CN101415275B - Method and system for inducting outer feedback in TDD aerial interface - Google Patents
Method and system for inducting outer feedback in TDD aerial interface Download PDFInfo
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- CN101415275B CN101415275B CN 200710164256 CN200710164256A CN101415275B CN 101415275 B CN101415275 B CN 101415275B CN 200710164256 CN200710164256 CN 200710164256 CN 200710164256 A CN200710164256 A CN 200710164256A CN 101415275 B CN101415275 B CN 101415275B
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Abstract
The invention discloses a method for introducing outer zone feedback into a time division duplex air interface. The method comprises the following processes: an air interface structures a service channel on a first unpaired spectrum which is used in a time-division manner in two directions, and the air interface structures a feedback channel and/or a control channel on a second unpaired spectrum which is used in a time-division manner in two directions. In addition, a system which corresponds to the method is also provided. The air interface has the advantages of reserving the channel reciprocity of TDD, the flexibility of downlink and uplink services and the like; in addition, the air interface has various advantages brought by the low feedback latency of half-duplex FDD. In particular, when the air interface is applied to the double layer and double frequency wireless access network, the capability of supporting a high-speed mobile terminal of a micro-cell wireless contact can be improved.
Description
Technical field
The present invention relates to wireless communication field, relate in particular to and introduce the method and system of feedback in addition in the time division duplex air interface.
Background technology
Duplex mode is one of feature of distinguishing conventional wireless system, it is also a principal element that determines the wireless system basic capacity, the duplex mode that many performances and its of system adopt is closely related, for example, the use ability of system's flexibility, terminal and base station complexity that frequency spectrum is used, channel information, networking capability, interworking between network ability and to the tenability of moving velocity of terminal.
The duplex mode that the existing communication system adopts mainly contains three kinds: pure time division multiple access (TimeDivision Duplex is called for short TDD) mode, for example TD-SCDMA system; Pure frequency division multiple access (Frequency Division Duplex, be called for short FDD) mode, for example WCDMA system; And half-duplex FDD (Half Frequency Division Duplex) mode, for example gsm system.
The major advantage of pure TDD mode is: need not paired frequency spectrum, be convenient to frequency planning; The Receiver And Transmitter channels designs is simple; And be convenient to utilize property of channel reciprocity may, make the simplicity of design of smart antenna.But there is following shortcoming in it: the excessive time-frequency spectrum service efficiency in overlay area is lower than the FDD mode; And support the high-speed mobile aspect not as the FDD mode.
The major advantage of pure FDD mode is: be fit to support high-speed mobile; And suitable large overlay area.But there is following shortcoming in it: need paired frequency spectrum, bring the difficulty in frequency spectrum planning; The use of property of channel reciprocity may has difficulties, and makes the design difficulty of smart antenna strengthen; And the up-downgoing frequency spectrum uses underaction when supporting non-symmetrical service.
Half-duplex FDD and pure FDD compare, and its advantage is: terminal transmitting-receiving time-sharing work causes terminal passageway simple in structure, and cost compare is low; And the functions such as time-multiplexed introducing causes, measurement, switching realize easy.But the up-downgoing frequency spectrum uses underaction when supporting non-symmetrical service.
at present, various duplex modes have been carried out comparatively comprehensively assessment in the field of study, " arrangement of duplex mode in following broadband wireless interface (Duplex arrangements for future broadband radiointerfaces.IST-2003-507581 WINNER D2.5 v1.0) " assesses 7 kinds of possible duplex modes as the report in the IST of European Union (informationized society technology) project: pure FDD, pure TDD, half-duplex FDD (GSM), introduce TDD in the FDD uplink spectrum, introduce TDD in the FDD downstream spectrum, the mixing FDD (Band switched FDD Hybrid) that frequency band switches, and use the double frequency-band of double T DD frequency spectrum to mix duplex (Dual band TDD Hybrid).In addition, this report is also discussed code division multiple access.The purpose of these researchs is to seek new duplex mode or seeks existing TDD, FDD duplex mode are carried out the effectively mode of combination, thereby reaches the advantage of utilizing TDD and FDD and the shortcoming of avoiding TDD and FDD.
