatively, determine that trend of work uses frequency band and may further comprise the steps: the idle bandwidth that measure the idle bandwidth that a base station measurement in each base station is obtained and its adjacent base station carries out AND operation, the span of using frequency band as the trend of work of a base station with value that AND operation is obtained.
Alternatively, determine that trend of work is used frequency band and the standby frequency band of dynamically using may further comprise the steps: the idle bandwidth that measure the idle bandwidth that a base station measurement in each base station is obtained and its adjacent base station, and the idle bandwidth that the mobile device in base station range is measured carries out AND operation, and what AND operation was obtained uses frequency band and standby span of dynamically using frequency band with value as the trend of work of a base station.
Fig. 7 shows the block diagram according to frequency spectrum operative installations 700 of the present invention, and it comprises:
Support frequency band module 702 be set, be used for from the communication licensed band of wireless duplex communication system exclusively the selected part frequency band as supporting frequency band;
Dynamic band is provided with module 704, is used for that dynamically the frequency band of selected part free time is as dynamically using frequency band from other frequency range, and wherein, the described frequency band of dynamically using is supported time division duplex, both can be used for uplink, also can be used for downlink transfer; And
Downstream spectrum makes up module 706, is used for supporting frequency band and dynamically using frequency band with frequency division or the required frequency spectrum of the common wireless duplex communication system of formation of half frequency division mode.
Alternatively, wireless duplex communication system comprises frequency division or Half-Frequency Division Duplex system, tdd systems.
Alternatively, in supporting frequency band, send basic control information; The described frequency band of dynamically using is used for sending user service data.
Alternatively, dynamic band is provided with module 704 and comprises: candidate's spectral range is chosen the module (not shown), be used for choosing candidate's spectral range from other frequency range, when certain frequency range was sought the idle frequency spectrum that can use, its searching scope was controlled by the arbitration center as a plurality of wireless communication systems; Idle bandwidth detection module (not shown) is used to make each base station jointly to measure the electromagnetic spectrum of own present position on candidate's spectral range intercycle ground independently or with mobile device, to seek idle bandwidth; And dynamically use bandwidth assignment module (not shown), and be used for detected electromagnetic spectrum in each base station and required bandwidth thereof are analyzed, according to neighbour's minimum interference principle frequently, that determines to distribute to each base station dynamically uses frequency band.
Alternatively, candidate's spectral range comprises one or more of following frequency spectrum: DTB Digital Terrestrial Broadcasting frequency range, non-citizens' radio band, ISM band, emergent and safe frequency range.
Alternatively, measurement comprises omnidirectional measurement or orientation survey.
Alternatively, the idle bandwidth detection module is used for after system's initial start, makes each base station finish one-shot measurement immediately, during operation subsequently, makes each base station continue periodically to measure.
Alternatively, the result that the idle bandwidth detection module is used to each base station will be measured reports the arbitration center, and the use frequency band range of arbitration center during to the idle frequency spectrum of heterogeneous networks in using same frequency range arbitrated, to avoid mutual conflict.
Alternatively, dynamically use the bandwidth assignment module and be used for according to arbitration cases, measurement result, and the loading condition of each base station, take demand assigned principle dynamic assignment between heterogeneous networks dynamically to use frequency band.
Alternatively, dynamically using the bandwidth assignment module is used for being divided into trend of work and using frequency band and the standby frequency band of dynamically using dynamically using frequency band, wherein, trend of work is used frequency band and is set to work state commonly used, dynamically uses frequency band and is set to trend of work and uses when frequency band can't use and can change work over to.
Alternatively, dynamically use the idle bandwidth that the bandwidth assignment module is used for idle bandwidth that a base station measurement with each base station obtains and its adjacent base station measuring and carry out AND operation, the span of using frequency band as the trend of work of a base station with value that AND operation is obtained.
