CN1964221A - An access system and method for orthogonal frequency division multiplexing of wireless transfer communication - Google Patents

An access system and method for orthogonal frequency division multiplexing of wireless transfer communication Download PDF

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Publication number
CN1964221A
CN1964221A CN 200510115917 CN200510115917A CN1964221A CN 1964221 A CN1964221 A CN 1964221A CN 200510115917 CN200510115917 CN 200510115917 CN 200510115917 A CN200510115917 A CN 200510115917A CN 1964221 A CN1964221 A CN 1964221A
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China
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fdd
descending
transfer
physical layer
frame
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CN 200510115917
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郑若滨
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN 200510115917 priority Critical patent/CN1964221A/en
Priority to CN2006800122322A priority patent/CN101160997B/en
Priority to PCT/CN2006/002575 priority patent/WO2007036161A1/en
Priority to EP06791161.0A priority patent/EP1931155B1/en
Priority to KR1020087010164A priority patent/KR101002878B1/en
Publication of CN1964221A publication Critical patent/CN1964221A/en
Priority to US12/058,451 priority patent/US8218469B2/en
Pending legal-status Critical Current

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Abstract

The related wireless transfer OFDM access method comprises: in down and up subframe of BS physical layer frame structure, employing TDM-TDM way to set down and up transfer areas; setting down/up transfer area on up/down subframe of physical layer frame structure of RSS FDD wireless receiver to define the transfer sub-channel of down/up transfer area and OFDMA label combination; among BS, RS and UE, using the said set BS and up-down physical layer frame of RS for wireless transfer communication by FDD way. This invention can ensure the transfer communication without interface.

Description

Wireless transfer communication OFDM access system and method
Technical field
The present invention relates to wireless communication technology field, relate in particular to a kind of wireless transfer communication OFDM access system and method.
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 MS (mobile subscriber station).
Present 802.16 Multihop Relay SG (802.16 multi-hop transfer seminar) have only proposed the notion of the RS (terminal) of WiMAX (micro-wave access to global intercommunication), the important effect of described RS is as the transfer communication entity between BS and SS/MS, 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 (subscriber station) can be half-duplex FDD.And for the frequency range of exempting to authorize, duplex mode can only be TDD.And for the frequency range of exempting to authorize, duplex mode can only be TDD.802.16 OFDMA (or SOFDMA) frame structure under the FDD, as shown in Figure 2.In 802.16 OFDMA (or SOFDMA) mode, the PHYburst (burst) among the OFDMA (or SOFDMA) has been assigned with one group of adjacent subchannel and one group of OFDMA symbol.
The data of transmitting on physical channel are that the form with frame transmits.Every frame comprises DL (descending sub frame) and UL (sub-frame of uplink).Under 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/MS (or one group of user) up, can issue SS/MS 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 and UL-MAP 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.
The senior transfer communication mode configuration schematic diagram of the RS of prior art and BS, MS/SS adopts the FDD/TDM/OFDM 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 as shown in Figure 3 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 shortcoming of above-mentioned senior transfer communication pattern is:
1, RS need have two cover FDD transceivers, complex structure, cost height.
2, under the FDD communication pattern, may there be the phase mutual interference of 4 kinds of situations shown in Fig. 4 (a)-(d) in network system communication.Wherein, TX represents sending module, and RX represents receiver module.
Summary of the invention
The purpose of this invention is to provide a kind of wireless transfer communication OFDM access system and method, thereby can in communication system, realize OFDMA transfer communication, and can avoid the various interference that may exist effectively based on the RS of single FDD transceiver.
The objective of the invention is to be achieved through the following technical solutions:
A kind of wireless transfer communication system, comprise base station BS, terminal RS and user terminal, this RS provides the interface with BS and user terminal communication respectively, and in this RS, comprise a FDD transceiver, FDD transceiver among the described RS up with BS in the identical frequency of the descending employing of FDD transceiver, FDD transceiver among the RS descending with BS in the identical frequency of the up employing of FDD transceiver, wherein, FDD transmitting set 1 physical layer element that a FDD transceiver in the user terminal comprises and FDD wireless receiver 1 physical location are corresponding with FDD wireless receiver physical layer element and FDD transmitting set physical layer element among the BS, and FDD transmitting set 2 physical layer elements that the 2nd FDD transceiver in the user terminal comprises and FDD wireless receiver 2 physical locations are corresponding with FDD wireless receiver physical layer element and FDD transmitting set physical layer element among the RS.
Described user terminal comprises:
The physical layer processing unit of FDD transmitting set 1: respectively with the data link layer deals unit of FDD transceiver and the BS that can communicate with in FDD wireless receiver physical layer processing unit carry out radio communication;
The physical layer processing unit of FDD transmitting set 2: respectively with the data link layer deals unit of FDD transceiver and the RS that can communicate with in FDD wireless receiver physical layer processing unit carry out radio communication;
The physical layer processing unit of FDD wireless receiver 1: respectively with the data link layer deals unit of FDD transceiver and the BS that can communicate with in the physical layer processing unit of FDD transmitting set carry out radio communication;
FDD wireless receiver 2 physical layer processing unit: respectively with the data link layer deals unit of FDD transceiver and the RS that can communicate with in the transmitting set physical layer processing unit carry out radio communication;
The data link layer deals unit of FDD transceiver: to data from the physical layer processing unit of FDD wireless receiver 1 and/or 2, after making the data processing of FDD transceiver data link layer, be transmitted to the physical layer processing unit of FDD transmitting set 1 and/or 2.
Described RS comprises:
FDD transmitting set physical layer processing unit: respectively with RS in FDD wireless receiver physical layer processing unit or the FDD transceiver data link layer among the RS and the user terminal that can communicate with in the physical layer processing unit or the BS FDD wireless receiver physical layer processing unit of FDD wireless receiver 2 carry out radio communication;
FDD wireless receiver physical layer processing unit: respectively with RS in FDD transmitting set physical layer processing unit or the FDD transceiver data link layer among the RS and the user terminal that can communicate with in the physical layer processing unit of FDD transmitting set 2 or the FDD transmitting set physical layer processing unit among the BS carry out radio communication.
Described RS comprises:
FDD transceiver data link layer deals unit: to data from FDD wireless receiver physical layer processing unit, make the data processing of FDD transceiver data link layer after, be transmitted to the user.To from user's data, make the data processing of FDD transceiver data link layer after, be transmitted to FDD transmitting set physical layer processing unit.
Described BS comprises:
The wire transmission processing unit: with upper level equipment 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;
FDD transmitting set physical layer processing unit: respectively with the FDD transceiver data link layer and the user terminal that can communicate with in FDD wireless receiver 1 physical layer processing unit or the FDD wireless receiver physical layer processing unit among the RS carry out radio communication;
FDD wireless receiver physical layer processing unit: respectively with the FDD transceiver data link layer and the user terminal that can communicate with in FDD transmitting set 1 physical layer processing unit or the FDD transmitting set physical layer processing unit among the RS carry out radio communication;
FDD transceiver data link layer deals unit: after the data from FDD wireless receiver physical layer processing unit that will receive are made the data processing of FDD transceiver data link layer, be transmitted to the wire transmission processing unit.After the data from wire transmission processing unit unit that receive are made the data processing of FDD transceiver data link layer, be transmitted to FDD transmitting set physical layer processing unit.