The mixing FDD (Band switchedFDD Hybrid) that the frequency band that WINNER D2.5 v1.0 provides switches uses a pair of frequency band A and frequency band B.Within first time period, be used for descending at frequency range A for frequency range B in up, after finishing time period, reaches first before second time period begin, the transceiver channel of wireless terminal and base station is completed switching between frequency range A and frequency range B, in second time period, be used for up at frequency range A for frequency range B in descending.The implementation method of this technology is disclosed at U.S. Patent application 20050243748 " frequency band that is used for relevant beam shaping in full-duplex wireless communication systems switches (Band switching for coherentbeam forming in full-duplex wireless communication) ".
The double frequency-band that WINNER D2.5 v1.0 provides mixes duplex (Dual band TDDHybrid) and uses paired TDD frequency spectrum, and this frequency spectrum usage mode duplex mode in the cards has pure TDD and half-duplex (half duplex=(T+F) DD).
The discussion of TDD, FDD duplex mode has also appearred in existing a lot of patented technologies or patent application and has used flexibly.
Exercise question has provided a kind of by the patent application US20050174954 of " moving the method (Method of operating a TDD/virtual FDD hierarchical cellulartelecommunication system) of the virtual FDD hierarchical cellular of a TDD/ communication system " in the situation that the TDD system is covered by the FDD system, use remainder in the uplink spectrum of FDD as the data feedback channel of terminal FDD working method, use the TDD frequency spectrum as the down going channel of terminal FDD working method, so just form the FDD duplex mode of " virtual ".It is the remainder that takes full advantage of in the uplink spectrum of FDD that this patent is used main benefit that the remainder in the uplink spectrum of FDD obtains.
The system that patent application " a kind of Integrated using in pairs and the system and method for non-paired frequency spectrum " (application number: 200610003173.4 ") provides comprises: will paired FDD frequency spectrum and the processing combination of resources of non-paired TDD frequency spectrum and correspondence thereof the get up base station of integrated dispatch, have the terminal of multiple duplex mode.The method to FDD frequency spectrum and TDD frequency spectrum integrated dispatch that this patent application provides is: high-speed mobile user is to use paired frequency spectrum as main, the low speed mobile subscriber is to use non-paired frequency spectrum as main, when paired frequency spectrum and non-paired frequency spectrum separately during the finishing service demand, just in pairs and non-paired frequency spectrum the business that provides is provided.
(application number: the system of the raising tdd systems uplink capacity that 200620169883.4) provides comprises two-way frequency spectrum and the descending unidirectional frequency spectrum that base station, terminal and base station and terminal communication are used in patent application " a kind of method that improves the tdd systems uplink feedback capability ".Wherein, the base station also is used for sending feedback information at descending unidirectional frequency spectrum to terminal; Terminal also is used for receiving the feedback information that the base station sends on descending unidirectional frequency spectrum, and terminal receives signal at receiving and transmitting signal on two-way frequency spectrum with on descending unidirectional frequency spectrum and carries out in the mode of time-division.Use two time division duplex frequency spectrums to realize concrete grammar with external feedback but this invention provides, also be not given under the Layered Space mouth structure implementation method with external feedback.
(application number: the system of the raising TDD system descending ability that 200620171582.5) provides comprises two-way frequency spectrum and the up unidirectional frequency spectrum that base station, terminal and base station and terminal communication are used in patent application " a kind of method that improves the TDD system descending feedback capability ".Terminal also is used for sending to the base station feedback information on up unidirectional frequency spectrum; The base station also is used for the feedback information that receiving terminal sends on up unidirectional frequency spectrum, and terminal two-way frequency spectrum receive signal and on up unidirectional frequency spectrum transmitted signal carry out in the mode of time-division.This invention has identical shortcoming with patent application 200620169883.4.
The mixing FDD that the frequency band that WINNER D2.5 v1.0 provides switches has following shortcoming and is: although kept the property of channel reciprocity may of TDD, do not possess TDD in the flexibility of supporting that the non-symmetrical service time-frequency spectrum is used.In addition, this duplex mode also has following shortcoming: can be as pure TDD, in the situation that system loses between strict synchronous generation frequency band and the interference in frequency band; And can as pure FDD, require terminal and base station to use complicated duplexer.
