CN1960352A - Wireless transfer communication system and method based on OFDMA FDD - Google Patents
Wireless transfer communication system and method based on OFDMA FDD Download PDFInfo
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Abstract
The system thereof comprises: BS (base station), RS (relay station) and UE (user end). The method thereof comprises: setting a downlink relay area and uplink relay area in the downlink subframe and uplink subframe of physical layer frame structured of BS in downlink OFDMA system by using TDM (time division multiplexing) approach; setting the downlink relay area and uplink area in the uplink subframe and downlink subframe of OFDMA-FDD radio transceiver physical layer structure in order to define the combination of relay subchannel and OFDMA symbols between the BS and RS; next; based on the uplink and down link physical layer structure of BS and RS between the BS, RS and UE, FDD is used to make radio relay communication.
Description
Technical field
The present invention relates to wireless communication technology field, relate in particular to a kind of wireless transfer communication system and method based on OFDMA-FDD.
Background technology
IEEE 802.16 is first broadband wireless access standard, and this standard mainly comprises two versions: one is the broadband fixed wireless access version 802.16-2004 of 802.16 standards, and another is the broadband mobile wireless access version 802.16e of 802.16 standards.In the 802.16-2004 standard, only define two kinds of network elements, be specially BS (base station) and SS (subscriber station); In the 802.16e standard, equally also only define two kinds of network elements, be specially BS and MSS (mobile subscriber station).
802.16Multihop Relay SG (802.16 multi-hop transfer seminar) has only proposed the notion of the RS (terminal) of WiMAX (micro-wave access to global intercommunication) at present, the important effect of described RS is as the transfer communication entity between BS and SS/MSS, thereby enlarges the coverage of BS or the throughput of increase subscriber station.
In addition, at present, in communication system, communicate as adopting OFDM (OFDM) or OFDMA (OFDM access) technology in 802.16 systems usually.In a channel (Channel) of OFDM or OFDMA system, its OFDM or OFDMA symbol are made of subcarrier (Subcarrier), and the number of subcarrier has determined counting of FFT conversion.The subcarrier of forming a subchannel (Subchannel) can be adjacent, also can be non-conterminous, and Fig. 1 has provided the adjacent example of subcarrier.
In communication system, subcarrier can be divided into following several by the kind that transmits data:
1, data subcarrier: the subcarrier that is used to pass data;
2, pilot sub-carrier: be used to conduct subcarrier frequently;
3, gap carrier wave: be not used in the subcarrier that passes any number, comprise boundary belt (Guard Band) and direct current subcarrier (DC Subcarrier).
In OFDM or OFDMA system, different users divides the FFT of up link (fast Fourier transform) space, and each user is transmitted on one or more subchannels.The division of subchannel is a kind of FDMA mode, and all effective subcarriers are divided into some sub-carrier set, and each sub-carrier set is called a subchannel (subchannel).
In dividing the subchannel process, mainly adopt following three kinds of methods:
First kind is that carrier wave is divided into continuous group, this implement the simplest, and adjacent sub-channel disturb less, but the effect of the frequency diversity that acquires is relatively poor.
Second kind is that the carrier wave of different subchannels interweaves in the mode of rule, and this frequency diversity effect is better, but system's antithetical phrase interchannel interference is comparatively responsive.
The third is the improvement to second kind, and promptly the carrier wave of different subchannels interweaves in pseudorandom mode, has reduced interference between the base station thereby use different sequences to change sign indicating number by different base station.
In 802.16 standards, for authorizing frequency range, duplex mode can be FDD (Frequency Division Duplexing (FDD)) and TDD (time division duplex), and the SS of FDD mode can be half-duplex FDD, and for the frequency range of exempting to authorize, duplex mode can only be TDD.802.16OFDMA under the FDD (or SOFDMA) frame structure, as shown in Figure 2.In 802.16OFDMA (or SOFDMA) mode, the PHY burst (burst) among the OFDMA (or SOFDMA) has been assigned with one group of adjacent subchannel and one group of OFDMA symbol (symbol).
The data of transmitting on physical channel are with the form transmission of frame (Frame).Every frame comprises descending sub frame (DL subframe is abbreviated as DL among Fig. 2) and sub-frame of uplink (UL subframe is abbreviated as DL among Fig. 2).Under the fdd mode, descending sub frame and sub-frame of uplink adopt the different frequency transmission, and in Fig. 2, DL adopts frequency f 1, and UL adopts frequency f 2.
A burst can distribute to a SS/MSS (or one group of user) up, can issue SS/MSS as a transmitting element by BS descending.Initial access range finding Ranging, the Perodic ranging Ranging of up SS, bandwidth request etc. are all undertaken by Ranging subchannel.Descending sub frame has a lead code (preamble) beginning, and it is synchronous to be used for physics; Be FCH afterwards, be used for specifying the profile and the length thereof that follow the one or more descending Burst after FCH closely.Be DL-MAP (descending mapping table) and UL-MAP (up mapping table) message then, DL-MAP is used for subchannel and OFDMA character position and the using method (profile) of each burst of indicating downlink, and UL-MAP is used to indicate subchannel and OFDMA character position and the using method (profile) of up each burst.
Though above-mentioned OFDM or OFDMA technical pattern can satisfy the communication needs in the communication system,, for the transfer communication system that comprises RS, also there is not relevant art can satisfy the needs of corresponding transfer communication at present.
Summary of the invention
The purpose of this invention is to provide a kind of wireless transfer communication system and method, in communication system, realizing transfer communication, and can effectively avoid the various interference that may exist based on RS based on two OFDMA-FDD.
The objective of the invention is to be achieved through the following technical solutions:
The invention provides a kind of wireless transfer communication system based on OFDMA-FDD, comprise base station BS, terminal RS and user terminal, described RS provides the interface with BS and user terminal communication respectively, and in described RS, comprise an OFDMA-FDD transceiver and the 2nd OFDMA-FDD transceiver, wherein, the OFDMA-FDD wireless receiver physical layer element in the OFDMA-FDD transmitting set physical layer element that comprises of the OFDMA-FDD transceiver among the RS and an OFDMA-FDD wireless receiver physical location and the user terminal and OFDMA-FDD transmitting set physical layer element is corresponding and keep receiving frame synchronous; OFDMA-FDD wireless receiver physical layer element among the 2nd OFDMA-FDD transmitting set physical layer element that the 2nd OFDMA-FDD transceiver among the RS comprises and the 2nd OFDMA-FDD wireless receiver physical location and the BS and OFDMA-FDD transmitting set physical layer element is corresponding and keep receiving frame synchronous.
Also be provided with the wire transmission processing unit that is connected with upper level equipment among the described BS.
Also be respectively arranged with corresponding OFDMA-FDD transceiver data-link layer unit in described BS, RS and the user terminal.
Described BS also provides the interface with user terminal communication, described BS is by adopting predetermined chnnel coding and modulation system, perhaps, adopt predetermined transmission power level that lead code Preamble, frame control head FCH, descending mapping table DL-MAP and up mapping table UL-MAP information are directly sent to user terminal from this interface.