Described BS also provides the interface with user terminal communication, when the user terminal direct communication under BS and the RS covering, described BS is by adopting the chnnel coding different with other transmission data and modulation system or different transmitting power with lead code Preamble, frame control head FCH, descending mapping table DL-MAP and up mapping table UL-MAP information directly send to user terminal from this interface, initial ranging Ranging competition slot and bandwidth request competition slot to the sub-frame of uplink of BS, or range finding subchannel RangingSubchannel, user terminal adopts with the different chnnel coding of other transmission data and directly sends to BS by user terminal with modulation system or different transmitting powers, does not carry out transfer by RS.
A kind of method of the realization wireless transfer communication based on said system comprises:
A, in the descending sub frame of BS physical layer frame structure 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 the physical layer frame structure of the FDD of RS wireless receiver, descending transfer district is set, be used to define rotor channel and the OFDMA symbol combination that RS receives the descending transfer district of BS, in the descending sub frame of the physical layer frame structure of the FDD of RS transmitting set, up transfer district is set, is used to define rotor channel and the OFDMA symbol combination that RS receives the up transfer district of BS;
B, the uplink and downlink physical layer frame based on the BS of described setting and RS between BS, RS and user terminal adopt the FDD mode to carry out wireless transfer communication.
Described steps A also comprises:
During the up transfer district of BS correspondence, the user terminal that belongs to BS is not arranged any transmission subchannel and OFDMA symbol combination, in during the descending transfer district of BS correspondence, the user terminal that belongs to RS is not arranged any transmission subchannel and OFDMA symbol combination, and the described uplink and downlink transfer district that is provided with in BS and RS selects to be provided with in each frame.
Described steps A also comprises:
When having at least two RS, these at least two RS share downlink or uplink transfer district by different subchannels and OFDMA symbol combination, the FDD transmitting set of different RS only sends the interim data of BS in corresponding subchannel and the OFDMA symbol combination in descending transfer district, in other subchannel and OFDMA symbol combination, do not arrange to send the interim data of BS, the FDD wireless receiver of different RS only receives the interim data of BS in corresponding subchannel and the OFDMA symbol combination in descending transfer district, do not arrange to receive the interim data of BS in other subchannel and OFDMA symbol combination.
Described steps A also comprises:
In the descending sub frame of the physical layer frame structure of BS, descending transfer broadcast sub-channels is set, is used to define downlink sub-channels and the OFDMA symbol combination that is broadcast to RS by BS;
In the descending sub frame of the physical layer frame structure of the FDD of RS wireless receiver, descending transfer broadcast sub-channels is set, is used to define the up subchannel of RS and the OFDMA symbol combination that receive the descending transfer broadcasting of BS;
The described descending transfer broadcast sub-channels that is provided with in BS and RS is selected to be provided with in each frame.
Described steps A also comprises:
Definition transfer range finding subchannel in the up transfer district of the sub-frame of uplink of the physical layer frame structure of BS, 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, and this transfer range finding subchannel also can be used as initial access range finding Ranging, Perodic ranging Ranging, the bandwidth request range finding subchannel of user terminal and uses;
Transfer range finding subchannel is set in the descending transfer district of the physical layer frame structure of the FDD of RS transmitting set, is used to define initial access range finding Ranging, the Perodic ranging Ranging of RS, the RS transfer range finding of bandwidth request sends subchannel and OFDMA symbol combination;
The time-frequency relation of the described transfer range finding subchannel that is provided with in BS and RS must be corresponding one by one, and strict synchronism is selected to be provided with in each frame.
Described steps A also comprises:
In the descending sub frame of the physical layer frame structure of the FDD transmitting set of the sub-frame of uplink of the physical layer frame structure of BS or RS, during the correspondence in descending sub frame head and up transfer district, the FDD transmitting set of BS receiver and different RS is shared the remainder of RS descending sub frame or BS sub-frame of uplink by different subchannels and OFDMA symbol combination;
In the sub-frame of uplink of the physical layer frame structure of the FDD wireless receiver of the descending sub frame of the physical layer frame structure of BS or RS, receive except that descending sub frame head, descending sub frame head and descending transfer district, the FDD wireless receiver of BS transmitter and different RS is by the remainder of the sub-frame of uplink of the FDD wireless receiver of different subchannels and shared BS descending sub frame of OFDMA symbol combination or RS.
Described steps A also comprises:
Definition descending sub frame head in the descending sub frame of the physical layer frame structure of BS, this descending sub frame head is the beginning 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 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, this descending sub frame head all is provided with in every frame.
Described steps A also comprises:
During user terminal direct communication under BS can't cover with RS, definition descending sub frame head in the descending sub frame of the physical layer frame structure of the FDD of RS transmitting set, this descending sub frame head is the beginning 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 indication RS 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, this descending sub frame head all is provided with in every frame.
Described steps A also comprises:
During user terminal direct communication under BS can't cover with RS, the descending sub frame head that defines in the descending sub frame of described physical layer frame structure at the FDD of RS transmitting set lags behind the descending sub frame head that defines in the descending sub frame of described physical layer frame structure at BS in time, and during the descending sub frame head of the FDD of RS transmitting set, BS can not arrange any reception subchannel and OFDMA symbol combination.
Described steps A also comprises:
When having at least two RS, during the descending sub frame head of the FDD of RS transmitting set, the descending sub frame of the physical layer frame structure of the FDD transmitting set of other RS is not arranged any transmission subchannel and OFDMA symbol combination,
Or,
When having at least two RS, if the descending sub frame head of the FDD transmitting set of different RS is overlapping in time, then must be overlapping fully, strict synchronism, and its descending sub frame head content must be identical.
Described steps A also comprises:
The descending sub frame head is set in the physical layer frame structure of the FDD of RS wireless receiver to be received, be used to define the subchannel and the OFDMA symbol combination of the descending sub frame head that receives BS, the time-frequency relation of the descending sub frame head of this descending sub frame head reception and described BS must be corresponding one by one, fully synchronously, this descending sub frame head receives subchannel and select setting in each frame.
Described steps A also comprises:
Definition range finding subchannel in the sub-frame of uplink of the physical layer frame structure of BS, definition are used for initial access range finding Ranging, the Perodic ranging Ranging of user terminal, the BS range finding of bandwidth request receives subchannel and OFDMA symbol combination;
During user terminal direct communication under BS can't cover with RS, definition range finding subchannel in the sub-frame of uplink of the physical layer frame structure of the FDD of RS wireless receiver, definition is used for initial access range finding Ranging, the Perodic ranging Ranging of user terminal, the RS range finding of bandwidth request receives subchannel and OFDMA symbol combination
The described range finding subchannel that defines in BS and RS all is provided with in every frame.
Described step B specifically 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, descending transfer broadcast sub-channels, transfer range finding subchannel, descending sub frame head, descending sub frame head receive, the range finding subchannel carries out the mutual of message, realize wireless transfer communication.