The double frequency-band that WINNER D2.5 v1.0 provides mixes duplex (Dual band TDDHybrid) although may realize pure TDD and half-duplex (halfduplex=(T+F) DD).But its pure TDD duplex mode exists feedback delay less than the inherent defect of wireless frame period; And its half-duplex does not possess TDD in the flexibility of supporting that the non-symmetrical service time-frequency spectrum is used.
In a word, existing basic shortcoming of mixing duplex technology is: otherwise TDD mode frame structure still exists the restriction of feedback delay; The limitation of FDD on the tenability of non-symmetrical service still exists.Lack a kind of TDD that both kept in the flexibility of channel reciprocity, up-downgoing business and the simplicity of duplexer, also have the so a kind of duplex method of low feedback delay of FDD concurrently.
Summary of the invention
In order to solve the existing problem of prior art, the present invention is proposed.
According to an aspect of the present invention, provide a kind of method of feedback in addition of introducing in the time division duplex air interface, the method comprises following processing: air interface builds Traffic Channel on the first non-paired frequency spectrum with the two-way use of time division way; And air interface builds feedback channel and/or control channel on the second non-paired frequency spectrum of the two-way use of time division way.
Wherein, feedback channel and/or control channel are used for carrying one or more of following information: power control instruction, dispatch command, re-send request may and channel information data.
Building wireless contact to the method for the Traffic Channel of terminal on the first non-paired frequency spectrum of the two-way use of time division way is to use the descending time slot of the first radio frames on the first frequency band to arrange Traffic Channel, and is to use the ascending time slot of the first radio frames on the first frequency band to arrange Traffic Channel building the method for terminal to the Traffic Channel of wireless contact on the first non-paired frequency spectrum; Be to use the descending time slot of the second radio frames on the second frequency band to arrange feedback channel and/or control channel building wireless contact to the feedback channel of terminal and/or the method for control channel on the second non-paired frequency spectrum, and be to use the ascending time slot of the second radio frames on the second frequency band to arrange feedback channel and/or control channel building terminal to the feedback channel of wireless contact and/or the method for control channel on the second non-paired frequency spectrum.
Wherein, use wireless contact to feedback channel and/or the control channel of terminal to comprise the following steps: in very first time interval, terminal uses the service channel that is arranged on the first frequency band to complete data transmission one time to wireless contact; In the second time interval, terminal receives feedback and the control data that wireless contact is sent on the feedback channel on the second frequency band and/or control channel; In the 3rd time interval, terminal is according to feedback and/or control the mode of operation adjustment that data are carried out necessity; And in the 4th time interval, terminal is carried out data transmission next time in the Traffic Channel that is arranged on the first frequency band.
In addition, use terminal to feedback channel and/or the control channel of wireless contact to comprise the following steps: in very first time interval, wireless contact uses the service channel that is arranged on the first frequency band to complete data transmission one time to terminal; In the second time interval, the wireless contact feedback that receiving terminal is sent on the feedback channel on the second frequency band and/or control channel and control data; In the 3rd time interval, wireless contact is according to feedback and/or control the mode of operation adjustment that data are carried out necessity; And in the 4th time interval, wireless contact carries out data transmission next time in the Traffic Channel that is arranged on the first frequency band.
Feedback and/or control data and comprise at least a in following information: transmitting power control information, dynamic scheduling information, retransmission of information, channel quality information and self-adapting modulation coding information automatically.
According to a further aspect in the invention, a kind of system of feedback in addition that introduces in the time division duplex air interface is provided, this system comprises: the wireless contact of at least one first kind, and the wireless contact of the first kind works on the second frequency band, and uses the second time division duplex wireless frame structure; The wireless contact of at least one Equations of The Second Kind, the wireless contact of Equations of The Second Kind works on the first frequency band, and uses the first time division duplex wireless frame structure; At least one wireless terminal is used for using the wireless contact of the first frequency band and Equations of The Second Kind to keep being connected and uses the wireless contact of the second frequency band and the first kind to keep being connected; And at least one communication process and control unit, link with the wireless contact of the first kind and the wireless contact of Equations of The Second Kind, be used for realizing emission and/or receive diversity control.
Set up the second wireless contact in the descending time slot of the first time division duplex wireless frame structure on the first frequency band to the Traffic Channel of terminal, and set up the Traffic Channel of the wireless contact of terminal to the second in the ascending time slot of the first time division duplex wireless frame structure; And set up the first wireless contact in the descending time slot of the second time division duplex wireless frame structure on the second frequency band to feedback channel and/or the control channel of terminal, and set up feedback channel and/or the control channel of the wireless contact of terminal to the first in the ascending time slot of the second time division duplex wireless frame structure.