It is a kind of in the method that realizes wireless transfer communication that the present invention also provides, and comprising:
A, in the descending sub frame of the base station BS physical layer frame structure of OFDMA system and sub-frame of uplink, adopt the time division multiplexing tdm mode that descending transfer district and up transfer district are set respectively, in the sub-frame of uplink of terminal RS the 2nd OFDMA-FDD transceiver physical layer frame structure and descending sub frame, descending transfer district and up transfer district are set respectively, are used to define rotor channel and OFDMA symbol combination between BS and the RS;
B, the uplink and downlink physical layer frame based on the BS of described setting and RS between BS, RS and user terminal adopt FDD to carry out wireless transfer communication.
Described steps A also comprises:
During the up transfer district of BS correspondence, user terminal is not provided with and sends subchannel and OFDMA symbol combination, and RS is not provided with any reception subchannel and OFDMA symbol combination; During the descending transfer district of BS correspondence, RS is not provided with any transmission subchannel and OFDMA symbol combination.
Among the present invention, when having a plurality of RS, share downlink or uplink transfer district by different subchannels and OFDMA symbol combination between the 2nd OFDMA-FDD transceiver of a plurality of RS, different RS the 2nd OFDMA-FDD transceivers only receives or sends data in corresponding subchannel and the OFDMA symbol combination in downlink or uplink transfer district.
Described steps A comprises:
In the descending transfer district of the descending sub frame of the physical frame structure of BS, descending transfer broadcast sub-channels is set, is used to define down channel and the OFDMA symbol combination that is broadcast to RS by BS, broadcast corresponding broadcasting packet;
In the descending transfer district of the sub-frame of uplink of the physical frame structure of the 2nd OFDMA-FDD transceiver of RS, descending transfer broadcast sub-channels is set, be used to define up subchannel of RS and the OFDMA symbol combination that receives the descending transfer broadcast channel of BS, receive corresponding broadcasting packet.
Described steps A also comprises:
Transfer range finding subchannel is set in the descending sub frame of the physical layer frame structure of BS, is used to define initial access range finding, the Perodic ranging of RS, the BS transfer range finding of bandwidth request receives subchannel and OFDMA symbol combination;
The transfer range finding is set in the descending sub frame of the physical layer frame structure of RS the 2nd OFDMA-FDD transceiver sends subchannel, be used to define initial access range finding, the Perodic ranging of RS, the RS transfer range finding of bandwidth request sends subchannel and OFDMA symbol combination.
The transfer range finding subchannel of described BS and the transfer range finding of RS send the corresponding setting of subchannel, and keep strict synchronism.
Described steps A also comprises:
At BS, or in the physical layer frame structure downlink frame of BS and RS the one OFDMA-FDD transceiver descending frame head is set, specifically be arranged at the zero hour of descending sub frame, be used to define subchannel that sends user's synchronizing information and subchannel and the OFDMA symbol combination that sends indication information, be used to indicate BS, or the position of each subchannel of BS and RS physical layer frame structure downlink frame and uplink frame and using method profile, wherein, the descending frame head of the OFDMA-FDD transceiver of RS lags behind the descending frame head of BS in time, and during the descending frame head of the OFDMA-FDD transceiver of RS, BS can not be provided with descending sub frame and send subchannel and OFDMA symbol combination.
Described descending sub frame comprises:
Lead code preamble in OFDM or the single carrier frame, frame control head FCH burst, descending mapping table DL-MAP and/or up mapping table UL-MAP.
Described steps A also comprises:
The descending sub frame head of the OFDMA-FDD transmitting set of RS lags behind the descending frame head of BS in time, and during the descending frame head of RS, the descending sub frame of BS can not be arranged any transmission subchannel and OFDMA symbol combination;
And/or when having a plurality of RS, during the descending frame head of the OFDMA-FDD transceiver of RS, other RS the one FDD transceiver can not be provided with descending sub frame and send subchannel and OFDMA symbol combination;
Or,
When having a plurality of RS, the descending sub frame head of the OFDMA-FDD transceiver of different RS is overlapping fully in time, strict synchronism, and descending sub frame head content must be identical.
Described steps A also comprises:
In the downlink frame of the physical layer frame structure of the 2nd OFDMA-FDD transceiver of RS the descending sub frame head being set receives, be used to define subchannel and the OFDMA symbol combination that RS receives the BS descending frame head, and this descending frame head receives and the descending frame head of BS needs overlapping and strict synchronism fully.
Described steps A also comprises:
In the sub-frame of uplink of the physical layer frame structure of the OFDMA-FDD transceiver of BS and RS the range finding subchannel is set, the RS range finding that is received range finding, Perodic ranging, bandwidth request that is used to define user terminal receives subchannel and OFDMA symbol combination.
Described steps A also comprises:
Except that the OFDMA-FDD transmitting set of the descending transfer district of descending sub frame head, BS and RS was during the correspondence in the descending transfer district of the descending sub frame head of BS, BS, BS and different RS shared the remaining part of descending sub frame by different subchannels and OFDMA symbol combination in the descending sub frame of the physical layer frame structure of the OFDMA-FDD transceiver of BS or RS.
Described steps A comprises:
In the sub-frame of uplink of the physical layer frame structure of the OFDMA-FDD wireless receiver of BS or RS, except that the OFDMA-FDD wireless receiver of the up transfer district of BS and RS was during the up transfer district of BS correspondence, BS met the remainder that sub-frame of uplink is shared in combination with different RS by different subchannels and OFDMA.
Described steps A comprises:
Except that descending frame head, range finding subchannel, each subchannel and OFDMA symbol combination or district do not require and must be arranged in each frame.
Described step B comprises:
The up-downgoing transfer district that comprises in the uplink and downlink physical layer frame based on BS that is provided with and RS between BS, RS and user terminal, up-downgoing transfer broadcast sub-channels, descending sub frame head, descending sub frame head receive and/or the range finding subchannel carries out the mutual of message, realize wireless transfer communication.
The present invention also provides a kind of implementation method of wireless transfer communication, comprising:
By the downlink communication process of BS to user terminal:
C, BS send data in the descending transfer district of the descending sub frame of BS to RS, and RS receives described data by the descending transfer district in the sub-frame of uplink of the 2nd OFDMA-FDD transceiver of RS;
D, RS send the data set user terminal at the descending sub frame of the OFDMA-FDD transceiver of RS;
By the uplink communication process of user terminal to BS:
E, by in the sub-frame of uplink of the OFDMA-FDD transceiver of RS, sending upstream data by user terminal, and RS receives described data;
F, RS send up interim data in the up transfer of the 2nd OFDMA-FDD transceiver descending sub frame district of RS, and BS receives described interim data in the up transfer district of the sub-frame of uplink of BS.
Describedly also comprise to the downlink communication process of user terminal by BS:
The OFDMA-FDD transceiver of BS and RS sends lead code at first symbol of the descending sub frame head of separately descending sub frame respectively, and it is synchronous to receive the RS of lead code or user terminal and BS or RS.
Among the present invention, after sending described lead code, also comprise:
The OFDMA-FDD transceiver of described BS or RS is also wanted transmit frame control head FCH, descending mapping table DL-MAP and up mapping table UL-MAP information, receives the RS of each information or user terminal is determined each burst according to each information subchannel and/or character position and using method information.
Described step C also comprises:
BS sends broadcast in the descending transfer broadcast sub-channels in the descending transfer district of BS descending sub frame to RS, and RS receives described message by the descending transfer broadcast sub-channels in the 2nd OFDMA-FDD transceiver sub-frame of uplink of RS.