A kind of method that realizes wireless transfer communication based on OFDM access OFDMA-FDD comprises:
By the downlink communication process of BS to user terminal:
C, BS send data to RS in the descending sub frame of BS, RS receives described data by the FDD wireless receiver of RS;
D, RS transmit the described data that receive by the descending sub frame of the FDD transmitting set of RS and give user terminal;
By the uplink communication process of user terminal to BS:
The interval uplink communication data that send of E, the user terminal time-frequency during the up transfer district correspondence of BS, RS receives this data;
F, RS send up transfer communication data to BS by the up transfer district of descending sub frame, and BS receives this up transfer communication data in sub-frame of uplink.
Described step C specifically comprises:
C1, BS send lead code in the descending sub frame head of descending sub frame, the descending sub frame head of RS by the FDD wireless receiver of RS receives that subchannel receives this lead code and BS obtains synchronously;
C2, BS have sent described lead code in descending sub frame after, send FCH, DL-MAP and UL-MAP information, the descending sub frame head of RS by the FDD wireless receiver of RS receives subchannel and receives this FCH, DL-MAP and UL-MAP information, obtains subchannel and OFDMA symbol combination position and the using method profile information of descending and up each burst of BS;
C3, BS utilize the descending transfer broadcast transmission broadcast in the descending transfer district of descending sub frame, BS sends descending transfer communication data to RS in the descending transfer RS in the descending transfer district of descending sub frame, RS receives described broadcast by the descending transfer broadcast sub-channels of the FDD wireless receiver of RS, and RS receives described descending transfer communication data by the descending transfer district of the FDD wireless receiver of RS.
Described step D specifically comprises:
D1, send lead code in the descending sub frame head of the descending sub frame of the FDD of RS transmitting set, user terminal receives this lead code and RS obtains synchronously;
The FDD transmitting set of D2, RS sends FCH, DL-MAP, UL-MAP information in descending sub frame, this FCH, DL-MAP, UL-MAP information can send to RS by BS, user terminal receives this FCH, DL-MAP, UL-MAP information, obtains subchannel and OFDMA symbol combination position and the using method profile information of descending and up each burst of RS;
The FDD transmitting set of D3, RS sends descending transfer communication data to user terminal in the time-frequency interval except that descending sub frame head, descending transfer district of descending sub frame, described transfer communication data send to the FDD transmitting set of RS by BS, and user terminal is from interval these the descending transfer communication data that receive of corresponding time-frequency;
Or
Lead code in the descending sub frame head of the descending sub frame of D4, user terminal reception BS, obtain synchronously with BS, FCH, DL-MAP and UL-MAP information in the descending sub frame head of the descending sub frame of user terminal reception BS, subchannel and OFDMA symbol combination position and the using method profile information of descending and up each burst of acquisition BS and RS;
The FDD transmitting set of D5, RS is in descending sub frame, send descending transfer communication data to user terminal in the interval of the time-frequency except that descending sub frame head, descending transfer district, described transfer communication data send to the FDD transmitting set of RS by BS, and user terminal is from interval these the descending transfer communication data that receive of corresponding time-frequency.
Described step e specifically comprises:
After E1, user terminal receive described FCH, DL-MAP, UL-MAP information, subchannel and OFDMA symbol combination position and the using method profile information of descending and up each burst of the FDD transmitting set of acquisition RS, user terminal is in the sub-frame of uplink of the FDD of RS wireless receiver, the interval uplink communication data that send of time-frequency during the up transfer district correspondence of BS are to RS, and the FDD wireless receiver of RS is from interval these uplink communication data that receive of corresponding time-frequency;
Or
After E2, user terminal receive FCH, DL-MAP, the UL-MAP information of descending sub frame head of descending sub frame of described BS, obtain subchannel and OFDMA symbol combination and the using method profile information of descending and up each burst of BS and RS, user terminal is at the sub-frame of uplink of the FDD of RS wireless receiver, the interval uplink communication data that send of time-frequency during the up transfer district correspondence of BS are to RS, and the FDD wireless receiver of RS is from interval these uplink communication data that receive of corresponding time-frequency.
Described step F specifically comprises:
The FDD wireless receiver of F1, RS receives FCH, DL-MAP and the UL-MAP information of descending sub frame head of the descending sub frame of BS, obtains subchannel and OFDMA symbol combination position and the using method profile information of descending and up each burst of BS;
The FDD transmitting set of F2, RS sends up transfer communication data to BS in the up transfer RS in the up transfer district of the descending sub frame of RS, these transfer communication data send to RS by BS, and BS receives these up transfer communication data in the up transfer RS in the up transfer district of sub-frame of uplink.
As seen from the above technical solution provided by the invention, the present invention is by introducing the mechanism that FDD, TDM combine with OFDM (or SC), and the physical layer frame structure of definition BS and RS is compared with prior art, has following advantage:
1, support the wireless senior transfer pattern of OFDMA (or SOFDMA), promptly MS/SS can carry out wireless transfer access BS by RS;
2, 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;
3, RS only needs a cover FDD transceiver, can guarantee effectively between RS and BS, MS/SS that simple in structure, cost is low the communicating by letter of FDD/TDM/TDMA mode;
4, can avoid that " RS is to SS/MS in the prior art BS", " BS is to SS/MS RS", " SS/MS BSTo RS ", " SS/MS RSTo BS " and self interference of " RS is to RS ";
4, can avoid that " RS is to SS/MS RS" interference;
5, can avoid " SS/MS BSTo BS ", " SS/MS RSTo RS ", " SS/MS RSTo SS/MS BS", " SS/MS BSTo SS/MS RS" interference.
Description of drawings
Fig. 1 is the adjacent situation schematic diagram of OFDMA symbol subcarrier;
Fig. 2 is based on 802.16 OFDMA (or SOFDMA) the frame structure schematic diagram in the communication system of FDD;
Fig. 3 is the RS of prior art and the senior transfer communication mode configuration schematic diagram of BS, MS/SS;
Fig. 4 for prior art based on the co-channel interference pattern diagram that may exist in the communication system of two FDD;
Fig. 5 is the senior transfer communication pattern diagram of RS of the present invention and BS, MS/SS;
Fig. 6 is the simplification transfer communication pattern diagram of RS of the present invention and BS, MS/SS;
Fig. 7 is for of the present invention based on the co-channel interference pattern diagram that may exist in the ofdma communication system of single FDD;
Fig. 8 is the functional framework schematic diagram of the transfer communication system of RS of the present invention and BS, MS/SS;
Fig. 9 is BS under the senior transfer communication pattern of the present invention and the physical layer frame structure schematic diagram of RS;
Figure 10 is BS under the simplification transfer communication pattern of the present invention and the physical layer frame structure schematic diagram of RS.
Embodiment
The invention provides a kind of wireless transfer communication OFDM access system and method, the senior transfer communication pattern of RS provided by the invention and BS, MS/SS, as shown in Figure 5, adopt the FDD/TDM/OFDMA mode to communicate by letter between RS and BS, MS/SS, descending and the up employing frequency f 1 of RS of BS, the up and descending employing frequency f 2 of RS of BS; RS only needs a cover FDD transceiver, and RS inserts BS as a MS/SS, and MS/SS carries out wireless transfer by RS and inserts BS.