Alternatively, dynamically use the bandwidth assignment module and be used for the idle bandwidth that measure idle bandwidth that a base station measurement of each base station just obtains and its adjacent base station, and the idle bandwidth that the mobile device in base station range is measured carries out AND operation, and what AND operation was obtained uses frequency band and standby span of dynamically using frequency band with value as the trend of work of a base station.
Fig. 2 shows support frequency spectrum according to an embodiment of the invention and dynamically uses the choosing method of frequency spectrum, according to the basic ideas of frequency spectrum using method of the present invention as shown in Figure 2.
See Fig. 2 (a), from the communication licensed band (the LBC frequency range: Licensed Band forCommunications) 203 the selected part frequency band as the part of the required frequency spectrum of communication system, again from certain section idle frequency spectrum interval 202 interior selected part frequency bands another part as the required frequency spectrum of communication system, wherein, idle frequency spectrum interval 202 belongs to any part in the electromagnetic spectrum 201.Communication system is the support frequency band (SB:Supporting Band) of the frequency band of choosing from LBC frequency range 203 as communication system work, to support frequency band SB is support, communication system is dynamically chosen DBB (DynamicallyBorrowed Band in certain section idle frequency spectrum, dynamically use frequency band), with DBB replenishing as the required frequency spectrum of communication system.Then, carry out the network planning, in supporting frequency band, send basic control information, as pilot signal, incoming control signal, dynamically use frequency band index signal etc. according to supporting frequency band.
It should be noted that in addition the communication licensed band 203 here can be the frequency range that the FDD system is given in planning, see Fig. 2 (b), also can be the licensed band 203A that the TDD system is given in planning.Idle frequency range 202A can belong to DTB Digital Terrestrial Broadcasting frequency range, certain non-citizens' radio band, ISM (Industrial, Scientific and Medical: industry, scientific research and medical treatment) frequency range, meet an urgent need and safe frequency range etc.From the angle of frequency spectrum use flexibility, use the licensed band 203A of TDD system can reach better frequency spectrum result of use as supporting frequency band SB.
According to above-mentioned thinking, the invention provides a kind of frequency spectrum using method, its basic step as shown in Figure 3:
First step S302: for communication system is determined a working band in the communication licensed band.See Fig. 2 (a), the communication licensed band 203 here can be the frequency range that the FDD system is given in planning, sees Fig. 2 (b), also can be the licensed band 203A that the TDD system is given in planning.From the angle of frequency spectrum use flexibility, use the licensed band 203A of TDD system can reach better frequency spectrum result of use as supporting frequency band SB.This frequency band is used for the support frequency band of communication system, carries out the network planning, in supporting frequency band, send basic control information, as pilot signal, incoming control signal, dynamically use frequency band index signal etc. according to supporting frequency band.
The second step S304: candidate's spectral range of determining dynamically to use frequency band (DBB) for communication system.Candidate's frequency spectrum of dynamically using frequency band (DBB) can belong to the ground TV broadcast frequency range, certain non-citizens' radio band, ISM (Industrial, Scientific and Medical: industry, scientific research and medical treatment) frequency range, emergent and safe frequency range etc., for simplified communication system idle frequency spectrum search work amount in the course of the work, need in advance according to the frequency spectrum operating position of locality and with the coordination situation of the frequency spectrum side of having, determine an idle frequency spectrum hunting zone roughly to communication system, determine promptly communication system is searched for idle frequency range in which section frequency spectrum, as, determine in the ground TV broadcast frequency range, to search for DBB, perhaps determine in certain non-citizens' radio band, to search for DBB.
The 3rd step S306～S308: determine concrete DBB by carrying out the spectrum environment measurement, it is by repeating following step S306 and step S308 realizes.
Step S306: spectrum environment is measured.After system's initial start, each base station will be finished spectrum measurement one time according to predetermined candidate's spectral range of dynamically using frequency band (DBB) of second step, obtain and dynamically use frequency band (DBB) data.This measurement is finished by the DBB measuring unit in the base station.During system's operation, each base station is periodically carried out spectrum environment and is measured.