Described step C also comprises:
When can direct communication between BS and the user terminal, BS adopts predetermined chnnel coding and modulation system with the broadcasting of descending sub frame head, or adopts the transmitting power of predetermined transmission data, directly issues user terminal by BS.
Among the present invention, also comprise to the downlink communication process of user terminal by BS:
Lead code in the descending sub frame head of user terminal reception BS descending sub frame, and synchronous with BS;
User terminal receives FCH, DL-MAP and the UL-MAP information that BS sends, and obtains subchannel and/or the character position and the using method information of each burst of BS and RS.
Describedly also comprise by the uplink communication process of user terminal to BS:
User terminal receives FCH, DL-MAP and the UL-MAP information of descending sub frame head of descending sub frame of the OFDMA-FDD transceiver of RS, determines each burst subchannel and character position and using method information of RS; Perhaps, user terminal receives FCH, DL-MAP and the UL-MAP information of descending sub frame head of the descending sub frame of BS, determines each burst subchannel and character position and using method information of BS and RS;
The 2nd OFDMA-FDD transceiver of RS receives FCH, DL-MAP and the UL-MAP information of the descending sub frame head in the BS descending sub frame, obtains BS each burst subchannel and character position and using method information.
As seen from the above technical solution provided by the invention, the present invention is by introducing the mechanism that TDM combines with OFDMA, the physical layer frame structure of definition BS and RS, thus the wireless senior transfer pattern of OFDMA (or SOFDMA) can be supported, and promptly MS/SS can carry out wireless transfer access BS by RS; Simultaneously can also support the wireless simplification transfer of OFDMA (or SOFDMA) pattern, promptly the downlink data message of BS or the message packet except that DL-MAP, UL-MAP can pass through the RS transfer; Up other burst of BS except that initial access range finding Ranging, the Perodic ranging Ranging of MS/SS, bandwidth request message, can be passed through the RS transfer.
Realization of the present invention can also effectively guarantee between RS and BS, MS/SS the communicating by letter of TDM-OFDMA-FDD mode, and avoids the various interference that may occur in the transfer communication process.
Description of drawings
Fig. 1 is the adjacent situation schematic diagram of OFDMA symbol subcarrier;
Fig. 2 is based on OFDMA frame structure schematic diagram in the communication system of FDD;
Fig. 3 is the transfer communication pattern diagram one of BS and RS;
Fig. 4 is the transfer communication pattern diagram two of BS and RS;
Fig. 5 is the structural representation of system of the present invention;
The co-channel interference pattern diagram of Fig. 6 for existing in the communication system;
Fig. 7 is the physical layer frame structure schematic diagram one of BS provided by the invention and RS;
Fig. 8 is the physical layer frame structure schematic diagram two of BS provided by the invention and RS.
Embodiment
The senior transfer communication pattern of RS of the present invention and BS, MS/SS as shown in Figure 3, adopts the TDM-OFDMA-FDD mode to communicate by letter the descending employing frequency f 2 of BS and RS, the up employing frequency f 1 of BS and RS between RS and BS, MS/SS; MS/SS carries out wireless transfer by RS and inserts BS, and RS inserts BS as a MS/SS.
In Fig. 3, described RS need have two cover FDD transceivers, i.e. FDD transceiver 1 and FDD transceiver 2 among Fig. 3, and be specially: the first cover transmitter TX1 works in frequency f 1, and receiver RX1 works in frequency f 2; The second cover transmitter TX2 works in frequency f 2, and receiver RX2 works in frequency f 1.
In addition, in Fig. 3, DL
BSBe the descending sub frame of the physical layer frame of BS, by BS to SS/MS
BSOr RS, UL
BSFor the sub-frame of uplink of the physical layer frame of BS, by SS/MS
BSOr RS is to BS, SS/MS
BS, RS second cover transceiver and the BS keep receiving frame synchronous; DL
RSBe the descending sub frame of the physical layer frame of RS, by BS to SS/MS
RSOr RS, UL
RSFor the sub-frame of uplink of the physical layer frame of RS, by SS/MS
RSOr RS is to BS, SS/MS
RSKeep receiving frame synchronous with the first cover transceiver of RS.
The simplification transfer communication pattern of RS of the present invention and BS, MS/SS, as shown in Figure 4.Corresponding RS need have two cover FDD transceivers equally: the first cover transmitter TX1 works in frequency f 1, and receiver RX1 works in frequency f 2; The second cover transmitter TX2 works in frequency f 2, and receiver RX2 works in frequency f 1.And, in Fig. 4, DL
BSBe the downlink frame of the physical layer frame of BS, by BS to SS/MS
BSOr RS, UL
BSFor the uplink frame of the physical layer frame of BS, by SS/MS
BSOr RS is to BS; SS/MS
BSOr SS/MS
RS, RS second cover transceiver and the BS keep receiving frame synchronous.DL
RSBe the downlink frame of the physical layer frame of RS, by BS to SS/MS
RSOr RS, UL
RSFor the uplink frame of the physical layer frame of RS, by SS/MS
RSOr RS is to BS.Wherein, DL
BSDownlink broadcast burst (Broadcast Burst), as Preamble, FCH, DL-MAP, UL-MAP, directly issue MS/SS, by the RS transfer by BS; Initial access range finding Ranging, the Perodic ranging Ranging of MS/SS, bandwidth request are passed through UL
BSRange finding subchannel Ranging Subchannel, directly issue BS, by the RS transfer by MS/SS; For DL
BSDescending other burst, as data message or the message packet except that DL-MAP, UL-MAP, can not directly issue MS/SS by BS, must pass through the RS transfer; UL
BSUp other burst, as except that initial access range finding Ranging, the Perodic ranging Ranging of MS/SS, bandwidth request message, can not directly issue BS by MS/SS, must be by the RS transfer.
The invention provides a kind of BS of comprising, RS and SS/MS wireless transfer communication system, adopt two kinds of communication patterns respectively: senior transfer pattern and simplification transfer pattern, specifically as shown in Figure 5:
Wherein, BS comprises:
The wire transmission processing unit: can be with upper level equipment (as base station controller) or set up with one group of base station equipment respectively and communicate by letter, and and upper level equipment or each base station equipment between carry out information alternately;
OFDMA-FDD transceiver: be used for carrying out radio communication in the OFDMA-FDD mode, form by OFDMA-FDD transmitting set physical layer processing unit, OFDMA-FDD wireless receiver physical layer processing unit and OFDMA transceiver data link layer deals unit with RS or SS/MS.
OFDMA-FDD transmitting set physical layer processing unit (frequency is f1): respectively with the OFDMA transceiver data link layer and the RS that can communicate with in OFDMA-FDD wireless receiver 2 physical layer processing unit or the OFDMA-FDD wireless receiver physical layer processing unit among the SS/MS carry out radio communication; For simplifying the transfer pattern, this unit is to DL
BSDescending sub frame head broadcasting (as Preamble, FCH, DL-MAP, UL-MAP) adopt than higher chnnel coding and the modulation system (as binary phase shift keying BPSK) of other transmission data reliability, or adopt than the higher transmitting power of other transmission data, directly issue MS/SS, not by the RS transfer by BS;
OFDMA-FDD wireless receiver physical layer processing unit (frequency is f2): respectively with the OFDMA transceiver data link layer and the RS that can communicate with in OFDMA-FDD transmitting set 2 physical layer processing unit or the OFDMA-FDD transmitting set physical layer processing unit among the SS/MS carry out radio communication;
OFDMA transceiver data link layer deals unit: to data from OFDMA-FDD wireless receiver physical layer processing unit or wire transmission processing unit, after making the data processing of OFDMA transceiver data link layer, be transmitted to wire transmission processing unit or OFDMA-FDD transmitting set physical layer processing unit.
