CN1956354A - Radio relay communication system and implementing method - Google Patents
Radio relay communication system and implementing method Download PDFInfo
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- CN1956354A CN1956354A CN 200510114596 CN200510114596A CN1956354A CN 1956354 A CN1956354 A CN 1956354A CN 200510114596 CN200510114596 CN 200510114596 CN 200510114596 A CN200510114596 A CN 200510114596A CN 1956354 A CN1956354 A CN 1956354A
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Abstract
This invention relates to a radio transfer communication system and a realization method including: providing a simplified transfer communication mode, setting up a down transfer region and an up transfer region separately in the down sub-frame and the up sub-frame of a BS physical layer of the OFDMA system, setting up a down transfer region and an up transfer region separately in the down and up sub-frames of the RS physical layer structure to define symbol combination of the transfer sub-channels and OFDMA between the BS and RS, so that said BS and RS apply TDD and RDM modes to carry out radio transfer communication based on said up and down physical layer frames.
Description
Technical field
The present invention relates to wireless communication technology field, relate in particular to a kind of wireless transfer communication system and implementation method.
Background technology
IEEE 802.16 is first broadband wireless access standard, mainly contains two versions: the broadband mobile wireless that the broadband fixed wireless of 802.16 standards inserts version (802.16-2004) and 802.16 standards inserts version (802.16e).Wherein, two kinds of network elements have only been defined in the 802.16-2004 version, BS (base station) and SS (subscriber station); Equally, two kinds of network elements in the 802.16e version, have also only been defined, BS and MSS (mobile subscriber station).
At present, 802.16Multihop Relay SG (802.16 multi-hop transfer seminar) has proposed the notion of RS among the WiMAX (micro-wave access to global intercommunication) (changeing the station) again.The important effect of described RS is as the transfer between BS and SS/MSS, thereby enlarges the coverage of BS or the throughput of increase subscriber station.
In a channel (Channel) of OFDM (OFDM) or OFDMA (OFDM access) system (for example 802.16 systems), its OFDM or OFDMA symbol are made of subcarrier (Subcarrier), and the number of subcarrier has determined counting of FFT (fast Fourier transform).The subcarrier of forming a subchannel (Subchannel) can be adjacent, also can be non-conterminous, as shown in Figure 1, in Fig. 1, provided the adjacent example of subcarrier.
In the OFDMA system, dividing subcarrier by the kind that transmits data has several:
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 Subcarrjer).
In OFDM or OFDMA system, different users divides the FFT space of up link, 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).Wherein, divide subchannel and mainly contain 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 TDD (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 UL among Fig. 2).Under the tdd mode, descending sub frame DL is transmission earlier, follows by sub-frame of uplink UL.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 of up each burst.In the TDD system, TTG (transmission/reception change gap) and RTG (reception/transmission change gap) can be inserted in ascending-descending subframes when replacing, and allow BS finish transmitting-receiving alternately to reserve a period of time.
802.16OFDMA (or SOFDMA) frame structure difference under 802.16OFDMA under the FDD (or SOFDMA) frame structure and the TDD is that sub-frame of uplink sends on different frequencies with descending sub frame, need not to be provided with TTG and RTG.
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 implementation method, thereby can in the OFDMA system, realize transfer communication by RS, with the coverage of effective expansion BS based on TDD.
The objective of the invention is to be achieved through the following technical solutions:
The present invention also provides a kind of wireless transfer communication system, comprise base station BS, user terminal and terminal RS, described BS is provided with the interface of communicating by letter with RS, described RS is provided with the interface of communicating by letter with BS with user terminal, described user terminal then is provided with the interface of communicating by letter with RS, passes through described interface communication between described BS, RS and the user terminal.
Described BS also is provided with the interface with user terminal communication, and described user terminal is provided with the interface of communicating by letter with BS, and BS is by direct communication between described interface and the user terminal.
Adopt between described BS, RS and the user terminal to communicate with frequency, and described BS communicates by letter with user terminal or RS by the uplink and downlink subframe respectively, described RS communicates by letter with user terminal or BS by upper and lower subframe respectively.
Comprise TDD transmitting set physical layer element and TDD wireless receiver physical layer element in three entities of described BS, RS and user terminal respectively, described each TDD transmitting set physical layer element provides the communication interface of communicating by letter with the TDD wireless receiver physical layer element in other entities respectively, and described each TDD receiver physical layer element provides the communication interface of communicating by letter with the TDD transmitting set physical layer element in other entities respectively.