In Fig. 5, 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 BSKeep receiving frame synchronous with BS; 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 RS.
The simplification transfer communication pattern of RS provided by the invention and BS, MS/SS, as shown in Figure 6.Descending and the up employing frequency f 1 of RS of BS, the up and descending employing frequency f 2 of RS of BS, RS only need have a cover FDD transceiver.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 BSOr SS/MS RSKeep receiving frame synchronous with BS.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.
DL BSBroadcast Burst (downlink 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 RangingSubchannel, 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.
Under fdd mode, above-mentioned senior with simplify the transfer communication pattern and have mutual interference mutually as 4 kinds of situations of Fig. 7 (a)-(d).Wherein, TX represents sending module, and RX represents receiver module.
The functional framework of wireless transfer communication OFDM access system provided by the invention as shown in Figure 7, this wireless transfer communication OFDM access system comprises BS, RS and SS/MS.
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;
FDD transceiver: be used for carrying out radio communication in the FDD mode, form by FDD transmitting set physical layer processing unit, FDD wireless receiver physical layer processing unit and FDD transceiver data link layer deals unit with RS or SS/MS.
Wherein, FDD transmitting set physical layer processing unit (frequency is f1): respectively with the FDD transceiver data link layer and the SS/MS that can communicate with in FDD wireless receiver 1 physical layer processing unit or the FDD wireless receiver physical layer processing unit among the RS 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.
Wherein, FDD wireless receiver physical layer processing unit (frequency is f2): respectively with the FDD transceiver data link layer and the SS/MS that can communicate with in FDD transmitting set 1 physical layer processing unit or the FDD transmitting set physical layer processing unit among the RS carry out radio communication.
Wherein, FDD transceiver data link layer deals unit: after the data from FDD wireless receiver physical layer processing unit that will receive are made the data processing of FDD transceiver data link layer, be transmitted to the wire transmission processing unit.After the data from wire transmission processing unit unit that receive are made the data processing of FDD transceiver data link layer, be transmitted to FDD transmitting set physical layer processing unit.
SS/MS comprises:
FDD transceiver: be used for carrying out radio communication in the FDD mode, form by the physical layer processing unit of the physical layer processing unit of FDD transmitting set 1 and 2, FDD wireless receiver 1 and 2 and the data link layer deals unit of FDD transceiver with BS or RS.
Wherein, the physical layer processing unit of FDD transmitting set 1 (frequency is f2): respectively with the data link layer deals unit of FDD transceiver and the BS that can communicate with in 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 RangingSubchannel, 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.
The physical layer processing unit of FDD transmitting set 2 (frequency is f1): respectively with the data link layer deals unit of FDD transceiver and the RS that can communicate with in FDD wireless receiver physical layer processing unit carry out radio communication.
The physical layer processing unit of FDD wireless receiver 1 (frequency is f1): respectively with the data link layer deals unit of FDD transceiver and the BS that can communicate with in the physical layer processing unit of FDD transmitting set carry out radio communication.
FDD wireless receiver 2 physical layer processing unit (frequency is f2): respectively with the data link layer deals unit of FDD transceiver and the RS that can communicate with in the transmitting set physical layer processing unit carry out radio communication;
The data link layer deals unit of FDD transceiver: to data from the physical layer processing unit of FDD wireless receiver 1 and/or 2, after making the data processing of FDD transceiver data link layer, be transmitted to the physical layer processing unit of FDD transmitting set 1 and/or 2.
RS comprises:
FDD transceiver: be used for carrying out radio communication in the FDD mode, form by FDD transmitting set physical layer processing unit, FDD wireless receiver physical layer processing unit and FDD transceiver data link layer deals unit with SS/MS or BS.
FDD transmitting set physical layer processing unit: respectively with RS in FDD wireless receiver physical layer processing unit or the FDD transceiver data link layer among the RS and the SS/MS that can communicate with in the physical layer processing unit or the BS FDD wireless receiver physical layer processing unit of FDD wireless receiver 2 carry out radio communication;
FDD wireless receiver physical layer processing unit: respectively with RS in FDD transmitting set physical layer processing unit or the FDD transceiver data link layer among the RS and the SS/MS that can communicate with in the physical layer processing unit of FDD transmitting set 2 or the FDD transmitting set physical layer processing unit among the BS carry out radio communication;
FDD transceiver data link layer deals unit: to data from FDD wireless receiver physical layer processing unit, make the data processing of FDD transceiver data link layer after, be transmitted to the user.To from user's data, make the data processing of FDD transceiver data link layer after, be transmitted to FDD transmitting set physical layer processing unit.
The present invention is for realizing above-mentioned wireless transfer communication OFDM access system, the physical layer frame structure of rational BS and RS need be set, thereby guarantee that the transfer communication process can realize reliably, simultaneously, can also avoid the various interference that may exist among Fig. 7 effectively.
In the implementation 1 of the physical layer frame structure of BS and RS, need to carry out following setting:
1, the frequency at the physical layer frame structure of BS is the descending sub frame DL of f1 BSThe middle TDM 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; For the situation of many RS, many RS share DL Relay Zone by different subchannels and OFDMA symbol combination;
2, in the frequency of RS be the sub-frame of uplink UL of physical layer frame structure of the RX (FDD wireless receiver) of f1 RSThe middle TDM technology that adopts is opened up " DL Relay Zone (descending transfer district) ", is used to define rotor channel and the OFDMA symbol combination that RS receives the DL Relay Zone of BS; Situation for many RS, many RS share DL Relay Zone by different subchannels and OFDMA symbol combination, the RX of different RS only receives the interim data of BS in corresponding subchannel and the OFDMA symbol combination in DL Relay Zone, other subchannel and OFDMA symbol combination do not arrange to receive the interim data of BS;
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 UL Relay Zone by different subchannels and OFDMA symbol combination;
4, in the frequency of RS be the descending sub frame DL of physical layer frame structure of the TX (FDD transmitting set) of f2 BSThe middle TDM technology that adopts is opened up UL Relay Zone (up transfer district), is 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 UL Relay Zone by different subchannels and OFDMA symbol combination, the TX of different RS only sends the interim data of BS in corresponding subchannel and the OFDMA symbol combination in DL Relay Zone, other subchannel and OFDMA symbol combination can not arrange to send;
5, during the UL of BS Relay Zone correspondence, SS/MS BSDo not arrange any transmission subchannel and OFDMA symbol combination, avoid " SS/MS BSTo BS " interference; During the DL of BS RelayZone correspondence, SS/MS RSDo not arrange any transmission to send subchannel and OFDMA symbol combination, avoid " SS/MS RSTo RS " interference;
6, 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 broadcasts DCD, UCD, FPC, the CLK CMP broadcasting packet of 802.16 standard definitions;