RS among the figure comprises:
OFDMA-FDD transceiver 1 and 2: be used for carrying out radio communication in the OFDMA-FDD mode, form by the physical layer processing unit and the OFDMA transceiver data link layer deals unit of the physical layer processing unit of OFDMA-FDD transmitting set 1 and 2, OFDMA- FDD wireless receiver 1 and 2 with BS or SS/MS.
OFDMA-FDD transmitting set 2 physical layer processing unit (frequency is f2), i.e. the 2nd OFDMA-FDD transmitting set physical layer processing unit: respectively with the OFDMA transceiver data link layer and the BS that can communicate with in OFDMA-FDD wireless receiver physical layer processing unit carry out radio communication;
OFDMA-FDD transmitting set 1 physical layer processing unit (frequency is f1), i.e. an OFDMA-FDD transmitting set physical layer processing unit: respectively with the OFDMA transceiver data link layer and the SS/MS that can communicate with in OFDMA-FDD wireless receiver physical layer processing unit carry out radio communication;
OFDMA-FDD wireless receiver 2 physical layer processing unit (frequency is f1), i.e. the 2nd OFDMA-FDD wireless receiver physical layer processing unit: respectively with the OFDMA transceiver data link layer and the BS that can communicate with in OFDMA-FDD transmitting set physical layer processing unit carry out radio communication;
OFDMA-FDD wireless receiver 1 physical layer processing unit (frequency is f2), i.e. an OFDMA-FDD wireless receiver physical layer processing unit: respectively with the OFDMA transceiver data link layer and the SS/MS that can communicate with in OFDMA-FDD transmitting set physical layer processing unit carry out radio communication;
OFDMA transceiver data link layer deals unit: to data from OFDMA-FDD wireless receiver 1 and/or 2 physical layer processing unit, after making the data processing of OFDMA transceiver data link layer, be transmitted to OFDMA-FDD transmitting set 1 and/or 2 physical layer processing unit.
Wherein, described OFDMA-FDD transmitting set 1 and OFDMA-FDD wireless receiver 1 are an OFDMA-FDD transceiver, and described OFDMA-FDD transmitting set 2 and OFDMA-FDD wireless receiver 2 are the 2nd OFDMA-FDD transceiver.
SS/MS among the figure comprises:
OFDMA-FDD transceiver: be used for carrying out radio communication in the OFDMA-FDD mode, form by OFDMA-FDD transmitting set physical layer processing unit, OFDMA-FDD wireless receiver physical layer processing unit and OFDMA transceiver data link layer deals unit with RS or BS.
OFDMA-FDD transmitting set physical layer processing unit: respectively with the OFDMA transceiver data link layer and the RS that can communicate with in OFDMA-FDD wireless receiver 1 physical layer processing unit or BS OFDMA-FDD wireless receiver physical layer processing unit carry out radio communication; For simplifying the transfer pattern, this unit is to UL
BSUplink random insert (Random Access) time slot (or being called competition slot Contention slot), as initial Ranging competition slot and bandwidth request competition slot, or initial access range finding Ranging, Perodic ranging Ranging, the bandwidth request of MS/SS are passed through UL
BSRange finding subchannel Ranging Subchannel, adopt than other and send higher chnnel coding and the modulation system (as binary phase shift keying BPSK) of data reliability, or adopt than the higher transmitting power of other transmission data, directly issue BS, by the RS transfer by MS/SS;
OFDMA-FDD wireless receiver physical layer processing unit: respectively with the OFDMA transceiver data link layer and the RS that can communicate with in OFDMA-FDD transmitting set physical layer processing unit among OFDMA-FDD transmitting set 1 physical layer processing unit or the BS carry out radio communication;
OFDMA transceiver data link layer deals unit: to from OFDMA-FDD wireless receiver physical layer processing unit or user's data, after making the data processing of OFDMA transceiver data link layer, be transmitted to user or OFDMA-FDD transmitting set physical layer processing unit.
Under the FDD communication pattern, may there be the phase mutual interference of 4 kinds of situations shown in Fig. 6 (a)-(d) in network system communication.Wherein, TX represents sending module, and RX represents receiver module.
The present invention then needs to be provided with the physical layer frame structure of rational BS and RS for realizing the transfer communication based on RS, thereby guarantees that the transfer communication process can realize reliably, simultaneously, can also effectively avoid the various interference that may exist among Fig. 4.
To the specific implementation of the physical layer frame structure of BS provided by the invention and RS be described in detail below.
For realizing transfer communication function, then need in the physical layer frame structure of BS and RS, carry out following setting based on RS:
1, the frequency at the physical layer frame structure of BS is the descending sub frame DL of f1
BSMiddle TDM (time division multiplexing) technology that adopts increases DL Relay Zone (descending transfer district), is used to define descending rotor channel of BS and the OFDMA symbol combination of being passed to RS by BS;
Among the present invention, for the situation of many RS, then many RS share DL Relay Zone by different subchannels and OFDMA symbol combination;
2, in the frequency of RS is the physical layer frame structure of the second cover wireless receiver RX2 of f1, adopt the TDM technology, open up DL Relay Zone (descending transfer district), be used to define rotor channel and the OFDMA symbol combination that RS receives the DL Relay Zone of BS;
Situation for many RS, then many RS share DL Relay Zone by different subchannels and OFDMA symbol combination, different RS RX2 only receives the interim data of BS in corresponding subchannel and the OFDMA symbol combination in DL Relay Zone, then do not arrange to receive at other subchannel and OFDMA symbol combination;
3, the frequency at the physical layer frame structure of BS is the sub-frame of uplink UL of f2
BSThe middle TDM technology that adopts increases UL Relay Zone (up transfer district), is used to define up rotor channel of BS and the OFDMA symbol combination of being passed to BS by RS;
For the situation of many RS, many RS share ULRelay Zone by different subchannels and OFDMA symbol combination;
4, in the frequency of RS is the physical layer frame structure of the second cover transmitting set TX2 of f2, adopt the TDM technology, open up UL Relay Zone (up transfer district), be used to define rotor channel and the OFDMA symbol combination that RS receives the UL Relay Zone of BS;
Situation for many RS, many RS share ULRelay Zone by different subchannels and OFDMA symbol combination, different RS TX2 only sends the interim data of BS in corresponding subchannel and the OFDMA symbol combination in UL Relay Zone, other subchannel and OFDMA symbol combination can not arrange to send.
During BS UL Relay Zone correspondence, SS/MS
BS, SS/MS
RSDo not arrange any transmission subchannel and OFDMA symbol combination, RS does not arrange any reception subchannel and OFDMA symbol combination, to avoid " SS/MS
BSTo BS ", " SS/MS
RSTo BS " interference; During BS DL Relay Zone correspondence, RS does not arrange any transmission subchannel and OFDMA symbol combination, avoids self disturbing of " RS being to RS ".