Also be respectively arranged with in described BS, RS and the user terminal with the local terminal entity in TDD transmitting set physical layer element and the TDD wireless receiver physical layer element TDD transceiver data-link layer unit that is connected communication, and, also be provided with among the described BS with the higher level wire transmission processing unit that is connected communication is set.
The present invention also provides a kind of implementation method of wireless transfer communication, 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 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 TDD to carry out wireless transfer communication.
Up transfer district in the physical layer frame structure of described BS and descending transfer district correspondence, and during the descending transfer district of BS and up transfer district correspondence, user terminal is not provided with and receives or send 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 a plurality of RS, different RS only receives or sends data in corresponding subchannel and the OFDMA symbol combination in descending 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 channel 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 RS, descending transfer broadcast reception channel is set, is 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 sends subchannel, be used to define initial access range finding, the Perodic ranging of RS, the BS 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 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, with indication 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 RS lags behind the descending frame head of BS in time, and during the descending frame head 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:
When having a plurality of RS, during the descending frame head of RS, other RS 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 different RS is overlapping fully in time, strict synchronism, and its content must be identical.
Described steps A also comprises:
The descending sub frame head is set in the downlink frame of the physical layer frame structure of RS receives, be used to define subchannel and the OFDMA symbol combination that RS receives the BS descending frame head, and the descending frame head that this descending frame head receives with 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 BS and RS the uplink distance measuring 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 up transfer district and descending transfer district, the descending sub frame of the sub-frame of uplink of BS and the descending sub frame of RS and BS and the sub-frame of uplink of RS can not overlap each other.
Described steps A comprises:
In the descending sub frame of the physical layer frame structure of BS or RS, except that the up transfer district of the descending transfer district of descending frame head, BS and RS, BS meets the remainder that descending sub frame is shared in combination with different RS by different subchannels and OFDMA.
Described steps A comprises:
In the sub-frame of uplink of the physical layer frame structure of BS or RS, except that the descending sub frame head receives, the up transfer district of the descending transfer district of RS and BS, BS meets the remainder that sub-frame of uplink is shared in combination with different RS by different subchannels and OFDMA.
Described steps A comprises:
The descending sub frame of BS or RS is to reserving transmissions/reception change gap TTG duration at least between the sub-frame of uplink of BS, and/or the sub-frame of uplink of BS or RS is to reservation reception/transmission change gap RTG duration at least between the descending sub frame of BS; And, for BS and user terminal can direct communication situation, during the TTG of BS, RS can not arrange any transmission subchannel and OFDMA symbol combination; During the RTG of BS, RS can not arrange any reception subchannel and OFDMA symbol combination.
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:
Up-downgoing transfer district, up-downgoing transfer broadcast sub-channels, descending sub frame head, the descending sub frame head that comprises in the uplink and downlink physical layer frame based on the RS of the BS that is provided with between BS, RS and user terminal receives and/or the range finding subchannel carries out the mutual of message, realizes 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 RS;
D, RS send the data set user terminal at the descending sub frame of RS;
By the uplink communication process of user terminal to BS:
E, by in the sub-frame of uplink of RS, sending upstream data by user terminal, and RS receives described data;
F, RS send up interim data in the up transfer of RS descending sub frame district, 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:
BS and RS be respectively at first symbol of the descending sub frame head of separately descending sub frame or send lead code, 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:
Described BS or RS also want transmit frame control head FCH, descending mapping table DL-MAP and up mapping table UL-MAP information, receive the RS of each information or user terminal is determined each burst according to each information time slot, 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 RS sub-frame of uplink.
Described step C also comprises:
When can direct communication between BS and the user terminal, BS adopts specific chnnel coding and modulation system with the broadcasting of descending sub frame head, or adopts and be higher than the transmitting power that sends 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 time slot, subchannel and/or 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 the descending sub frame 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;
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 defines the physical layer frame structure of BS and RS, thereby makes the present invention have the following advantages by introducing the mechanism that TDM combines with OFDMA:
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, effectively guarantee to communicate by letter at the same frequency of TDD mode between RS and BS, MS/SS;
4, effectively avoid following several interference:
" RS is to SS/MS
RS", " RS is to SS/MS
BS" and " BS is to SS/MS
RS" interference;
" SS/MS
RSTo RS ", " SS/MS
BSTo RS " and " SS/MS
RSTo BS " interference;
" SS/MS
BSTo SS/MS
RS" and " SS/MS
RSTo SS/MS
BS" interference;
The interference of " BS is to RS " and " RS is to BS ".