7, in being the DL Relay Zone of physical layer frame structure of RX of f1, the frequency of RS opens up DLRelay Broadcast Subchannel (descending transfer broadcast sub-channels), be used to define the up subchannel of RS and the OFDMA symbol combination that receive the descending transfer broadcasting of BS, receive DCD, UCD, FPC, the CLK CMP broadcasting packet of 802.16 standard definitions;
8, 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 RRS also can be used as SS/MS BSInitial access range finding Ranging, Perodic ranging Ranging, bandwidth request range finding subchannel use;
9, in being the DL Relay Zone of physical layer frame structure of TX of f2, the frequency of RS opens up RelayRanging 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;
10, the time-frequency of the Relay Ranging TXSubchannel of the TX of the Relay Ranging Subchannel of BS and RS relation must be corresponding one by one, strict synchronism;
11, in the descending sub frame of the TX physical layer frame structure of the sub-frame of uplink of BS physical layer frame structure or RS, except that DL Header, UL Relay Zone and BS are during the correspondence of the DL of the TX of RX Header, the TX of BS receiver and different RS shares the remainder of RS descending sub frame or BS sub-frame of uplink by different subchannels and OFDMA symbol combination, avoids " SS/MS BSTo SS/MS RS" interference;
12, in the sub-frame of uplink of the physical layer frame structure of the RX of the descending sub frame of BS physical layer frame structure or RS, except that DL Header, DL Header RX and DL Relay Zone, the RX of BS transmitter and different RS shares the remainder of the RX sub-frame of uplink of BS descending sub frame or RS by different subchannels and OFDMA symbol combination, avoids " SS/MS RSTo SS/MS BS" interference;
13, 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), this DL Header is the beginning 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 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.This DL Header comprises preamble, FCH, DL-MAP, the UL-MAP in former 802.16 OFDMA (or SOFDMA) frame, and SS/MSBS, RS and BS keep receiving frame synchronous;
14, in described senior transfer communication pattern, in the frequency of RS the descending sub frame DL of physical layer frame structure of the TX of f2 RSMiddle definition DL Header (descending sub frame head), this DL Header is the beginning 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 indication RS 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.This DLHeader comprises preamble, FCH, DL-MAP, the UL-MAP in former 802.16 OFDMA (or SOFDMA) frame, and SS/MSRS and RS keep receiving frame synchronous;
15, in described senior transfer communication pattern, the DL Header of the TX of RS lags behind the DL Header of BS in time; During the DL Header of the TX of RS, the BS receiver can not be arranged any reception subchannel and OFDMA symbol combination;
16, in described senior transfer communication pattern, during the DL Header of the TX of RS, the DL of the physical layer frame structure of other RS TX RSCan not arrange any transmission subchannel and OFDMA symbol combination, avoid that " RS is to SS/MS RS" interference; In particular cases, if the DLHeader of the TX of different RS 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;
17, in the frequency of RS is the physical layer frame structure of FDD wireless receiver RX of f1, open up DLHeader RX (reception of descending sub frame head), be used to define subchannel and the OFDMA symbol combination of the DL Header that receives BS;
18, the time-frequency of the DL Header RX of the RX of the DL Header of BS and RS concerns correspondence, strict synchronism one by one;
19, the frequency at the physical layer frame structure of BS is the sub-frame of uplink UL of f2 BSMiddle definition RangingSubchannel (range finding subchannel), definition is used for SS/MS BSInitial access range finding Ranging, Perodic ranging Ranging, the BS range finding of bandwidth request receive subchannel and OFDMA symbol combination;
20, in described senior transfer communication pattern, in the frequency of RS the sub-frame of uplink UL of physical layer frame structure of the FDD wireless receiver RX of f1 RSMiddle definition Ranging Subchannel (range finding subchannel), definition is used for SS/MS RSInitial access range finding Ranging, Perodic ranging Ranging, the RS range finding of bandwidth request receive subchannel and OFDMA symbol combination;
21, the DL Header of above-mentioned definition, Ranging Subchannel are provided with in every frame, and other subchannel of above-mentioned definition and OFDMA symbol combination or Zone select to be provided with in every frame.
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 Fig. 9 and shown in Figure 10, wherein, Fig. 9 is BS under the senior transfer communication pattern and the physical layer frame structure schematic diagram of RS, and Figure 10 is for simplifying BS under the transfer pattern and the physical layer frame structure schematic diagram of RS.Among Fig. 9 and Figure 10, the transmission of RS, BS and receive frequency are as the criterion with the frequency marking of frame high order end in scheming, wherein " NULL " or the blank parts part for not arranging any reception or transmission.
To the concrete frame structure among Fig. 9 and Figure 10 be described below:
The descending sub frame DL of BS BSIn " vertical white band shape zone ", comprising DL BSPreamble, FCH, DL-MAP and UL-MAP be DL Header; The RX sub-frame of uplink UL of RS RSIn " vertical white band shape zone ", comprising UL RSSync with BS, Get MAPinfo be DL Header RX.
The DL Relay Zone of BS (being DL Relay broadcast, DL Relay R#1, #2... part) is arranged in the descending sub frame DL of BS BSDL Header after, the UL Relay Zone of BS (being the TX part of UL Relay R#1, #2... and RRS) is arranged in the descending sub frame DL of BS BSThe beginning part.During the UL of BS Relay Zone correspondence, SS/MS BSDo not arrange any transmission subchannel and OFDMA symbol combination; During the DL of BS Relay Zone correspondence, SS/MS RSDo not arrange any transmission to send subchannel and OFDMA symbol combination.
PHYburst (burst) has been assigned with one group of adjacent subchannel and one group of OFDMA symbol (symbol).In the TX of BS sub-frame of uplink or RS descending sub frame, except that DL Header, ULRelay Zone and BS were during the correspondence of the DL of the TX of RX Header, the TX of BS receiver and different RS shared the remainder of RS descending sub frame or BS sub-frame of uplink by different subchannels and OFDMA symbol combination; In the RX of BS descending sub frame or RS sub-frame of uplink, except that DL Header, DLHeader RX and DL Relay Zone, the RX of BS transmitter and different RS shares the remainder of BS descending sub frame or RS RX sub-frame of uplink by different subchannels and OFDMA symbol combination.
The present invention also provide concrete based on above-mentioned setting BS and the handling process of the described wireless transfer communication OFDM access system of the physical layer frame structure of RS, 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 communication 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 send lead code preamble.
2, RS#1 is the descending sub frame DL of the DL Header RX reception BS of f1 by the frequency of the RX of RS BSDL Header in lead code preamble and BS obtain synchronously.
3, BS is the descending sub frame DL of f1 in frequency BSDL Header in sent after the preamble, send FCH, DL-MAP, and UL-MAP information.
4, the frequency of RS#1 by the RX of RS is the FCH that the DL Header RX of f1 receives the DL Header of descending sub frame DLBS, DL-MAP, and UL-MAP information, obtain subchannel and OFDMA character position and the 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 Relaybroadcast 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 the RX frequency of RS BSThe DL Relay broadcast of DLRelay 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 the RX frequency of RS 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 communication pattern, the processing in this stage comprises:
1, the TX of RS#1 is at descending sub frame DL RSFrequency be to send lead code preamble among the DL Header of f2.
2, MS/SS receives the TX descending sub frame DL of RS#1 RSDL Header in lead code preamble and RS#1 obtain synchronously.
3, the TX of RS#1 is at descending sub frame DL RSFrequency is to have sent after the preamble among the DL Header of f2, sends FCH, DL-MAP, UL-MAP; 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 the TX descending sub frame DL of RS#1 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 RS#1.