Be the transmission of the broadcast message between BS and the RS in the assurance transfer communication process, also need in the physical layer frame structure of BS and RS, carry out following setting:
1, the frequency at the physical layer frame structure of BS is the descending sub frame DL of f1
BSDL Relay Zone in open up DL Relay Broadcast Subchannel (descending transfer broadcast sub-channels), be used to define downlink sub-channels and the OFDMA symbol combination that is broadcast to RS by BS, the information of broadcasting comprises DCD (down channel descriptor), UCD (upstream channel descriptor), FPC (fast power control), CLK_CMP (clock relatively) broadcasting packet of 802.16 standard definitions;
2, in being the DL Relay Zone of physical layer frame structure of the second cover wireless receiver RX2 of f1, the frequency of RS opens up DL Relay Broadcast Subchannel (descending transfer broadcast sub-channels), be used to define up subchannel of RS and the OFDMA symbol combination that receives the descending transfer time slot of BS, receive DCD, UCD, FPC, the CLK_CMP broadcasting packet of broadcasting 802.16 standard definitions.
Among the present invention, also in the physical layer frame structure of BS and RS, carry out following setting:
1, the frequency at the physical layer frame structure of BS is the sub-frame of uplink UL of f2
BSUL Relay Zone in definition Relay Ranging Subchannel (transfer range finding subchannel, be abbreviated as RRS), definition is used for initial access range finding Ranging, the Perodic ranging Ranging of RS, the BS transfer range finding of bandwidth request receives subchannel and OFDMA symbol combination; This transfer range finding subchannel RRS also can be used as initial access range finding Ranging, Perodic ranging Ranging, the bandwidth request range finding subchannel of SS/MSSBS and uses;
2, in being the DL Relay Zone of physical layer frame structure of the second cover transmitting set TX2 of f2, the frequency of RS opens up Relay Ranging TX Subchannel (transfer range finding subchannel, be abbreviated as RRS TX), be used to define initial access range finding Ranging, the Perodic ranging Ranging of RS, the RS transfer range finding transmission subchannel and the OFDMA symbol combination of bandwidth request.
The time-frequency relation of the Relay Ranging TX Subchannel of the Relay Ranging Subchannel of above-mentioned BS and RS TX2 must be corresponding one by one, strict synchronism.
And, in the descending sub frame of the physical layer frame structure of BS or RS TX1, except that the DL Relay Zone of DL Header, BS and RX TX1 are during the correspondence of the DL Relay of the DL of BS Header, BS Zone, BS and different RS share the remainder of descending sub frame by different subchannels and OFDMA symbol combination, and " RS is to SS/MS to avoid
BS" and " BS is to SS/MS
RS" interference.
In the sub-frame of uplink of the physical layer frame structure of BS or RS RX1, except that the UL Relay Zone of BS and RS RX1 are during the correspondence of the UL of BS Relay Zone, BS and different RS share the remainder of sub-frame of uplink by different subchannels and OFDMA symbol combination, to avoid " SS/MS
BSTo RS " and " SS/MS
RSTo BS " interference.
Among the present invention, also in the physical layer frame structure of BS and RS, carry out following setting:
1, the frequency at the physical layer frame structure of BS is the descending sub frame DL of f1
BSMiddle definition DL Header (descending sub frame head), beginning for descending sub frame, be used to define subchannel and OFDMA symbol combination that sends user's synchronizing information and subchannel and the OFDMA symbol combination that sends indication information, with indication BS physical layer frame structure descending sub frame and each subchannel of sub-frame of uplink and the position and the using method profile of OFDMA symbol combination;
Described synchronizing information and indication information specifically comprise: preamble, FCH, DL-MAP and UL-MAP information in former 802.16OFDMA (or SOFDMA) frame make SS/MS
BS, RS and BS keep receiving frame synchronous;
2, under senior transfer pattern, in the frequency of RS the descending sub frame DL of physical layer frame structure of the first cover transmitting set TX1 of f1
RSMiddle definition DL Header (descending sub frame head), and be arranged on the zero hour of descending sub frame, be used to define subchannel and OFDMA symbol combination that sends user's synchronizing information and subchannel and the OFDMA symbol combination that sends indication information, with first cover transmitting set physical layer frame structure descending sub frame and each subchannel of sub-frame of uplink and the position and the using method profile of OFDMA symbol combination of indication RS;
Described synchronizing information and indication information comprise preamble, FCH, DL-MAP and the UL-MAP information in former 802.16OFDMA (or SOFDMA) frame equally, thereby make SS/MS
RSKeep receiving frame synchronous with RS.
Among the present invention, under senior transfer pattern, the DL Header of RS TX1 lags behind the DL Header of BS in time; During the DL of RS TX1 Header, the descending sub frame DL of BS
BSCan not arrange any transmission subchannel and OFDMA symbol combination, " BS is to SS/MS to avoid
RS" interference;
Under senior transfer pattern, during the DL of RS TX1 Header, the descending sub frame DL of the physical layer frame structure of other RS TX1
RSCan not arrange any transmission subchannel and OFDMA symbol combination, " RS is to SS/MS to avoid
RS" interference.
Under special circumstances, if the DL Header of different RS TX1 is overlapping in time, then must be overlapping fully, strict synchronism, and its content must be identical avoids that " RS is to SS/MS
RS" interference.
Among the present invention, also in the physical layer frame structure of BS and RS, carry out following setting:
1, in the frequency of RS is the physical layer frame structure of the second cover wireless receiver RX2 of f1, opens up DLHeader RX (receptions of descending sub frame head), be used to define subchannel and the OFDMA symbol combination of the DL Header of reception BS; The two cover FDD transceivers of RS are obtained frequency and/or sign synchronization according to preamble and the BS that DL Header RX Slot receives.
The time-frequency relation of the DL Header RX of the DL Header of BS and RS RX2 must corresponding one by one, strict synchronism.
Among the present invention, also in the physical layer frame structure of BS and RS, carry out following setting:
1, the frequency at the physical layer frame structure of BS is the sub-frame of uplink UL of f2
BSMiddle definition Ranging Subchannel (range finding subchannel), definition is used for SS/MSS
BSInitial access range finding Ranging, Perodic ranging Ranging, the BS range finding of bandwidth request receive subchannel and OFDMA symbol combination;
2, under senior transfer pattern, in the frequency of RS the sub-frame of uplink UL of physical layer frame structure of the first cover wireless receiver RX1 of f2
RSMiddle definition Ranging Subchannel (range finding subchannel), definition is used for SS/MSS
RSInitial access range finding Ranging, Perodic ranging Ranging, the RS range finding of bandwidth request receive subchannel and OFDMA symbol combination.
Among the present invention, except that DL Header, Ranging Subchanhel, the not necessarily every frame of the subchannel of above-mentioned definition and OFDMA symbol combination or Zone all must exist.
According to the above-mentioned physical layer frame structure that provides, the present invention also provides the embodiment of the physical layer frame structure of a kind of BS and RS, as shown in Figure 7 and Figure 8, wherein, Fig. 7 is BS under the senior transfer pattern and the physical layer frame structure schematic diagram of RS, and Fig. 8 is for simplifying BS under the transfer pattern and the physical layer frame structure schematic diagram of RS.