Feedback channel on wireless terminal use the second frequency band and/or feedback and/or the control between control channel realization and the wireless contact of the first kind, and the Traffic Channel realization on wireless terminal use the first frequency band and the transfer of data between the wireless contact of Equations of The Second Kind.
The Traffic Channel that belongs to respectively the wireless contact of a plurality of Equations of The Second Kinds on wireless terminal use the first frequency band realizes transfer of data in the mode of diversity.
The Equations of The Second Kind contact is worked on the first frequency band and the second frequency band, and wireless terminal uses the wireless contact of a plurality of Equations of The Second Kinds to transmit feedback and/or control information with diversity mode on the second frequency band.
The wireless contact of Equations of The Second Kind is covered by the wireless contact of the first kind, and perhaps the overlay area of the overlay area of the wireless contact of Equations of The Second Kind and the wireless contact of the first kind exists overlapping.
Synchronous working in time between the wireless contact of the first kind and the wireless contact of Equations of The Second Kind, thereby realize the needed synchronized relation of transmit diversity.
The invention provides a kind of TDD that both kept in the flexibility of channel reciprocity, up-downgoing business and the simplicity of duplexer, also have the so a kind of duplex method of low feedback delay of FDD concurrently.By the present invention, the feedback interval of the signal of time division duplex frequency spectrum transmission is not subjected to the restriction of wireless frame period, can realize repeatedly feedback in a wireless frame period, thereby improves dynamic property and the throughput of system; Can under eating dishes without rice or wine coverage mode, bilayer make the wireless contact of Microcell support easily high speed mobile terminal; And be easy to realize under existing frequency spectrum planning.
Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from specification, 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 writing, claims and accompanying drawing.
Description of drawings
Accompanying drawing is used to provide a further understanding of the present invention, and consists of the part of specification, is used for together with embodiments of the present invention explaining the present invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 illustrates according to the flow chart of the method for feedback in addition of introducing in the time division duplex air interface of the present invention;
Fig. 2 illustrates according to the introducing of the embodiment of the present invention schematic diagram with the time division duplexing method of feedback channels;
Fig. 3 illustrates according to the wireless contact of the embodiment of the present invention to send flow chart with the method for external feedback to wireless terminal;
Fig. 4 illustrates according to the wireless terminal of the embodiment of the present invention to send flow chart with the method for external feedback to wireless contact;
Fig. 5 illustrates according to the use of the embodiment of the present invention diagram with the time division duplex wireless connecting system of external feedback;
Fig. 6 illustrates according to the introducing of the embodiment of the present invention diagram with the instantiation of the double-deck time division duplex wireless connecting system of feedback channels; And
Fig. 7 is the example that illustrates with the time division duplex wireless connecting system frequency spectrum usage mode of external feedback.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for description and interpretation the present invention, is not intended to limit the present invention.
Fig. 1 illustrates according to the flow chart of the method for feedback in addition of introducing in the time division duplex air interface of the present invention.
With reference to Fig. 1, according to the method for feedback in addition of introducing in the time division duplex air interface of the present invention, the method comprises following processing: S102, and air interface builds Traffic Channel on the first non-paired frequency spectrum with the two-way use of time division way; And S104, air interface builds feedback channel and/or control channel on the second non-paired frequency spectrum of the two-way use of time division way.
Wherein, feedback channel and/or control channel are used for carrying one or more of following information: power control instruction, dispatch command, re-send request may and channel information data.
Fig. 2 illustrates according to the introducing of the embodiment of the present invention schematic diagram with the time division duplexing method of feedback channels.
With reference to Fig. 2, (that is, f1) upper wireless contact to the method for the Traffic Channel of terminal that builds is that the descending time slot 201d of the radio frames 201 on service band f1 arranges Traffic Channel with the first non-paired frequency spectrum of the two-way use of time division way; And building the ascending time slot 201u arrangement Traffic Channel that the method for terminal to the Traffic Channel of wireless contact is the radio frames 201 on service band f1 on frequency band f1.