5, the TX of RS#1 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 2, described transfer communication data are sent to the TX of RS#1 by BS in step 6.
6, MS/SS is from the interval TX descending sub frame DL that receives RS#1 of corresponding time-frequency RSIn descending transfer communication data traffic data.
For simplifying the transfer communication pattern, the processing procedure in this stage specifically comprises:
1, MS/SS receives the descending sub frame DL of BS BSDL Header in lead code preamble, thereby obtain synchronously with BS.
2, MS/SS receives the descending sub frame DL of BS 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, the TX of RS#1 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 2, described transfer communication data are sent to the TX of RS#1 by BS in the step 6 of phase I.
4, MS/SS is from the interval TX descending sub frame DL that receives RS#1 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 communication pattern, then corresponding processing procedure comprises:
1, MS/SS receives the descending sub frame DL of the TX of RS#1 RSFrequency is the FCH of the DL Header of f2, DL-MAP, and UL-MAP obtains subchannel and OFDMA character position and using method (profile) information of descending and up each burst of the first cover transmitting set of RS#1.
2, MS/SS is at the RX of RS#1 sub-frame of uplink UL RSIn, the time-frequency interval during the UL Relay Zone correspondence of BS sends uplink communication data traffic data to RS#1 with frequency f 1.
3, the RX of RS#1 receives MS/SS sub-frame of uplink UL with frequency f 1 from corresponding time-frequency interval RSIn uplink communication data traffic data.
In this stage, for simplifying the transfer communication pattern, then corresponding processing procedure comprises:
1, MS/SS receives the descending sub frame DL of BS BSFrequency is the FCH of the DL Header of f1, DL-MAP, and UL-MAP obtains BS and RS#1 is descending and the subchannel of up each burst and OFDMA character position and using method (profile) information.
2, MS/SS is at the RX of RS#1 sub-frame of uplink UL RSIn, the time-frequency interval during the UL Relay Zone correspondence of BS sends uplink communication data traffic data to RS#1 with frequency f 1.
3, the RX of RS#1 receives MS/SS sub-frame of uplink UL with frequency f 1 from corresponding time-frequency interval RSIn uplink communication data traffic data.
(2) second stage (RS-〉BS):
In this stage, senior transfer communication pattern adopts identical processing mode with simplification transfer communication pattern;
1, the RX of RS#1 receives the descending sub frame DL of BS BSMedium frequency is f1's FCH, DL-MAP and the UL-MAP of " DL Header ", obtains subchannel and OFDMA character position and using method (profile) information of descending and up each burst of BS.
2, the TX of RS#1 is with the descending sub frame DL of frequency f 2 at RS RSThe ULRelay RS#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 is by introducing the mechanism that FDD, TDM combine with OFDMA, be defined in BS and RS physical frame structure under senior transfer communication pattern of FDD/OFDMA/TDM and the simplification transfer communication pattern, realized that RS only need have BS, RS and the SS/MS wireless transfer communication OFDM access system of a cover FDD transceiver.
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 (24)

1, a kind of wireless transfer communication system, it is characterized in that, comprise base station BS, terminal RS and user terminal, this RS provides the interface with BS and user terminal communication respectively, and in this RS, comprise a FDD transceiver, FDD transceiver among the described RS up with BS in the identical frequency of the descending employing of FDD transceiver, FDD transceiver among the RS descending with BS in the identical frequency of the up employing of FDD transceiver, wherein, FDD transmitting set 1 physical layer element that a FDD transceiver in the user terminal comprises and FDD wireless receiver 1 physical location are corresponding with FDD wireless receiver physical layer element and FDD transmitting set physical layer element among the BS, and FDD transmitting set 2 physical layer elements that the 2nd FDD transceiver in the user terminal comprises and FDD wireless receiver 2 physical locations are corresponding with FDD wireless receiver physical layer element and FDD transmitting set physical layer element among the RS.
2, wireless transfer communication system according to claim 1 is characterized in that, described user terminal comprises:
The physical layer processing unit of FDD transmitting set 1: respectively with the data link layer deals unit of FDD transceiver and the BS that can communicate with in FDD wireless receiver physical layer processing unit carry out radio communication;
The physical layer processing unit of FDD transmitting set 2: respectively with the data link layer deals unit of FDD transceiver and the RS that can communicate with in FDD wireless receiver physical layer processing unit carry out radio communication;
The physical layer processing unit of FDD wireless receiver 1: respectively with the data link layer deals unit of FDD transceiver and the BS that can communicate with in the physical layer processing unit of FDD transmitting set carry out radio communication;
FDD wireless receiver 2 physical layer processing unit: respectively with the data link layer deals unit of FDD transceiver and the RS that can communicate with in the transmitting set physical layer processing unit carry out radio communication;
The data link layer deals unit of FDD transceiver: to data from the physical layer processing unit of FDD wireless receiver 1 and/or 2, after making the data processing of FDD transceiver data link layer, be transmitted to the physical layer processing unit of FDD transmitting set 1 and/or 2.
3, wireless transfer communication system according to claim 1 is characterized in that, described RS comprises:
FDD transmitting set physical layer processing unit: respectively with RS in FDD wireless receiver physical layer processing unit or the FDD transceiver data link layer among the RS and the user terminal that can communicate with in the physical layer processing unit or the BS FDD wireless receiver physical layer processing unit of FDD wireless receiver 2 carry out radio communication;
FDD wireless receiver physical layer processing unit: respectively with RS in FDD transmitting set physical layer processing unit or the FDD transceiver data link layer among the RS and the user terminal that can communicate with in the physical layer processing unit of FDD transmitting set 2 or the FDD transmitting set physical layer processing unit among the BS carry out radio communication.
4, wireless transfer communication system according to claim 3 is characterized in that, described RS comprises:
FDD transceiver data link layer deals unit: to data from FDD wireless receiver physical layer processing unit, make the data processing of FDD transceiver data link layer after, be transmitted to the user.To from user's data, make the data processing of FDD transceiver data link layer after, be transmitted to FDD transmitting set physical layer processing unit.
5, wireless transfer communication system according to claim 2 is characterized in that, described BS comprises:
The wire transmission processing unit: with upper level equipment 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;
FDD transmitting set physical layer processing unit: respectively with the FDD transceiver data link layer and the user terminal that can communicate with in FDD wireless receiver 1 physical layer processing unit or the FDD wireless receiver physical layer processing unit among the RS carry out radio communication;
FDD wireless receiver physical layer processing unit: respectively with the FDD transceiver data link layer and the user terminal that can communicate with in FDD transmitting set 1 physical layer processing unit or the FDD transmitting set physical layer processing unit among the RS carry out radio communication;
FDD transceiver data link layer deals unit: after the data from FDD wireless receiver physical layer processing unit that will receive are made the data processing of FDD transceiver data link layer, be transmitted to the wire transmission processing unit.After the data from wire transmission processing unit unit that receive are made the data processing of FDD transceiver data link layer, be transmitted to FDD transmitting set physical layer processing unit.