Wherein, spectrum environment is measured and can be carried out according to following two kinds of methods:
Spectrum environment method of measurement 1: the electromagnetic spectrum of the own present position of independent measurement, spectrum measurement unit (seeing 406 among Fig. 4) that oneself disposes is used in each base station, and measurement result is reported passage adjustment unit 405.The base station can be an omnidirectional measurement to the measurement of frequency spectrum, also can be orientation survey, and orientation survey can obtain DBB data more accurately;
Spectrum environment method of measurement 2: the electromagnetic spectrum of each base station and the own present position of travelling carriage fellowship is measured, and measurement result is reported passage adjustment unit 405 and DBB arbitration center 511 (see figure 5)s.DBB arbitration center 511 is responsible for the DBB scope of heterogeneous networks (these networks belong to same operator or obstructed operator) when the idle frequency spectrum in the same frequency range is dynamically used and is arbitrated, to avoid mutual conflict;
Step S308: determine concrete DBB.Passage adjustment unit 405 can be distributed in each base station and realize, also can realize in base station controller, perhaps as independently network building-out unit realization.The spectrum measurement data that 405 couples of step S306 of passage adjustment unit obtain; and between the arbitration information sent of DBB arbitration center 511 and the different system and the demand of the protection bandwidth between the different channels; carry out comprehensive; determine work DBB and the standby DBB that use each base station, standby DBB is meant that when work DBB can't use base station can change the DBB of work over to.
DBB arbitrates between center 511 bases heterogeneous networks in advance the negotiation scheme of dynamically using frequency spectrum, the enforcement spectrum measurement data that the base station is sent here, the radio bearers data of each base station are taked use interval, service time (or time slot) and the use amount of demand assigned principle dynamic assignment idle frequency spectrum between heterogeneous networks.The base station assigns more free frequency spectrum heavy to load.
Definite method of DBB is: for determining its work DBB and standby DBB respectively in each base station.The specific implementation step comprises:
1) at first determines the idle frequency band bandwidth that the base station can be used.A kind of determine a base station can with the method for idle frequency band bandwidth be: the idle bandwidth that measure the idle bandwidth of being measured by this base station and its adjacent base station carries out the AND operation decision; Another kind of determine a base station can with the method for idle frequency band bandwidth be: the idle bandwidth that measure the idle bandwidth of being measured by this base station and its adjacent base station, and the idle bandwidth that the terminal in the zone that covers, this base station is measured carries out AND operation, and common ground is as the work DBB of this base station and the span of standby DBB.
2) determine the work DBB and the standby DBB of each base station, concrete grammar is: according to the work DBB of adjacent base station and the span of standby DBB, with the required DBB of system the size and consistent as far as possible with the DBB of adjacent base station be principle, determine the work DBB of each base station in the span of the work DBB of each base station and standby DBB, remainder is as standby DBB bandwidth.
From above description as can be seen, frequency spectrum using method according to the present invention is convenient to realize frequency spectrum planning and distribution on frequency spectrum uses; On the frequency spectrum service efficiency, can make full use of idle frequency spectrum; And in the selection of idle frequency spectrum, has adaptive ability.Describe in detail according to frequency spectrum using system of the present invention below in conjunction with accompanying drawing.
The invention provides a kind of communication system with improved frequency spectrum occupation mode, comprising: the base station is used to measure other licensed band, therefrom dynamically to be used frequency band, wherein, the described frequency band of dynamically using is supported time division duplex, both can be used for uplink, also can be used for downlink transfer; And mobile device, be used for and base station communication, it receives dynamically uses frequency band, and frequency band is dynamically used in utilization and the support frequency band constitutes its working band jointly with frequency division or half frequency division mode, wherein, supporting frequency band is the partial-band of choosing from the communication licensed band of wireless duplex communication system.
Alternatively, communication system comprises frequency division or Half-Frequency Division Duplex system, tdd systems.