Description of drawings
Fig. 1 is the frequency domain schematic diagram of OFDMA symbol;
Fig. 2 is the OFDMA frame structure schematic diagram under the TDD;
Fig. 3 is an ofdma communication system model schematic diagram one;
Fig. 4 is an ofdma communication system model schematic diagram two;
Fig. 5 is the concrete structure schematic diagram of Fig. 4;
Fig. 6 is the co-channel interference pattern diagram;
Fig. 7 is the physical layer frame structure schematic diagram one of BS and RS;
Fig. 8 is the physical layer frame structure schematic diagram two of BS and RS;
Fig. 9 is the physical layer frame structure schematic diagram three of BS and RS;
Figure 10 is the physical layer frame structure schematic diagram four of BS and RS.
Embodiment
Core of the present invention is by introducing the mechanism that TDM combines with OFDMA, the physical layer frame structure of definition BS and RS.
Among the present invention, the structure of transfer Modular Communications System mainly comprises two kinds, and respectively as shown in Figure 3 and Figure 4, a kind of is senior transfer Modular Communications System, and is another kind of for simplifying the transfer Modular Communications System, will describe two system models respectively below.
(1) the senior transfer Modular Communications System model between RS and BS, MS/SS as shown in Figure 3, this is a kind of common model of communication system, wherein, adopt the TDD/TDM/OFDMA mode communicating by letter between RS and BS, MS/SS with under the frequency, MS/SS carries out wireless transfer by RS and inserts BS, and RS inserts BS as a MS/SS.
In Fig. 3, (1) DL
BSBe the descending sub frame of the physical layer frame of BS, by BS to SS/MS
BSOr RS; (2) 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; (3) DL
RSBe the descending sub frame of the physical layer frame of RS, by BS to SS/MS
RSOr RS; (4) 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.
(2) the simplification transfer Modular Communications System model of RS and BS, MS/SS as shown in Figure 4 and Figure 5, this transfer pattern is a kind of model of communication system provided by the invention, wherein, adopt the TDD/TDM/OFDMA mode communicating by letter with under the frequency between RS and BS, MS/SS, RS inserts BS as a MS/SS.
This comprises the transfer communication system of the simplification transfer pattern of BS, RS and SS/MS, described BS is provided with the interface with RS and user terminal communication, described RS is provided with the interface of communicating by letter with BS with user terminal, described user terminal then is respectively arranged with the interface of communicating by letter with BS with RS, pass through described interface communication between described BS, RS and the user terminal, as shown in Figure 5:
Wherein, described 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;
TDD transceiver: be used for carrying out same frequency (as f1) radio communication in the TDD mode, form, be respectively by TDD transmitting set physical layer element, TDD wireless receiver physical layer element and TDD transceiver data-link layer unit with RS or SS/MS:
TDD transmitting set physical layer element: respectively with TDD transceiver data link layer and RS that can communicate with or SS/MS in the wireless receiver physical layer element carry out same frequency (as f1) 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;
TDD wireless receiver physical layer element: respectively with TDD transceiver data link layer and RS that can communicate with or SS/MS in the transmitting set physical layer element carry out same frequency (as f1) radio communication;
TDD transceiver data-link layer unit: to data from TDD wireless receiver physical layer element or wire transmission unit, after making the data processing of TDD transceiver data link layer, be transmitted to wire transmission unit or TDD transmitting set physical layer element.
Described RS comprises:
TDD transceiver: be used for carrying out same frequency (as f1) radio communication in the TDD mode, form by TDD transmitting set physical layer element, TDD wireless receiver physical layer element and TDD transceiver data-link layer unit with BS or SS/MS.
TDD transmitting set physical layer element: respectively with TDD transceiver data link layer and BS that can communicate with or SS/MS in the wireless receiver physical layer element carry out same frequency (as f1) radio communication;
TDD wireless receiver physical layer element: respectively with TDD transceiver data link layer and BS that can communicate with or SS/MS in the transmitting set physical layer element carry out same frequency (as f1) radio communication;
TDD transceiver data-link layer unit: to data from TDD wireless receiver physical layer element, make the data processing of TDD transceiver data link layer after, be transmitted to TDD transmitting set physical layer element.