6, according to claim 1,2 or 5 described wireless transfer communication system, it is characterized in that, described BS also provides the interface with user terminal communication, when the user terminal direct communication under BS and the RS covering, described BS is by adopting the chnnel coding different with other transmission data and modulation system or different transmitting power with lead code Preamble, frame control head FCH, descending mapping table DL-MAP and up mapping table UL-MAP information directly send to user terminal from this interface, initial ranging Ranging competition slot and bandwidth request competition slot to the sub-frame of uplink of BS, or range finding subchannel RangingSubchannel, user terminal adopts with the different chnnel coding of other transmission data and directly sends to BS by user terminal with modulation system or different transmitting powers, does not carry out transfer by RS.
7, a kind of method of the realization wireless transfer communication based on said system is characterized in that, comprising:
A, in the descending sub frame of BS physical layer frame structure 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 the physical layer frame structure of the FDD of RS wireless receiver, descending transfer district is set, be used to define rotor channel and the OFDMA symbol combination that RS receives the descending transfer district of BS, in the descending sub frame of the physical layer frame structure of the FDD of RS transmitting set, up transfer district is set, is used to define rotor channel and the OFDMA symbol combination that RS receives the up transfer district of BS;
B, the uplink and downlink physical layer frame based on the BS of described setting and RS between BS, RS and user terminal adopt the FDD mode to carry out wireless transfer communication.
8, the method for realization wireless transfer communication according to claim 7 is characterized in that, described steps A also comprises:
During the up transfer district of BS correspondence, the user terminal that belongs to BS is not arranged any transmission subchannel and OFDMA symbol combination, in during the descending transfer district of BS correspondence, the user terminal that belongs to RS is not arranged any transmission subchannel and OFDMA symbol combination, and the described uplink and downlink transfer district that is provided with in BS and RS selects to be provided with in each frame.
9, the method for realization wireless transfer communication according to claim 7 is characterized in that, described steps A also comprises:
When having at least two RS, these at least two RS share downlink or uplink transfer district by different subchannels and OFDMA symbol combination, the FDD transmitting set of different RS only sends the interim data of BS in corresponding subchannel and the OFDMA symbol combination in descending transfer district, in other subchannel and OFDMA symbol combination, do not arrange to send the interim data of BS, the FDD wireless receiver of different RS only receives the interim data of BS in corresponding subchannel and the OFDMA symbol combination in descending transfer district, do not arrange to receive the interim data of BS in other subchannel and OFDMA symbol combination.
10, the method for realization wireless transfer communication according to claim 7 is characterized in that, described steps A also comprises:
In the descending sub frame of the physical layer frame structure of BS, descending transfer broadcast sub-channels is set, is used to define downlink sub-channels and the OFDMA symbol combination that is broadcast to RS by BS;
In the descending sub frame of the physical layer frame structure of the FDD of RS wireless receiver, descending transfer broadcast sub-channels is set, is used to define the up subchannel of RS and the OFDMA symbol combination that receive the descending transfer broadcasting of BS;
The described descending transfer broadcast sub-channels that is provided with in BS and RS is selected to be provided with in each frame.
11, the method for realization wireless transfer communication according to claim 7 is characterized in that, described steps A also comprises:
Definition transfer range finding subchannel in the up transfer district of the sub-frame of uplink of the physical layer frame structure of BS, 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, and this transfer range finding subchannel also can be used as initial access range finding Ranging, Perodic ranging Ranging, the bandwidth request range finding subchannel of user terminal and uses;
Transfer range finding subchannel is set in the descending transfer district of the physical layer frame structure of the FDD of RS transmitting set, is used to define initial access range finding Ranging, the Perodic ranging Ranging of RS, the RS transfer range finding of bandwidth request sends subchannel and OFDMA symbol combination;
The time-frequency relation of the described transfer range finding subchannel that is provided with in BS and RS must be corresponding one by one, and strict synchronism is selected to be provided with in each frame.
12, the method for realization wireless transfer communication according to claim 7 is characterized in that, described steps A also comprises:
In the descending sub frame of the physical layer frame structure of the FDD transmitting set of the sub-frame of uplink of the physical layer frame structure of BS or RS, during the correspondence in descending sub frame head and up transfer district, the FDD transmitting set of BS receiver and different RS is shared the remainder of RS descending sub frame or BS sub-frame of uplink by different subchannels and OFDMA symbol combination;
In the sub-frame of uplink of the physical layer frame structure of the FDD wireless receiver of the descending sub frame of the physical layer frame structure of BS or RS, receive except that descending sub frame head, descending sub frame head and descending transfer district, the FDD wireless receiver of BS transmitter and different RS is by the remainder of the sub-frame of uplink of the FDD wireless receiver of different subchannels and shared BS descending sub frame of OFDMA symbol combination or RS.
13, the method for realization wireless transfer communication according to claim 7 is characterized in that, described steps A also comprises:
Definition descending sub frame head in the descending sub frame of the physical layer frame structure of BS, this descending sub frame head is the beginning 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 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, this descending sub frame head all is provided with in every frame.
14, according to claim 13ly realize wireless method for transfer, it is characterized in that described steps A also comprises based on terminal:
During user terminal direct communication under BS can't cover with RS, definition descending sub frame head in the descending sub frame of the physical layer frame structure of the FDD of RS transmitting set, this descending sub frame head is the beginning 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 indication RS 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, this descending sub frame head all is provided with in every frame.
15, the method for realization wireless transfer communication according to claim 14 is characterized in that, described steps A also comprises:
During user terminal direct communication under BS can't cover with RS, the descending sub frame head that defines in the descending sub frame of described physical layer frame structure at the FDD of RS transmitting set lags behind the descending sub frame head that defines in the descending sub frame of described physical layer frame structure at BS in time, and during the descending sub frame head of the FDD of RS transmitting set, BS can not arrange any reception subchannel and OFDMA symbol combination.
16, the method for realization wireless transfer communication according to claim 14 is characterized in that, described steps A also comprises:
When having at least two RS, during the descending sub frame head of the FDD of RS transmitting set, the descending sub frame of the physical layer frame structure of the FDD transmitting set of other RS is not arranged any transmission subchannel and OFDMA symbol combination,
Or,
When having at least two RS, if the descending sub frame head of the FDD transmitting set of different RS is overlapping in time, then must be overlapping fully, strict synchronism, and its descending sub frame head content must be identical.
17, the method for realization wireless transfer communication according to claim 14 is characterized in that, described steps A also comprises:
The descending sub frame head is set in the physical layer frame structure of the FDD of RS wireless receiver to be received, be used to define the subchannel and the OFDMA symbol combination of the descending sub frame head that receives BS, the time-frequency relation of the descending sub frame head of this descending sub frame head reception and described BS must be corresponding one by one, fully synchronously, this descending sub frame head receives subchannel and select setting in each frame.
18, the method for realization wireless transfer communication according to claim 7 is characterized in that, described steps A also comprises:
Definition range finding subchannel in the sub-frame of uplink of the physical layer frame structure of BS, definition are used for initial access range finding Ranging, the Perodic ranging Ranging of user terminal, the BS range finding of bandwidth request receives subchannel and OFDMA symbol combination;
During user terminal direct communication under BS can't cover with RS, definition range finding subchannel in the sub-frame of uplink of the physical layer frame structure of the FDD of RS wireless receiver, definition is used for initial access range finding Ranging, the Perodic ranging Ranging of user terminal, the RS range finding of bandwidth request receives subchannel and OFDMA symbol combination
The described range finding subchannel that defines in BS and RS all is provided with in every frame.