Alternatively, support frequency band and be used to carry out the network planning and be used to send basic control information, dynamically use frequency band and be used for sending user service data
Alternatively, the base station comprises: the spectrum measurement unit, and the electromagnetic spectrum in the own present position of measurement, candidate's spectral range intercycle ground, to seek idle bandwidth, wherein candidate's spectral range is chosen from other licensed band.
Alternatively, candidate's spectral range comprise following one of at least: DTB Digital Terrestrial Broadcasting frequency range, non-citizens' radio band, ISM band, emergent and safe frequency range.
Alternatively, measurement comprises omnidirectional measurement or orientation survey.
Alternatively, the base station also comprises: the arbitration center, the frequency band range of using when being used for the idle frequency spectrum of heterogeneous networks in using same frequency range is arbitrated, to avoid mutual conflict.
Alternatively; the base station also comprises: the passage adjustment unit; be used for the spectrum measurement data that the spectrum measurement unit obtains; and between the arbitration information sent of arbitration center and the different system and the demand of the protection bandwidth between the different channels; carry out comprehensively, that determines that each base station uses dynamically uses frequency band.
Alternatively, the passage adjustment unit also is used for being divided into trend of work and using frequency band and the standby frequency band of dynamically using dynamically using frequency band, wherein, trend of work is used frequency band and is set to work state commonly used, dynamically uses frequency band and is set to trend of work and uses when frequency band can't use and can change work over to.
Alternatively, the idle bandwidth that the passage adjustment unit is used for idle bandwidth that a base station measurement with each base station obtains and its adjacent base station measuring carries out AND operation, the span of using frequency band as the trend of work of a base station with value that AND operation is obtained.
Alternatively, the passage adjustment unit is used for the idle bandwidth that measure idle bandwidth that a base station measurement with each base station obtains and its adjacent base station, and the idle bandwidth that the mobile device in base station range is measured carries out AND operation, and what AND operation was obtained uses frequency band and standby span of dynamically using frequency band with value as the trend of work of a base station.
Alternatively, the base station method of work comprises following at least a: tdd mode, TDD/FDD composite mode
Alternatively, mobile device comprises following at least a: mobile phone, digital television receiver.
Frequency spectrum using system according to the present invention comprises the base station that can carry out the DBB measurement and the travelling carriage that can receive the DBB data, and wherein, the DBB data that travelling carriage (or terminal) sends according to the base station are determined the working band of oneself.Comprehensive use is distributed to the licensed band (LBC:Licensed Band for Communications) of communication system and is dynamically used frequency range (DBB:Dynamically Borrowed Band) and carry out the structure that the key of radio communication is the base station, and the architecture of base station that the present invention provides as shown in Figure 4.3 kinds of architecture of base station that Fig. 4 provides can realize that communication system is to licensed band with dynamically use the comprehensive use of frequency range.
The base station that Fig. 4 (a) provides comprises Base-Band Processing and administrative unit 401, down going channel (passage 1) 402, data feedback channel (passage 2) 404, air feedback unit 403, passage adjustment unit 405, spectrum measurement unit 406.Wherein, corresponding unit function in the FDD system of Base-Band Processing and administrative unit 401, down going channel (passage 1) 402, air feedback unit 403 and routine is identical with structure or close, its main distinction is, down going channel (passage 1) 402 not only sends conventional communication control information, also will send DBB information to terminal; Corresponding unit in the FDD system of data feedback channel (passage 2) 404 and routine is compared, and has strengthened the ability that working band is dynamically adjusted, and can carry out the passage adjustment adaptively according to the variation of DBB; The introducing of passage adjustment unit 405, spectrum measurement unit 406 is characteristics of comprehensive usage license frequency range LBC and the base station of dynamically using frequency range DBB, is the place with conventional base station difference maximum on forming.