(that is, f2) upper wireless contact to the method for the feedback channel of terminal and/or control channel that builds is that radio frames 202 time slot 202d on service band f2 arrange feedback channel and/or control channels with the second non-paired frequency spectrum of the two-way use of time division way; And be ascending time slot 202u arrangement feedback channel and/or the control channel of the radio frames 202 on service band f2 building terminal to the feedback channel of wireless contact and/or the method for control channel on frequency band f2.
Fig. 3 illustrates according to the wireless contact of the embodiment of the present invention to send flow chart with the method for external feedback to wireless terminal.
With reference to Fig. 3, use wireless contact to feedback channel and/or the control channel of terminal to comprise the following steps: S301, in very first time interval, terminal uses the service channel that is arranged on frequency band f1 to complete data transmission one time to wireless contact; S302, in the second time interval, terminal receives feedback and the control data that wireless contact is sent on the feedback channel on frequency band f2 and/or control channel; S303, in the 3rd time interval, terminal is according to feedback and/or control the mode of operation adjustment that data are carried out necessity; And S304, in the 4th time interval, terminal is carried out data transmission next time in the Traffic Channel that is arranged on frequency band f1.
Fig. 4 illustrates according to the wireless terminal of the embodiment of the present invention to send flow chart with the method for external feedback to wireless contact.
With reference to Fig. 4, use terminal to feedback channel and/or the control channel of wireless contact to comprise the following steps: S401, in very first time interval, wireless contact uses the service channel that is arranged on frequency band f1 to complete data transmission one time to terminal; S402, in the second time interval, the wireless contact feedback that receiving terminal is sent on the feedback channel on frequency band f2 and/or control channel and control data; S403, in the 3rd time interval, wireless contact is according to feedback and/or control the mode of operation adjustment that data are carried out necessity; And S404, in the 4th time interval, wireless contact carries out data transmission next time in the Traffic Channel that is arranged on frequency band f1.
Feedback and/or control data and comprise at least a in following information: transmitting power control information, dynamic scheduling information, retransmission of information, channel quality information and self-adapting modulation coding information automatically.
Fig. 5 illustrates according to the use of the embodiment of the present invention diagram with the time division duplex wireless connecting system of external feedback.
With reference to Fig. 5, introduce in the time division duplex air interface in addition according to according to the present invention that the system of feedback comprises: at least one first kind is wireless contact 501, the wireless contact of the first kind work in the second frequency band (that is, and f2) on, and use time division duplex wireless frame structure 202; At least one Equations of The Second Kind is wireless contact 502, the wireless contact of Equations of The Second Kind work in the first frequency band (that is, and f1) on, and use time division duplex wireless frame structure 201; At least one wireless terminal 503 keeps being connected with wireless 502 contacts of Equations of The Second Kind for service band f1 and service band f2 keeps being connected with the wireless contact 501 of the first kind; And at least one communication process and control unit 504, link with the wireless contact 501 of the first kind and the wireless contact 502 of Equations of The Second Kind, be used for realizing emission and/or receive diversity control.
The first kind is wireless between contact 501 and wireless terminal 503, and the descending time slot of the time division duplex wireless frame structure 202 on service band f2 is set up wireless contact to feedback channel and/or the control channel of terminal; The first kind is wireless between contact 501 and wireless terminal 503, and the ascending time slot of the time division duplex wireless frame structure 202 on service band f2 is set up terminal to feedback channel and/or the control channel of wireless contact.
Equations of The Second Kind is wireless service band f between contact 502 and wireless terminal 503
1On the descending time slot of time division duplex wireless frame structure 201 set up wireless contact to the Traffic Channel of terminal; Equations of The Second Kind is wireless service band f between contact 502 and wireless terminal 503
1On the ascending time slot of time division duplex wireless frame structure 202 set up terminal to the Traffic Channel of wireless contact.
The fundamental mode of this system is: feedback and/or control between the feedback channel on wireless terminal 503 service band f2 and/or control channel realization and the wireless contact of the first kind, and the transfer of data between the realization of the Traffic Channel on service band f1 and the wireless contact of Equations of The Second Kind.
Further, the Traffic Channel that belongs to respectively the wireless contact of a plurality of Equations of The Second Kinds (as wireless contact 502a/502b in Fig. 5) on wireless terminal 503 service band f1 realizes transfer of data in the mode of diversity.