According to the method for each described realization wireless transfer communication of claim 7 to 18, it is characterized in that 19, described step B specifically 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, descending transfer broadcast sub-channels, transfer range finding subchannel, descending sub frame head, descending sub frame head receive, the range finding subchannel carries out the mutual of message, realize wireless transfer communication.
20, a kind of method based on OFDM access OFDMA-FDD realization wireless transfer communication is characterized in that, comprising:
By the downlink communication process of BS to user terminal:
C, BS send data to RS in the descending sub frame of BS, RS receives described data by the FDD wireless receiver of RS;
D, RS transmit the described data that receive by the descending sub frame of the FDD transmitting set of RS and give user terminal;
By the uplink communication process of user terminal to BS:
The interval uplink communication data that send of E, the user terminal time-frequency during the up transfer district correspondence of BS, RS receives this data;
F, RS send up transfer communication data to BS by the up transfer district of descending sub frame, and BS receives this up transfer communication data in sub-frame of uplink.
21, the method that realizes wireless transfer communication based on OFDMA-FDD according to claim 20 is characterized in that described step C specifically comprises:
C1, BS send lead code in the descending sub frame head of descending sub frame, the descending sub frame head of RS by the FDD wireless receiver of RS receives that subchannel receives this lead code and BS obtains synchronously;
C2, BS have sent described lead code in descending sub frame after, send FCH, DL-MAP and UL-MAP information, the descending sub frame head of RS by the FDD wireless receiver of RS receives subchannel and receives this FCH, DL-MAP and UL-MAP information, obtains subchannel and OFDMA symbol combination position and the using method profile information of descending and up each burst of BS;
C3, BS utilize the descending transfer broadcast transmission broadcast in the descending transfer district of descending sub frame, BS sends descending transfer communication data to RS in the descending transfer RS in the descending transfer district of descending sub frame, RS receives described broadcast by the descending transfer broadcast sub-channels of the FDD wireless receiver of RS, and RS receives described descending transfer communication data by the descending transfer district of the FDD wireless receiver of RS.
22, the method that realizes wireless transfer communication based on OFDMA-FDD according to claim 21 is characterized in that described step D specifically comprises:
D1, send lead code in the descending sub frame head of the descending sub frame of the FDD of RS transmitting set, user terminal receives this lead code and RS obtains synchronously;
The FDD transmitting set of D2, RS sends FCH, DL-MAP, UL-MAP information in descending sub frame, this FCH, DL-MAP, UL-MAP information can send to RS by BS, user terminal receives this FCH, DL-MAP, UL-MAP information, obtains subchannel and OFDMA symbol combination position and the using method profile information of descending and up each burst of RS;
The FDD transmitting set of D3, RS sends descending transfer communication data to user terminal in the time-frequency interval except that descending sub frame head, descending transfer district of descending sub frame, described transfer communication data send to the FDD transmitting set of RS by BS, and user terminal is from interval these the descending transfer communication data that receive of corresponding time-frequency;
Or
Lead code in the descending sub frame head of the descending sub frame of D4, user terminal reception BS, obtain synchronously with BS, FCH, DL-MAP and UL-MAP information in the descending sub frame head of the descending sub frame of user terminal reception BS, subchannel and OFDMA symbol combination position and the using method profile information of descending and up each burst of acquisition BS and RS;
The FDD transmitting set of D5, RS is in descending sub frame, send descending transfer communication data to user terminal in the interval of the time-frequency except that descending sub frame head, descending transfer district, described transfer communication data send to the FDD transmitting set of RS by BS, and user terminal is from interval these the descending transfer communication data that receive of corresponding time-frequency.
23, the method that realizes wireless transfer communication based on OFDMA-FDD according to claim 22 is characterized in that described step e specifically comprises:
After E1, user terminal receive described FCH, DL-MAP, UL-MAP information, subchannel and OFDMA symbol combination position and the using method profile information of descending and up each burst of the FDD transmitting set of acquisition RS, user terminal is in the sub-frame of uplink of the FDD of RS wireless receiver, the interval uplink communication data that send of time-frequency during the up transfer district correspondence of BS are to RS, and the FDD wireless receiver of RS is from interval these uplink communication data that receive of corresponding time-frequency;
Or
After E2, user terminal receive FCH, DL-MAP, the UL-MAP information of descending sub frame head of descending sub frame of described BS, obtain subchannel and OFDMA symbol combination and the using method profile information of descending and up each burst of BS and RS, user terminal is at the sub-frame of uplink of the FDD of RS wireless receiver, the interval uplink communication data that send of time-frequency during the up transfer district correspondence of BS are to RS, and the FDD wireless receiver of RS is from interval these uplink communication data that receive of corresponding time-frequency.
24, the method that realizes wireless transfer communication based on OFDMA-FDD according to claim 23 is characterized in that described step F specifically comprises:
The FDD wireless receiver of F1, RS receives FCH, DL-MAP and the UL-MAP information of descending sub frame head of the descending sub frame of BS, obtains subchannel and OFDMA symbol combination position and the using method profile information of descending and up each burst of BS;
The FDD transmitting set of F2, RS sends up transfer communication data to BS in the up transfer RS in the up transfer district of the descending sub frame of RS, these transfer communication data send to RS by BS, and BS receives these up transfer communication data in the up transfer RS in the up transfer district of sub-frame of uplink.
CN 200510115917 2005-09-30 2005-11-11 An access system and method for orthogonal frequency division multiplexing of wireless transfer communication Pending CN1964221A (en)

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CN 200510115917 CN1964221A (en) 2005-11-11 2005-11-11 An access system and method for orthogonal frequency division multiplexing of wireless transfer communication
CN2006800122322A CN101160997B (en) 2005-09-30 2006-09-29 Radio transfer communication system and its method
PCT/CN2006/002575 WO2007036161A1 (en) 2005-09-30 2006-09-29 Wireless relay communication system and 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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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010040253A1 (en) * 2008-10-10 2010-04-15 中兴通讯股份有限公司 Ofdma method and ofdm system
US8780769B2 (en) 2009-03-11 2014-07-15 Huawei Technologies Co., Ltd. Method, apparatus, and system for identifying different frame structures
CN106899396A (en) * 2007-06-18 2017-06-27 高通股份有限公司 The multiplexing of the detectable signal in ACK and CQI channels

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106899396A (en) * 2007-06-18 2017-06-27 高通股份有限公司 The multiplexing of the detectable signal in ACK and CQI channels
WO2010040253A1 (en) * 2008-10-10 2010-04-15 中兴通讯股份有限公司 Ofdma method and ofdm system
CN101729478B (en) * 2008-10-10 2012-07-04 中兴通讯股份有限公司 Method of multiple access of orthogonal frequency division multiplexing (OFDM) system
US8780769B2 (en) 2009-03-11 2014-07-15 Huawei Technologies Co., Ltd. Method, apparatus, and system for identifying different frame structures

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