The electromagnetic spectrum of own present position is measured in spectrum measurement unit 406, and measurement result is reported passage adjustment unit 405.Spectrum measurement unit 406 can adopt the omnidirectional measurement mode, also can adopt the orientation survey mode.Passage adjustment unit 405 can be distributed in each base station and realize, also can realize in base station controller, perhaps as independently network building-out unit realization.The arbitration information at spectrum measurement data that 405 pairs of adjacent base stations of passage adjustment unit obtain and DBB arbitration center is carried out comprehensively, determine work DBB that uses the base station and the running parameter of adjusting the base station passage according to this DBB, determine work DBB and the standby DBB that use each base station.Added passage adjustment unit 405 in the FDD system that this architecture of base station can be regarded as in routine, spectrum measurement unit 406 constitutes.
The base station that Fig. 4 (b) provides comprises Base-Band Processing and administrative unit 401B, passage 1 (duplex channel) 402B, passage 2 (duplex channel) 404B, air feedback unit 403B, the whole unit 405 of passage instruction, spectrum measurement unit 406.Wherein, Base-Band Processing is identical with structure or close with the corresponding unit function that the TDD system of administrative unit 401B, passage 1 (duplex channel) 402B, passage 2 (duplex channel) 404B, air feedback unit 403B and routine plants, its main distinction is, passage 1 (duplex channel) 402B is operated in to support on the frequency band, not only send conventional communication control information, also will send DBB information to terminal; Corresponding unit in the TDD system of passage three (duplex channel) 404B and routine is compared, and has strengthened the ability that working band is dynamically adjusted, and can carry out the passage adjustment adaptively according to the variation of DBB; The structure of passage adjustment unit 405, spectrum measurement unit 406 is identical with Fig. 4 (a) with effect.This architecture of base station can be regarded as by the conventional TDD system Shen of two covers and has added passage adjustment unit 405,406 evolution of spectrum measurement unit.
The base station that Fig. 4 (c) provides comprises Base-Band Processing and administrative unit 401C, passage 1 (duplex channel) 402C, passage 2 (duplex channel) 404C, air feedback unit 403C, passage adjustment unit 405, spectrum measurement unit 406, dual-mode control unit 407.Wherein, Base-Band Processing is similar to Fig. 4 (b) corresponding unit with the structure of administrative unit 401C, passage 1 (duplex channel) 402C, passage 2 (duplex channel) 404C, air feedback unit 403C, its main distinction is, Base-Band Processing and administrative unit 401C have increased the information processing of many dual-modes need of work, as above down load measuring management, synchro measure management etc.; Passage 1 (duplex channel) 402C is operated in and supports on the frequency band, except being responsible for sending conventional communication control information, the DBB information, also to send the mode of operation information under many dual-modes, as the time slot arrangement information of TDD subpattern and FDD subpattern under the transmission mixed mode; The structure of passage 2 (duplex channel) 404C is identical with passage 2 (duplex channel) 404B; The structure of passage adjustment unit 405, spectrum measurement unit 406 is identical with Fig. 4 (a) with effect; The metrical information that dual-mode control unit 407 is sent here according to Base-Band Processing and administrative unit 401C, as above down load situation, the translational speed of the type of terminal, the position of terminal, terminal etc., in the sub-district, broadcast duplex mode information, as the time slot arrangement information of TDD subpattern and FDD subpattern under the transmission TDD/FDD mixed mode.This architecture of base station of Fig. 4 (c) can be regarded as by having added passage adjustment unit 405, spectrum measurement unit 406,407 evolution of dual-mode control unit in the conventional TDD system of two covers.
From above description as can be seen, can reach following effect according to base station system of the present invention: 1) can realize the combination of multiple dual-mode, both can make full use of the existing TDD frequency spectrum resource, has the two advantage of TDD, FDD again, as be easy to stablize networking on a large scale, be easy to the up-downgoing scheduling of resource, support the high-speed mobile business preferably, support non-symmetrical service on system group network, can realize the global stability networking easily; 2) be easy to realize, practical, for example, detect and administrative unit as long as in existing TDD system (as using two cover TD-SCDMA base stations), add idle frequency spectrum, just can realize the basic function of system; 3) the change amount to terminal is little.