Described SS/MS comprises:
TDD transceiver: be used for carrying out same frequency (as f1) radio communication in the TDD mode, form by TDD transmitting set physical layer element, TDD wireless receiver physical layer element and TDD transceiver data-link layer unit with RS or BS.
TDD transmitting set physical layer element: carry out same frequency (as f1) radio communication with TDD transceiver data link layer and the RS that can communicate with or BS wireless receiver physical layer element respectively; 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;
TDD wireless receiver physical layer element: respectively with TDD transceiver data link layer and RS that can communicate with or BS in the transmitting set physical layer element carry out same frequency (as f1) radio communication;
TDD transceiver data-link layer unit: to from TDD wireless receiver physical layer element or user's data, make the data processing of TDD transceiver data link layer after, be transmitted to user or TDD transmitting set physical layer element.
As can be seen, in Fig. 5, each TDD transmitting set physical layer element described in BS, RS and the SS/MS provides the communication interface of communicating by letter with the TDD wireless receiver physical layer element in other entities respectively, and described each TDD receiver physical layer element provides the communication interface of communicating by letter with the TDD transmitting set physical layer element in other entities respectively.
In Fig. 4, (1) DL
BSBe the descending sub frame of the physical layer frame of BS, by BS to SS/MS
BSOr RS; (2) 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; (3) DL
RSBe the descending sub frame of the physical layer frame of RS, by BS to SS/MS
RSOr RS; (4) UL
RSFor the sub-frame of uplink of the physical layer frame of RS, by SS/MS
RSOr RS is to BS.
Wherein, DL
BSDescending sub frame head broadcasting, as Preamble (lead code), FCH (frame control head), DL-MAP (descending mapping table), UL-MAP (up mapping table), 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.
Based on above-mentioned each subframe, BS just can and RS between communicate, and then by communicating by letter after the RS transfer with between the SS/MS; Simultaneously, the information that SS/MS can also be sent to BS sends by the RS transfer, thereby effectively improves the coverage of wireless communication system.
In addition, realization of the present invention also needs to consider because the network system of tdd mode adopts the phase mutual interference with the existing 4 kinds of situations shown in Fig. 5 (a)-(d) of frequently communicating by letter.Among the figure, TX represents sending module, and RX represents receiver module.
Based on above-mentioned transfer communication demand, for making RS pass through between BS and SS/MS, to realize the transfer communication function, just need to define corresponding physical layer frame structure, simultaneously, for guaranteeing the reliability of communication, also need reasonably to carry out the definition of frame structure, have only the physical layer frame structure that has defined rational BS and RS can make the transfer communication based on RS realize smoothly, and effectively avoid issuable interference in the communication process according to the transfer communication demand.
As can be seen, the definition of the physical layer frame structure of BS and RS is the key that realizes based on the transfer communication of RS.For this reason, the demand at the transmission frame in above-mentioned BS and the RS transfer communication process will be elaborated to the definition of each frame structure below.
For realizing the transfer communication function of RS between BS and SS/MS, at first need be specially at the uplink and downlink subframe structure of the physical layer that defines BS and RS:
1, at the descending sub frame DL of the physical layer frame structure of BS
BSThe middle TDM technology that adopts increases DLRelay 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 DLRelay Zone by different subchannels and OFDMA symbol combination;
2, at the sub-frame of uplink UL of the physical layer frame structure of RS
RSThe middle TDM technology that adopts increases DLRelay 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 DLRelay Zone by different subchannels and OFDMA symbol combination, 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;
3, at the sub-frame of uplink UL of the physical layer frame structure of BS
BSThe middle TDM technology that adopts increases ULRelay 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, at the descending sub frame DL of the physical layer frame structure of RS
RSThe middle TDM technology that adopts increases ULRelay 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 ULRelay Zone by different subchannels and OFDMA symbol combination, 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;
Need to prove, during the DL of BS Relay Zone and UL Relay Zone correspondence, SS/MS
BSAnd SS/MS
RSDo not arrange any reception or send subchannel and OFDMA symbol combination, avoid SS/MS
BSTo RS and SS/MS
RSInterference to BS.