Among the figure, the transmission of RS, BS and receive frequency are as the criterion with the frequency marking of frame high order end in scheming, " NULL " among the figure or the blank parts part for not arranging any reception or transmission.
To be described concrete frame structure among Fig. 7 and Fig. 8 below:
Among the figure, BS descending sub frame DL
BSWith RS TX1 descending sub frame DL
RSIn Preamble, UL-MAP, DL-MAP and FCH zone be DL Header; RS RX2 sub-frame of uplink UL
RSIn vertical white band shape zone be DL Header RX.
The DL Relay Zone of BS is arranged in BS descending sub frame DL
BSDL Header after, described DL Relay Zone is the DL Relay broadcast among the figure, DL Relay R# 1, #2... part; The UL Relay Zone of BS is arranged in BS descending sub frame DL
BSThe beginning part, described is ULRelay R# 1, #2... and RRS TX part.During BS UL Relay Zone correspondence, SS/MS
BS, SS/MS
RSDo not arrange any transmission subchannel and OFDMA symbol combination, RS does not arrange any reception subchannel and OFDMA symbol combination; During BS DL Relay Zone correspondence, RS does not arrange any transmission subchannel and OFDMA symbol combination.
PHY burst (burst) has been assigned with one group of adjacent subchannel and one group of OFDMA symbol (symbol), BS and the different RS remainder by different subchannels and the shared descending sub frame of OFDMA symbol combination.
The present invention also provides the handling process of OFDMA transfer communication of physical layer frame structure of the RS of concrete BS based on above-mentioned setting, corresponding handling process comprises the descending transfer communication handling process to user terminal by BS, and by the up transfer communication handling process of user terminal to BS.
At first descending transfer Downlink relay communication process flow process is described below, the processing stage that this downflow comprising two, the phase I is the communication process by BS to RS, and second stage then is by the processing procedure of RS to user terminal, is specially:
(1) phase I (BS-＞RS):
In this stage, senior transfer pattern with simplify the transfer pattern under all adopt identical processing;
1, BS is the descending sub frame DL of f1 in frequency
BSDL Header in first symbol symbol send lead code preamble;
2, RS# 1 is the DL Header RX reception BS descending sub frame DL of f1 by RS RX2 frequency
BSDL Header in lead code preamble and BS obtain synchronously;
3, BS is the descending sub frame DL of f1 in frequency
BSThe preamble of DL Header after in send FCH, DL-MAP, and UL-MAP information;
4, RS# 1 is the DL Header RX reception descending sub frame DL of f1 by RS RX2 frequency
BSThe FCH of DLHaader, DL-MAP, and UL-MAP information obtain subchannel and OFDMA character position and using method (profile) information of descending and up each burst of BS;
5, BS utilizes the descending sub frame DL of frequency for f1
BSThe DL Relay broadcast of DL Relay Zone send broadcast message;
6, BS is the descending sub frame DL of f1 in frequency
BSThe DL Relay RS# 1 of DL Relay Zone in send descending transfer communication data traffic data to RS# 1;
7, RS# 1 is the DL RB reception BS descending sub frame DL of f1 by RS RX2 frequency
BSThe DL Relay broadcast of DL Relay Zone in broadcast message, wherein can comprise the message that needs RS# 1 transfer broadcasting;
8, RS# 1 is the DL Relay Zone reception BS descending sub frame DL of f1 by RS RX2 frequency
BSThe DL Relay RS# 1 of DL Relay Zone in descending transfer communication data traffic data.
(2) second stage (RS-＞MS/SS):
For senior transfer pattern, the processing in this stage comprises:
1, RS# 1 TX1 is at descending sub frame DL
RSFrequency is that first symbol symbol among the DL Header of f1 sends lead code preamble;
2, MS/SS receives RS# 1 TX1 descending sub frame DL
RSDL Header in lead code preamble and RS# 1 obtain synchronously;
3, RS# 1 TX1 is at descending sub frame DL
RSFrequency is that the preamble of the DL Header of f1 sends FCH, DL-MAP, UL-MAP afterwards; Wherein, the FCH of RS# 1, DL-MAP, UL-MAP can send to RS# 1 by BS in the step 6 of phase I;
4, MS/SS receives RS# 1 TX1 descending sub frame DL
RSThe FCH of DL Header, DL-MAP, and UL-MAP information obtain subchannel and OFDMA character position and using method (profile) information of descending and up each burst of the RS# 1 first cover transmitting set;
5, RS# 1 TX1 is at descending sub frame DL
RSIn, in the time-frequency interval except that DL Header, DL Relay Zone, sending descending transfer communication data traffic data to MS/SS with frequency f 1, described transfer communication data send to RS# 1 by BS in step 6;
6, MS/SS is from the interval RS# 1 TX1 descending sub frame DL that receives of corresponding time-frequency
RSIn descending transfer communication data traffic data.
For simplifying the transfer pattern, the processing procedure in this stage specifically comprises:
1, MS/SS receives BS descending sub frame DL
BSDL Header in lead code preamble, thereby obtain synchronously with BS;
2, MS/SS receives BS descending sub frame DL
BSThe FCH of DL Header, DL-MAP, and UL-MAP information obtain BS and RS# 1 is descending and the subchannel of up each burst and OFDMA character position and using method (profile) information;
3, RS# 1 TX1 is at descending sub frame DL
RSIn, in the time-frequency interval except that DL Header, DL Relay Zone, sending descending transfer communication data traffic data to MS/SS with frequency f 1, described transfer communication data send to RS# 1 by BS in the step 6 of phase I;
4, MS/SS is from the interval RS# 1 TX1 descending sub frame DL that receives of corresponding time-frequency
RSIn descending transfer communication data traffic data.
Up transfer Uplink relay communication process flow process is described below, the processing stage that this upflow comprising two equally, the phase I is by the communication process of user terminal to RS again, and second stage then is by the processing procedure of RS to BS, is specially:
(1) phase I (MS/SS-＞RS):
In this stage, for senior transfer pattern, then corresponding processing procedure comprises:
1, MS/SS MS/SS receives RS# 1 TX1 descending sub frame DL
RSFrequency is the FCH of the DL Header of f1, DL-MAP, and UL-MAP obtains subchannel and OFDMA character position and using method (profile) information of descending and up each burst of the RS# 1 first cover transmitting set;
2, MS/SS is at RS RX1 sub-frame of uplink UL
RSIn, the time-frequency interval during BS UL Relay Zone correspondence sends uplink communication data traffic data to RS# 1 with frequency f 2;
3, RS# 1 RX1 receives MS/SS sub-frame of uplink (UL with frequency f 2 from corresponding time-frequency interval
RS) in uplink communication data traffic data.
In this stage, for simplifying the transfer pattern, then corresponding processing procedure comprises:
1, MS/SS MS/SS receives BS descending sub frame DL
BSFrequency is the FCH of the DL Header of f1, DL-MAP, and UL-MAP obtains subchannel and OFDMA character position and using method (profile) information of descending and up each burst of BS and the RS# 1 first cover transmitting set;
2, MS/SS is at RS RX1 sub-frame of uplink UL
RSIn, the time-frequency interval during BS UL Relay Zone correspondence sends uplink communication data traffic data to RS# 1 with frequency f 2;
3, RS# 1 RX1 receives MS/SS sub-frame of uplink UL with frequency f 2 from corresponding time-frequency interval
RSIn uplink communication data traffic data.