Fig. 5 is an embodiment that adopts the system of frequency spectrum using method of the present invention.Among the figure, 501～504th, the transmitter of ground TV broadcast, f1～f4 are respectively the frequencies that transmitter 501～504 uses, the border circular areas in 501～504 difference coverage diagrams.
Fundamental system of the present invention is made up of several base stations among Fig. 5 (505,506 etc.), several terminals 509 etc., a DBB arbitration center 511.Merge in order to realize broadcasting with the system that communicates by letter, system of the present invention can also comprise that several utilize its up link to constitute the television receiver 510 of backward channel.Have only a system using the idle channels of television broadcasting in order to simplify problem definition, to suppose, this moment, DBB arbitration center was all distributed to a mobile communication system use to all available idle frequency spectrums.
For outstanding explanation to the frequency spectrum using method, the structure that the base station in the present embodiment (505 etc.) adopt Fig. 4 (a) to provide.In UMTS TDD licensed band, as in 1885～1920MHz scope, to choose one section needed frequency band and support frequency band SB as it, the network planning of system, main access control, primary pilot signal, DBB information broadcast etc. all carry out in this section SB.
The groundwork process of system is as follows:
1) after system starts working, at first finish determining of DBB, then, each base station is broadcast pilot, work DBB data in supporting frequency band, and set up the various channels that travelling carriage inserts required use, and carry out to receive in the DBB frequency band of determining and prepare.In the present embodiment, the measurement result of base station 505 and adjacent base station thereof all is near the interference minimum the frequency f2; The measurement result of base station 506 and adjacent base station thereof all is near the interference minimum the frequency fl, therefore, uses f2 as work DBB in the sub-district 509 that base station 505 covers, and uses f1 as work DBB in the sub-district 508 that base station 506 covers.
2) when travelling carriage need connect, travelling carriage at first utilizes the pilot signal that supports in the frequency band SB to set up synchronized relation, receives the DBB information broadcast then, according to the DBB data of broadcasting, initiates to insert request in concrete DBB frequency band.
3) after connection was set up, the mode of operation (FDD) that travelling carriage (or terminal) 509 promptly issues according to the base station was implemented to communicate by letter with channel parameter (time slot position).
4) when near the spectrum environment the further grasp of the base station needs travelling carriage, base station 505 issues the spectrum measurement indication to terminal 509, and terminal reports the base station after finishing measurement.
5) ability that has television reception and link when television receiver 510 with radio communication base station.In the time of need setting up backward channel, as, request program maybe needs to participate in interactive event, just utilizes system of the present invention to set up the corresponding communication link.Also can use the receiver in the television receiver 510 to realize the idle channel measurement, and measurement result be sent to network by its communication interface.
Behind the architecture of base station that adopts Fig. 4 (b) to provide, native system can be realized two independent TDD passage: the one tunnel is operated in the SB frequency band, and one the tunnel is operated in the DBB frequency band; Also can get up this two independent TDD combination of channels, form a FDD passage, the one tunnel is operated in the SB frequency band, and one the tunnel is operated in the DBB frequency band;
Behind the architecture of base station that adopts Fig. 4 (b) to provide, native system can be realized the passage of compound duplex, and efficient, flexible ground uses frequency spectrum more.
As can be seen from the above description, the invention provides a kind of comprehensive use distributes to the licensed band of communication system and dynamically uses frequency range and carry out method of wireless communication and device.The present invention chooses the part of frequency band as a required downstream spectrum of communication system from the LBC frequency range, choose frequency band another part as the required frequency spectrum of communication system again in certain section idle frequency spectrum interval in addition.Communication system as supporting frequency band, is the frequency band chosen from the LBC frequency range support to support frequency band SB, and communication system is dynamically chosen in certain section idle frequency spectrum and dynamically used frequency band DBB, and DBB replenishes as the required frequency spectrum of communication system.Base station system provided by the invention has candidate's frequency range measurement function of DBB, candidate's frequency range measurement result of the some adjacent base stations by comprehensive certain base station, determine use between the terminal of this its service of base station dynamically use frequency band DBB.