For mutual broadcast service information between BS and the RS, also need carry out in the transfer district in the frame structure of BS and RS among the present invention as giving a definition:
1, at the descending sub frame DL of the physical layer frame structure of BS
BSDL Relay Zone in open up DLRelay 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, broadcast DCD (down channel descriptor), UCD (upstream channel descriptor), FPC (fast power control), CLK_CMP (clock relatively) broadcasting packet of 802.16 standard definitions;
2, at the sub-frame of uplink UL of the physical layer frame structure of RS
RSDL Relay Zone in open up DLRelay 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.
Inserting BS smoothly for ease of SS/MSS also need also need carry out in the transfer district in the frame structure of BS and RS as giving a definition described:
1, at the sub-frame of uplink UL of the physical layer frame structure of BS
BSUL Relay Zone in definition RelayRanging 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 SS/MSS
BSInitial access range finding Ranging, Perodic ranging Ranging, bandwidth request range finding subchannel use;
2, at the descending sub frame DL of the physical layer frame structure of RS
RSDL Relay Zone in definition 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;
Wherein, the time-frequency of the Relay Ranging TXSubchannel of the Relay Ranging Subchannel of BS and RS relation must be corresponding one by one, strict synchronism;
In the descending sub frame of the physical layer frame structure of BS or RS, except that the UL Relay Zone of the DL Relay Zone of DL Header (descending frame head), BS and RS, BS and different RS share the remainder of descending sub frame by different subchannels and OFDMA symbol combination, avoid RS to SS/MS
RS, RS is to SS/MS
BSArrive SS/MS with BS
RSInterference;
In the sub-frame of uplink of the physical layer frame structure of BS or RS, except that the UL Relay Zone of the DLRelay Zone of DL Header RX, RS and BS, BS and different RS share the remainder of sub-frame of uplink by different subchannels and OFDMA symbol combination, avoid SS/MS
RSTo RS, SS/MS
BSTo RS and SS/MS
RSInterference to BS.
Among the present invention,, also need the physical layer frame structure of BS and RS is carried out as giving a definition for realizing transfer communication based on RS:
1, at the descending sub frame DL of the physical layer frame structure of BS
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.Comprise preamble, FCH, DL-MAP, UL-MAP in former 802.16OFDMA (or SOFDMA) frame, SS/MS
BS, RS and BS keep receiving frame synchronous;
2, at the descending sub frame DL of the physical layer frame structure of RS
RSMiddle 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 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.Comprise preamble, FCH, DL-MAP, UL-MAP in former 802.16OFDMA (or SOFDMA) frame, SS/MS
RSKeep receiving frame synchronous with RS;
Wherein, the DL Header of RS only is applied to senior transfer pattern shown in Figure 3, and lags behind the DL Header of BS in time; During the DL of RS Header, the descending sub frame (DL of BS
BS) can not arrange any transmission subchannel and OFDMA symbol combination, avoid BS to SS/MS
RSInterference;
During the DL of RS Header, the descending sub frame DL of the physical layer frame structure of other RS
RSCan not arrange any transmission subchannel and OFDMA symbol combination, avoid RS to SS/MS
RSInterference; In particular cases, if the DL Header of different RS is overlapping in time, then must be overlapping fully, strict synchronism, and its content must be identical, avoids RS to SS/MS
RSInterference;
3, at the sub-frame of uplink UL of the physical layer frame structure of RS
RSIn definition DL Header RX (receptions of descending sub frame head), be used to define subchannel and the OFDMA symbol combination of the DL Header of reception BS;
In above-mentioned frame structure, the time-frequency of the DL Header RX of the DL Header of BS and RS relation must corresponding one by one, strict synchronism.
Among the present invention,, also need the physical layer frame structure of BS and RS is carried out as giving a definition for realizing transfer communication based on RS:
1, at the sub-frame of uplink UL of the physical layer frame structure of BS
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, at the sub-frame of uplink UL of the physical layer frame structure of RS
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.