Further, the wireless contact 502 of Equations of The Second Kind can be worked on frequency band f1 and these two frequency bands of frequency band f2.In this case, feedback and/or the control channel of wireless terminal 503 on using f2 transmits feedback and/or control information, also uses the wireless contact of a plurality of Equations of The Second Kinds mode with diversity on frequency band f2 to transmit feedback and/or control information.
Equations of The Second Kind radio node 502 is covered by the wireless contact of the first kind 501 or the overlay area 505 of the overlay area 506 of the wireless contact of Equations of The Second Kind and the wireless contact of the first kind exists overlapping.
First kind radio node 501 can be a complete base station, can be also a physical entity that only has antenna and radio frequency unit.The antenna of the first kind is wireless contact 501 can be a kind of of following antenna structure: omnidirectional antenna, have antenna (as fan antenna), the array antenna of fixed-direction figure.
In addition, Equations of The Second Kind radio node 502 can be a complete base station, can be also a physical entity that only has antenna and radio frequency unit.The antenna of Equations of The Second Kind radio node 502 can be a kind of, the omnidirectional antenna of following antenna structure; Antenna (as fan antenna), array antenna with fixed-direction figure.
Equations of The Second Kind radio node 502 sends its identifying informations, and these information can be to send on broadcast channel, can be also to send at the coding by pilot channel, can be also that the pseudo-mode with sequence that superposes sends.
The laying mode of the antenna of Equations of The Second Kind radio node 502 can adopt outdoor cloth if indoor laying.
First kind radio node 501 with the space covering relation of the wireless contact of Equations of The Second Kind is: the first kind is wireless, and contact 501 covers some Equations of The Second Kind WAP (wireless access point) 502, the Equations of The Second Kind WAP (wireless access point) 501 that perhaps exists some its overlay areas 506 and first kind coverage range of wireless access point 505 to overlap mutually.
First kind radio node 501 with the difference of the wireless contact 502 of Equations of The Second Kind is: the first kind is wireless, and contact 501 has larger transmitting power with respect to the wireless contact 502 of Equations of The Second Kind; And the antenna height of the wireless contact 501 of the first kind is greater than the antenna height of the wireless contact 502 of Equations of The Second Kind.
Link between the wireless contact of first kind radio node and Equations of The Second Kind can be following a kind of: fiber channel, metal channel and wireless channel.
And synchronous working in time between first kind radio node and the wireless contact of Equations of The Second Kind, in order to realize the needed synchronized relation of transmit diversity, for example, realize single frequency network diversity mode or the empty minute required synchronized relation of emission diversity (STTD) between first kind radio node and the wireless contact of Equations of The Second Kind.
Fig. 6 illustrates according to the introducing of the embodiment of the present invention diagram with the instantiation of the double-deck time division duplex wireless connecting system of feedback channels.
With reference to Fig. 6, this system comprises: several first kind are wireless contact 501, and the first kind here is wireless, and contact 501 has adopted array antenna, and this array antenna can be worked in the mode of wave beam forming; Several Equations of The Second Kinds are wireless contact 502, the Equations of The Second Kind here is wireless, and contact adopts is omnidirectional antenna; Several wireless terminals 503, this terminal have the ability that three classes detection collection are surveyed: the detection collection that is used for the macrocell switching of contact formation that the first kind is wireless; The interlayer transmission diversity of contact formation that Equations of The Second Kind is wireless is surveyed collection; And the interlayer transmission diversity of the wireless contact of the first kind and the wireless contact formation of Equations of The Second Kind is surveyed collection.The wireless contact of each first kind and the wireless contact of several Equations of The Second Kinds and communication process and control unit 504 are linked, in communication process and control unit 504, except realizing the wireless contact of the first kind, the needed Base-Band Processing function of the wireless contact of Equations of The Second Kind, node communication and the control unit 601 of communication and control between the wireless contact of Equations of The Second Kind and baseband processor have also been realized being used for, further, in communication process and control unit 504, emission and or receive diversity control have been realized.
Node communication in the present embodiment is processed with control unit 601 according to shared common wireless interface standard CPRI (Common Public Radio Interface) Specification design, can realize easily synchronizeing between baseband processing unit (be in the CPRI standard wireless device control (REC) node) and the wireless contact of Equations of The Second Kind (being wireless device control (RE) node in the CPRI standard), transfer of data, mode of operation control.