(2) second stage (RS-＞BS):
In this stage, senior transfer pattern adopts identical processing mode with simplification transfer pattern;
1, RS# 1 RX2 receives BS descending sub frame DL
BSMedium frequency is the FCH of the DL Header of f1, DL-MAP, and UL-MAP obtains subchannel and OFDMA character position and using method (profile) information of descending and up each burst of BS;
2, RS# 1 TX2 with frequency f 2 at RS descending sub frame DL
RSThe UL RelayRS# 1 of UL Relay Zone in send up transfer communication data traffic data to BS, described transfer communication data send to RS# 1 by BS in the step 2 of phase I;
3, BS is the sub-frame of uplink UL of f2 in frequency
BSThe UL Relay RS# 1 of UL Relay Zone in receive up transfer communication data traffic data among the S5.
In sum, the present invention defines the physical layer frame structure of BS and RS by introducing the mechanism that TDM combines with OFDMA, and to support the wireless senior transfer pattern of OFDMA (or SOFDMA), promptly MS/SS can carry out wireless transfer access BS by RS; Simultaneously, can also support the wireless simplification transfer of OFDMA (or SOFDMA) pattern, promptly the downlink data message of BS or the message packet except that DL-MAP, UL-MAP can pass through the RS transfer; Up other burst of BS except that initial access range finding Ranging, the Perodic ranging Ranging of MS/SS, bandwidth request message, can be passed through the RS transfer;
Realization of the present invention can effectively guarantee between RS and BS, MS/SS simultaneously, can also to avoid the following various interference that may exist the communicating by letter of FDD/TDM/OFDMA mode:
2, avoid " SS/MS
BSTo BS ", " SS/MS
BSTo RS " and " SS/MS
RSTo BS " interference;
3, avoid self disturbing of " RS being to RS ".
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (26)
1, a kind of wireless transfer communication system based on OFDMA-FDD, it is characterized in that, comprise base station BS, terminal RS and user terminal, described RS provides the interface with BS and user terminal communication respectively, and in described RS, comprise an OFDMA-FDD transceiver and the 2nd OFDMA-FDD transceiver, wherein, the OFDMA-FDD wireless receiver physical layer element in the OFDMA-FDD transmitting set physical layer element that comprises of the OFDMA-FDD transceiver among the RS and an OFDMA-FDD wireless receiver physical location and the user terminal and OFDMA-FDD transmitting set physical layer element is corresponding and keep receiving frame synchronous; OFDMA-FDD wireless receiver physical layer element among the 2nd OFDMA-FDD transmitting set physical layer element that the 2nd OFDMA-FDD transceiver among the RS comprises and the 2nd OFDMA-FDD wireless receiver physical location and the BS and OFDMA-FDD transmitting set physical layer element is corresponding and keep receiving frame synchronous.
2, the wireless transfer communication system based on OFDMA-FDD according to claim 1 is characterized in that, also is provided with the wire transmission processing unit that is connected with upper level equipment among the described BS.
3, the wireless transfer communication system based on OFDMA-FDD according to claim 1 is characterized in that, also is respectively arranged with corresponding OFDMA-FDD transceiver data-link layer unit in described BS, RS and the user terminal.
4, according to claim 1,2 or 3 described wireless transfer communication system based on OFDMA-FDD, it is characterized in that, described BS also provides the interface with user terminal communication, described BS is by adopting predetermined chnnel coding and modulation system, perhaps, adopt predetermined transmission power level that lead code Preamble, frame control head FCH, descending mapping table DL-MAP and up mapping table UL-MAP information are directly sent to user terminal from this interface.
5, a kind of method in the realization wireless transfer communication is characterized in that, comprising:
A, in the descending sub frame of the base station BS physical layer frame structure of OFDMA system and sub-frame of uplink, adopt the time division multiplexing tdm mode that descending transfer district and up transfer district are set respectively, in the sub-frame of uplink of terminal RS the 2nd OFDMA-FDD transceiver physical layer frame structure and descending sub frame, descending transfer district and up transfer district are set respectively, are used to define rotor channel and OFDMA symbol combination between BS and the RS;
B, the uplink and downlink physical layer frame based on the BS of described setting and RS between BS, RS and user terminal adopt FDD to carry out wireless transfer communication.
6, method according to claim 5 is characterized in that, described steps A also comprises:
During the up transfer district of BS correspondence, user terminal is not provided with and sends subchannel and OFDMA symbol combination, and RS is not provided with any reception subchannel and OFDMA symbol combination; During the descending transfer district of BS correspondence, RS is not provided with any transmission subchannel and OFDMA symbol combination.
7, method according to claim 5, it is characterized in that, when having a plurality of RS, share downlink or uplink transfer district by different subchannels and OFDMA symbol combination between the 2nd OFDMA-FDD transceiver of a plurality of RS, different RS the 2nd OFDMA-FDD transceivers only receives or sends data in corresponding subchannel and the OFDMA symbol combination in downlink or uplink transfer district.
8, method according to claim 5 is characterized in that, described steps A comprises:
In the descending transfer district of the descending sub frame of the physical frame structure of BS, descending transfer broadcast sub-channels is set, is used to define down channel and the OFDMA symbol combination that is broadcast to RS by BS, broadcast corresponding broadcasting packet;
In the descending transfer district of the sub-frame of uplink of the physical frame structure of the 2nd OFDMA-FDD transceiver of RS, descending transfer broadcast sub-channels is set, be used to define up subchannel of RS and the OFDMA symbol combination that receives the descending transfer broadcast channel of BS, receive corresponding broadcasting packet.
9, method according to claim 5 is characterized in that, described steps A also comprises:
Transfer range finding subchannel is set in the descending sub frame of the physical layer frame structure of BS, is used to define initial access range finding, the Perodic ranging of RS, the BS transfer range finding of bandwidth request receives subchannel and OFDMA symbol combination;
The transfer range finding is set in the descending sub frame of the physical layer frame structure of RS the 2nd OFDMA-FDD transceiver sends subchannel, be used to define initial access range finding, the Perodic ranging of RS, the RS transfer range finding of bandwidth request sends subchannel and OFDMA symbol combination.
10, method according to claim 9 is characterized in that, the transfer range finding subchannel of described BS and the transfer range finding of RS send the corresponding setting of subchannel, and keep strict synchronism.
11, method according to claim 5 is characterized in that, described steps A also comprises:
At BS, or in the physical layer frame structure downlink frame of BS and RS the one OFDMA-FDD transceiver descending frame head is set, specifically be arranged at the zero hour of descending sub frame, be used to define subchannel that sends user's synchronizing information and subchannel and the OFDMA symbol combination that sends indication information, be used to indicate BS, or the position of each subchannel of BS and RS physical layer frame structure downlink frame and uplink frame and using method profile, wherein, the descending frame head of the OFDMA-FDD transceiver of RS lags behind the descending frame head of BS in time, and during the descending frame head of the OFDMA-FDD transceiver of RS, BS can not be provided with descending sub frame and send subchannel and OFDMA symbol combination.
12, according to claim 11ly realize wireless method for transfer, it is characterized in that described descending sub frame comprises based on terminal:
Lead code preamble in OFDM or the single carrier frame, frame control head FCH burst, descending mapping table DL-MAP and/or up mapping table UL-MAP.