Like this, the present invention can reduce the difficulty of frequency spectrum planning, significantly improves frequency spectrum service efficiency and enhanced system ability.Especially, the present invention both for fully using the TDD frequency spectrum resource of cooking up that using method is provided, also provided the frequency spectrum guarantee for expansion TDD system works pattern (expanding to the TDD/FDD composite mode from single tdd mode).As seen, the frequency spectrum that the invention provides and be easy to frequency spectrum planning, be easy to the network planning, networking is stable, can selects idle frequency spectrum (dynamically using frequency band DBB) adaptively flexibly uses, and can be according to service conditions, between tdd mode, fdd mode, TDD/FDD pattern, adjust its optimum working mode adaptively.Specifically, the present invention has realized following technique effect:
1) except being applicable to large space, can also make full use of local idle frequency spectrum;
2) be easy to frequency spectrum and plan, be easy to the network planning;
3) networking is stable, makes the cell search process of terminal when initial the access become simple;
4) can effectively save the transmitting power of travelling carriage; And
5) can select idle frequency spectrum adaptively flexibly.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present invention or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and carry out by calculation element, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the present invention is not restricted to any specific hardware and software combination.Should be understood that the variation in these concrete enforcements is conspicuous for a person skilled in the art, do not break away from spiritual protection range of the present invention.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the communication system with improved frequency spectrum occupation mode is characterized in that, comprising:
The base station is used to measure other licensed band, and therefrom dynamically to be used frequency band, wherein, the described frequency band of dynamically using is supported time division duplex, both can be used for uplink, also can be used for downlink transfer; And
Mobile device, be used for and described base station communication, it receives the described frequency band of dynamically using, and utilize the described frequency band of dynamically using to constitute its working band jointly with frequency division or half frequency division mode with the support frequency band, wherein, described support frequency band is the partial-band of choosing from the communication licensed band of described wireless duplex communication system.
2. communication system according to claim 1 is characterized in that, described communication system comprises frequency division or Half-Frequency Division Duplex system, tdd systems.
3. communication system according to claim 1 is characterized in that, described support frequency band is used to carry out the network planning and is used to send basic control information, and the described frequency band of dynamically using is used for sending user service data.
4. communication system according to claim 1 is characterized in that, described base station comprises:
The spectrum measurement unit, the electromagnetic spectrum in the own present position of measurement, candidate's spectral range intercycle ground, to seek idle bandwidth, wherein said candidate's spectral range is chosen from described other licensed band.
5. communication system according to claim 4 is characterized in that described measurement comprises omnidirectional measurement or orientation survey.
6. communication system according to claim 4 is characterized in that, described base station also comprises:
The arbitration center, the frequency band range of using when being used for the idle frequency spectrum of heterogeneous networks in using same frequency range is arbitrated, to avoid mutual conflict.
7. communication system according to claim 4 is characterized in that, described base station also comprises:
The passage adjustment unit; be used for the spectrum measurement data that described spectrum measurement unit obtains; and between the arbitration information sent of described arbitration center and the different system and the demand of the protection bandwidth between the different channels, carry out comprehensively, that determines that each base station uses dynamically uses frequency band.
8. communication system according to claim 7, it is characterized in that, described passage adjustment unit also is used for the described frequency band of dynamically using is divided into trend of work and uses frequency band and the standby frequency band of dynamically using, wherein, described trend of work is used frequency band and is set to work state commonly used, and the described frequency band of dynamically using is set to described trend of work and uses when frequency band can't use and can change work over to.
9. communication system according to claim 8, it is characterized in that, the idle bandwidth that described passage adjustment unit is used for idle bandwidth that a base station measurement with described each base station obtains and its adjacent base station measuring carries out AND operation, the span of using frequency band as the described trend of work of a described base station with value that described AND operation is obtained.