In this routine described two-layer system, some first kind are wireless, and contact 501 consists of the ground floor covering, its working band is f2, at the region memory of each first kind coverage at the wireless contact 102 of the Equations of The Second Kind of some continuous coverings, its working band is f1, and the second layer of the double-deck mobile communication system of contact formation that these Equations of The Second Kinds are wireless covers.Feedback on the wireless terminal service band f2 of the time division duplex data channel on service band f1 and/or control channel transmit feedback and/or control information.
Mobile terminal is surveyed near the wireless contact 502 that may be used for diversity communication it on frequency band f1 under the control of communication process and control unit 501.
When mobile interruption moved to A place, position, communication process and control unit 501 carried out the processing of following 2 aspects.On the one hand, communication process and control unit 501 are according to identifier and the address of the wireless contact in the diversity communication active set, transmit by the control information of the wireless contact 501 of the first kind between the feedback on frequency band f2 and/or control channel realization and wireless terminal, these control informations comprise one of following information at least: adaptive coding and modulating information, schedule information, power control information, interference coordination information; On the other hand, Traffic Channel and a plurality of Equations of The Second Kinds wireless contact time of wireless terminal 503 by the time division duplex on service band f1 communicates in the mode of diversity.Here, the result that communication process and control unit 501 report according to wireless terminal 503 is determined the diversity communication active set of this wireless terminal when the A of position, and the active set of position A comprises: Equations of The Second Kind contactless 502h, 502i, 502j.So communication process and control unit 501 utilize wireless contact 502h, 502i, 502j to send business datum in the mode of single frequency network diversity (each the wireless contact in active set sends business datum in the mode of time synchronized, Frequency Synchronization, bit synchronous) diversity to wireless terminal.
When wireless terminal 503 moves to B place, position, communication process identical treatment step when carrying out with position A with control unit 501, still, the diversity communication active set of this moment comprises: Equations of The Second Kind is wireless contact 502k, 502l.
In the present embodiment, the wireless contact of described Equations of The Second Kind utilizes the site resource of Personal Handyphone System (PHS:PersonalHandy-phone System) to install, and the site resource of utilization comprises following one or more: site, base station, supplied for electronic system, wire link, optical fiber contact.
The present embodiment is take the interior transmit diversity of implementing the single frequency network mode of interlayer and layer as example, according to same networking mode and active set metering system, also can implement the transmit diversity of other modes, divides the emission diversity as sky.
The present embodiment is to implement Open-Loop Transmit Diversity as example take interlayer, according to same networking mode and active set metering system, also can implement Closed-Loop Transmit Diversity.
Frequency range f1 in the present embodiment can be any one section TDD frequency spectrum in frequency range 705 to 709 in Fig. 7, also can use the frequency spectrum that is allocated at present ground TV broadcast, comprise the part in VHF:174MHz～230MHz, UHF:470MHz～798MHz.Frequency range f1 can be also the licensed band of exempting from of WLAN (wireless local area network) use.
By technical scheme of the present invention, the feedback interval of the signal of time division duplex frequency spectrum transmission is not subjected to the restriction of wireless frame period, can realize repeatedly feedback in a wireless frame period, thereby improves dynamic property and the throughput of system; Can under eating dishes without rice or wine coverage mode, bilayer make the wireless contact of Microcell support easily high speed mobile terminal; And be easy to realize under existing frequency spectrum planning.
In a word, the air interface that the present invention provides is except the advantages such as flexibility of the channel reciprocity that kept TDD and up-downgoing business, also have the various advantages that the low feedback delay of half-duplex FDD brings concurrently, particularly when being applied to double-deck double-frequency wireless Access Network, can improve the wireless contact of Microcell to the tenability of high speed mobile terminal.