13, according to claim 11ly realize wireless method for transfer, it is characterized in that described steps A also comprises based on terminal:
The descending sub frame head of the OFDMA-FDD transmitting set of RS lags behind the descending frame head of BS in time, and during the descending frame head of RS, the descending sub frame of BS can not be arranged any transmission subchannel and OFDMA symbol combination;
And/or when having a plurality of RS, during the descending frame head of the OFDMA-FDD transceiver of RS, other RS the one FDD transceiver can not be provided with descending sub frame and send subchannel and OFDMA symbol combination;
Or,
When having a plurality of RS, the descending sub frame head of the OFDMA-FDD transceiver of different RS is overlapping fully in time, strict synchronism, and descending sub frame head content must be identical.
14, method according to claim 11 is characterized in that, described steps A also comprises:
In the downlink frame of the physical layer frame structure of the 2nd OFDMA-FDD transceiver of RS the descending sub frame head being set receives, be used to define subchannel and the OFDMA symbol combination that RS receives the BS descending frame head, and this descending frame head receives and the descending frame head of BS needs overlapping and strict synchronism fully.
15, method according to claim 5 is characterized in that, described steps A also comprises:
In the sub-frame of uplink of the physical layer frame structure of the OFDMA-FDD transceiver of BS and RS the range finding subchannel is set, the RS range finding that is received range finding, Perodic ranging, bandwidth request that is used to define user terminal receives subchannel and OFDMA symbol combination.
16, according to each described method of claim 5 to 15, it is characterized in that described steps A also comprises:
Except that the OFDMA-FDD transmitting set of the descending transfer district of descending sub frame head, BS and RS was during the correspondence in the descending transfer district of the descending sub frame head of BS, BS, BS and different RS shared the remaining part of descending sub frame by different subchannels and OFDMA symbol combination in the descending sub frame of the physical layer frame structure of the OFDMA-FDD transceiver of BS or RS.
17, according to each described method of claim 5 to 15, it is characterized in that described steps A comprises:
In the sub-frame of uplink of the physical layer frame structure of the OFDMA-FDD wireless receiver of BS or RS, except that the OFDMA-FDD wireless receiver of the up transfer district of BS and RS was during the up transfer district of BS correspondence, BS met the remainder that sub-frame of uplink is shared in combination with different RS by different subchannels and OFDMA.
18, according to each described method of claim 5 to 15, it is characterized in that described steps A comprises:
Except that descending frame head, range finding subchannel, each subchannel and OFDMA symbol combination or district do not require and must be arranged in each frame.
19, according to each described method of claim 5 to 15, it is characterized in that described step B comprises:
The up-downgoing transfer district that comprises in the uplink and downlink physical layer frame based on BS that is provided with and RS between BS, RS and user terminal, up-downgoing transfer broadcast sub-channels, descending sub frame head, descending sub frame head receive and/or the range finding subchannel carries out the mutual of message, realize wireless transfer communication.
20, a kind of implementation method of wireless transfer communication is characterized in that, comprising:
By the downlink communication process of BS to user terminal:
C, BS send data in the descending transfer district of the descending sub frame of BS to RS, and RS receives described data by the descending transfer district in the sub-frame of uplink of the 2nd OFDMA-FDD transceiver of RS;
D, RS send the data set user terminal at the descending sub frame of the OFDMA-FDD transceiver of RS;
By the uplink communication process of user terminal to BS:
E, by in the sub-frame of uplink of the OFDMA-FDD transceiver of RS, sending upstream data by user terminal, and RS receives described data;
F, RS send up interim data in the up transfer of the 2nd OFDMA-FDD transceiver descending sub frame district of RS, and BS receives described interim data in the up transfer district of the sub-frame of uplink of BS.
21, method according to claim 20 is characterized in that, is describedly also comprised to the downlink communication process of user terminal by BS:
The OFDMA-FDD transceiver of BS and RS sends lead code at first symbol of the descending sub frame head of separately descending sub frame respectively, and it is synchronous to receive the RS of lead code or user terminal and BS or RS.
22, method according to claim 21 is characterized in that, after sending described lead code, also comprises:
The OFDMA-FDD transceiver of described BS or RS is also wanted transmit frame control head FCH, descending mapping table DL-MAP and up mapping table UL-MAP information, receives the RS of each information or user terminal is determined each burst according to each information subchannel and/or character position and using method information.
23, according to claim 20,21 or 22 described methods, it is characterized in that described step C also comprises:
BS sends broadcast in the descending transfer broadcast sub-channels in the descending transfer district of BS descending sub frame to RS, and RS receives described message by the descending transfer broadcast sub-channels in the 2nd OFDMA-FDD transceiver sub-frame of uplink of RS.
24, according to claim 20,21 or 22 described methods, it is characterized in that described step C also comprises:
When can direct communication between BS and the user terminal, BS adopts predetermined chnnel coding and modulation system with the broadcasting of descending sub frame head, or adopts the transmitting power of predetermined transmission data, directly issues user terminal by BS.
25, method according to claim 20 is characterized in that, is also comprised to the downlink communication process of user terminal by BS:
Lead code in the descending sub frame head of user terminal reception BS descending sub frame, and synchronous with BS;
User terminal receives FCH, DL-MAP and the UL-MAP information that BS sends, and obtains subchannel and/or the character position and the using method information of each burst of BS and RS.
26, method according to claim 20 is characterized in that, is describedly also comprised by the uplink communication process of user terminal to BS:
User terminal receives FCH, DL-MAP and the UL-MAP information of descending sub frame head of descending sub frame of the OFDMA-FDD transceiver of RS, determines each burst subchannel and character position and using method information of RS; Perhaps, user terminal receives FCH, DL-MAP and the UL-MAP information of descending sub frame head of the descending sub frame of BS, determines each burst subchannel and character position and using method information of BS and RS;
The 2nd OFDMA-FDD transceiver of RS receives FCH, DL-MAP and the UL-MAP information of the descending sub frame head in the BS descending sub frame, obtains BS each burst subchannel and character position and using method information.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510117477 CN1960352A (en) | 2005-10-31 | 2005-10-31 | Wireless transfer communication system and method based on OFDMA FDD |
| PCT/CN2006/002575 WO2007036161A1 (en) | 2005-09-30 | 2006-09-29 | Wireless relay communication system and method |
| CN2006800122322A CN101160997B (en) | 2005-09-30 | 2006-09-29 | Radio transfer communication system and its method |
| EP06791161.0A EP1931155B1 (en) | 2005-09-30 | 2006-09-29 | Wireless relay communication system and method |
| KR1020087010164A KR101002878B1 (en) | 2005-09-30 | 2006-09-29 | Wireless relay communication system and method |
| US12/058,451 US8218469B2 (en) | 2005-09-30 | 2008-03-28 | Wireless relay communication system and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510117477 CN1960352A (en) | 2005-10-31 | 2005-10-31 | Wireless transfer communication system and method based on OFDMA FDD |
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| CN1960352A true CN1960352A (en) | 2007-05-09 |
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| CN 200510117477 Pending CN1960352A (en) | 2005-09-30 | 2005-10-31 | Wireless transfer communication system and method based on OFDMA FDD |
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