10. communication system according to claim 8, it is characterized in that, described passage adjustment unit is used for the idle bandwidth that measure idle bandwidth that a base station measurement with described each base station obtains and its adjacent base station, and the idle bandwidth measured of mobile device in the described base station range carries out AND operation, and what described AND operation was obtained uses frequency band and described standby span of dynamically using frequency band with value as the described trend of work of a described base station.
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| CNA2006101524423A CN101155385A (en) | 2006-09-29 | 2006-09-29 | Communication system with improved frequency spectrum usage mode |
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2006101524423A CN101155385A (en) | 2006-09-29 | 2006-09-29 | Communication system with improved frequency spectrum usage mode |
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| CN101155385A true CN101155385A (en) | 2008-04-02 |
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| CNA2006101524423A Withdrawn CN101155385A (en) | 2006-09-29 | 2006-09-29 | Communication system with improved frequency spectrum usage mode |
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| CN102378194A (en) * | 2010-08-20 | 2012-03-14 | 中国移动通信集团公司 | Link transmission method and device |
| CN103096326A (en) * | 2011-11-04 | 2013-05-08 | 中兴通讯股份有限公司 | Information channel collocation method and system for inhibiting out-of-band leakage interference |
| WO2013149387A1 (en) * | 2012-04-05 | 2013-10-10 | Renesas Mobile Corporation | Apparatus and method for accessing unlicensed band with network assistance |
| CN104469914A (en) * | 2014-12-10 | 2015-03-25 | 宇龙计算机通信科技(深圳)有限公司 | Channel detection method and system, base station and terminal |
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| CN102378194A (en) * | 2010-08-20 | 2012-03-14 | 中国移动通信集团公司 | Link transmission method and device |
| CN103096326A (en) * | 2011-11-04 | 2013-05-08 | 中兴通讯股份有限公司 | Information channel collocation method and system for inhibiting out-of-band leakage interference |
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| US9706433B2 (en) | 2012-04-05 | 2017-07-11 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Apparatus and method for accessing unlicensed band with network assistance |
| WO2013149387A1 (en) * | 2012-04-05 | 2013-10-10 | Renesas Mobile Corporation | Apparatus and method for accessing unlicensed band with network assistance |
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| WO2015103734A1 (en) * | 2014-01-07 | 2015-07-16 | 华为技术有限公司 | Method, system and device for performing downlink transmission |
| CN105009622B (en) * | 2014-01-07 | 2020-02-14 | 华为技术有限公司 | Method, system and equipment for downlink transmission |
| CN105009622A (en) * | 2014-01-07 | 2015-10-28 | 华为技术有限公司 | Method, system and device for performing downlink transmission |
| US10237748B2 (en) | 2014-01-07 | 2019-03-19 | Huawei Technologies Co., Ltd. | Method, system, and device for downlink transmission |
| CN104469914B (en) * | 2014-12-10 | 2018-05-15 | 宇龙计算机通信科技(深圳)有限公司 | Channel detection method and system, base station and terminal |
| CN104469914A (en) * | 2014-12-10 | 2015-03-25 | 宇龙计算机通信科技(深圳)有限公司 | Channel detection method and system, base station and terminal |
| CN104507108A (en) * | 2014-12-19 | 2015-04-08 | 宇龙计算机通信科技(深圳)有限公司 | Method for indicating idle state of channel or reserving resources, system, terminal and base station |
| CN104507108B (en) * | 2014-12-19 | 2019-03-08 | 宇龙计算机通信科技(深圳)有限公司 | The instruction of channel clear or method for obligating resource, system, terminal and base station |
| CN105743626A (en) * | 2014-12-30 | 2016-07-06 | 北京三星通信技术研究有限公司 | Downlink channel and/or downlink reference signal receiving method and apparatus |
| CN105743626B (en) * | 2014-12-30 | 2020-09-15 | 北京三星通信技术研究有限公司 | Method and equipment for receiving downlink channel and/or downlink reference signal |
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