these are only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations, such as, when the Equations of The Second Kind radio node is worked with time division duplex with the work of Frequency Division Duplexing (FDD) mode when first kind radio node, the time division duplex Traffic Channel of setting up between Equations of The Second Kind radio node and wireless terminal can the uplink/downlink frequency spectrum at first kind radio node with feedback channels on build respectively: the downstream feedback passage of the time division duplex Traffic Channel of setting up between Equations of The Second Kind radio node and wireless terminal (sending feedback information to terminal from first kind radio node) utilizes the downstream spectrum of Frequency Division Duplexing (FDD) to build, the uplink feedback passage of the time division duplex Traffic Channel of setting up between Equations of The Second Kind radio node and wireless terminal (sending feedback information from terminal to first kind radio node) utilizes the uplink spectrum of Frequency Division Duplexing (FDD) to build.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (6)
1. introduce the method for feedback in addition for one kind in the time division duplex air interface, it is characterized in that, described method comprises following processing:
Described air interface builds Traffic Channel on the first non-paired frequency spectrum with the two-way use of time division way; And
Described air interface builds the feedback channel of described Traffic Channel and/or the control channel of described Traffic Channel on the second non-paired frequency spectrum of the two-way use of time division way.
2. method according to claim 1, is characterized in that, described feedback channel and/or control channel are used for carrying one or more of following information: power control instruction, dispatch command, re-send request may and channel information data.
3. method according to claim 1, it is characterized in that, be to use the descending time slot of the first radio frames on the first frequency range to arrange described Traffic Channel building the method for wireless contact to the Traffic Channel of terminal on the described first non-paired frequency spectrum, and be to use the ascending time slot of described the first radio frames on described the first frequency range to arrange described Traffic Channel building the method for terminal to the Traffic Channel of wireless contact on the described first non-paired frequency spectrum; Be to use the descending time slot of the second radio frames on the second frequency band to arrange described feedback channel and/or control channel building wireless contact to the feedback channel of terminal and/or the method for control channel on the described second non-paired frequency spectrum, and be to use the ascending time slot of described the second radio frames on described the second frequency band to arrange described feedback channel and/or control channel building terminal to the feedback channel of wireless contact and/or the method for control channel on the described second non-paired frequency band.
4. method according to claim 3, it is characterized in that, use described wireless contact to feedback channel and/or the control channel of terminal to comprise the following steps: in very first time interval, described terminal uses the Traffic Channel that is arranged on described the first frequency band to complete data transmission one time to described wireless contact;
In the second time interval, described terminal receives feedback and/or the control data that described wireless contact is sent on the feedback channel on described the second frequency band and/or control channel;
In the 3rd time interval, described terminal is according to described feedback and/or control the mode of operation adjustment that data are carried out necessity; And
In the 4th time interval, described terminal is carried out data transmission next time in the Traffic Channel that is arranged on described the first frequency band.
5. method according to claim 3, is characterized in that, uses described terminal to feedback channel and/or the control channel of wireless contact to comprise the following steps:
In very first time interval, described wireless contact uses the Traffic Channel that is arranged on described the first frequency band to complete data transmission one time to described terminal;
In the second time interval, described wireless contact receives feedback and/or the control data that described terminal is sent on the feedback channel on described the second frequency band and/or control channel;
In the 3rd time interval, described wireless contact is according to described feedback and/or control the mode of operation adjustment that data are carried out necessity; And
In the 4th time interval, described wireless contact carries out data transmission next time in the Traffic Channel that is arranged on described the first frequency band.
6. according to claim 4 or 5 described methods, it is characterized in that described feedback and/or control data and comprise at least a in following information: transmitting power control information, dynamic scheduling information, retransmission of information, channel quality information and self-adapting modulation coding information automatically.
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| US9497717B2 (en) * | 2014-05-23 | 2016-11-15 | Ruckus Wireless, Inc. | Out-of-band acknowledgement of wireless communication |
| US10368361B2 (en) | 2014-08-01 | 2019-07-30 | Empire Technology Development Llc | Adaptive communication resource allocation in a wireless network |
| CN105510853B (en) * | 2015-11-24 | 2018-12-11 | 深圳怡化电脑股份有限公司 | A kind of time-delay measuring method and system of magnetic sensor |
| US11153006B2 (en) | 2018-02-14 | 2021-10-19 | Apple Inc. | Uplink transmission puncturing to reduce interference between wireless services |
| CN112995921B (en) * | 2021-05-10 | 2021-09-07 | 北京理工大学 | Low-delay double-channel communication method and system based on time division multiple access |
| WO2023184557A1 (en) * | 2022-04-02 | 2023-10-05 | 北京小米移动软件有限公司 | Information processing method and apparatus, and communication device and storage medium |
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