In the subframe structure of above-mentioned definition, except that DL Relay Zone and UL Relay Zone, the descending sub frame of BS must not with the sub-frame of uplink overlaid of RS, the sub-frame of uplink of BS also must not with the descending sub frame overlaid of RS, avoid SS/MS
BSTo SS/MS
RSAnd SS/MS
RSTo SS/MS
BSAnd the interference of BS to RS and RS to BS;
Simultaneously, the descending sub frame DL of BS
BSSub-frame of uplink UL to BS
BSBetween reserve TTG (transmission/reception change gap) duration at least; The sub-frame of uplink UL of BS
BSDescending sub frame DL to BS
BSBetween reserve RTG (reception/transmission change gap) duration at least; The descending sub frame DL of RS
RSSub-frame of uplink UL to RS
RSBetween reserve the TTG duration at least; The sub-frame of uplink UL of RS
RSDescending sub frame DL to RS
RSBetween reserve the RTG duration at least; For simplifying the transfer pattern, during the TTG of BS, RS can not arrange any transmission subchannel and OFDMA symbol combination; During the RTG of BS, RS can not arrange any reception subchannel and OFDMA symbol combination.
And except that DL Header, Ranging Subchannel, the not necessarily every frame of the subchannel of above-mentioned definition and OFDMA symbol combination or Zone all must exist.
In OFDMA or SOFDMA system, the subframe structure based on above-mentioned definition between BS, RS and the SS/MSS communicates, and just can realize corresponding transfer communication, and can guarantee the excellent communications effect, and various transfer communication demand.
For ease of understanding the present invention, specific implementation of the present invention is elaborated below in conjunction with concrete application example.
Physical layer frame structure embodiment such as Fig. 6 or shown in Figure 7 of first kind of BS provided by the invention and RS, Fig. 6 are the schematic diagram under the senior transfer pattern, and Fig. 7 is for simplifying the schematic diagram under the transfer pattern.
Among the figure, NULL or blank parts part for not arranging any reception or transmission.Wherein, BS descending sub frame DL
BSWith RS descending sub frame DL
RSIn DL Header be the Preamble of BS among Fig. 6 and Fig. 7 and DL-MAP, UL-MAP zone; RS sub-frame of uplink UL
RSIn DL Header RX be the Preamble of RS among Fig. 6 and Fig. 7 and DL-MAP, UL-MAP zone.
The DL Relay Zone of BS (be DL Relay broadcast, DL Relay R# 1, #2 ... part) is arranged in BS descending sub frame (DL
BS) DL Header after, the UL Relay Zone of BS (be UL Relay R# 1, #2 ... with RRS TX part) be arranged in BS descending sub frame DL
BSThe beginning part.During the DL of BS Relay Zone and UL Relay Zone correspondence, MS does not arrange any reception or sends subchannel and OFDMA symbol combination.
For simplifying the transfer pattern, during the TTG of BS, RS can not arrange any transmission subchannel and OFDMA symbol combination; During the RTG of BS, RS can not arrange any reception 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 physical layer frame structure embodiment of another BS and RS, and as Fig. 8 and shown in Figure 9, wherein, Fig. 8 is the physical layer frame structure under the senior transfer pattern, and Fig. 9 is for simplifying the physical layer frame structure under the transfer pattern.
The RRS TX of the RRS of BS and RS occurs every frame, as appears at N-1 frame (FrameN-1), N+1 frame (FrameN+1), N+3 frame (FrameN+3) ... descending sub frame DL
RSIn.
The UL Relay Zone of the DL Relay Zone of BS and BS can not be arranged in same frame.For example, the DL Relay Zone of BS is arranged in the descending sub frame DL of N frame (FrameN)
BSThe end, then the DL Relay Zone of RS is arranged in the sub-frame of uplink UL of N frame (FrameN)
RSFirst of.The UL Relay Zone of BS is arranged in the sub-frame of uplink UL of N+1 frame (FrameN+1)
BSFirst of, the UL Relay Zone of RS is arranged in the descending sub frame DL of N+1 frame (FrameN+1)
BSThe end.During the DL of BS Relay Zone and UL Relay Zone correspondence, MS does not arrange any reception or sends subchannel and OFDMA symbol combination.
For simplifying the transfer pattern, during the TTG of BS, RS can not arrange any transmission subchannel and OFDMA symbol combination; During the RTG of BS, RS can not arrange any reception subchannel and OFDMA symbol combination.
Below with the present invention will be described in conjunction with concrete communication process application example again.
Corresponding transfer flow process is as follows among the present invention:
(1), descending transfer Downlink relay
Described descending transfer is divided into two stages, and the phase I is: by the communication process of BS to RS, second stage is: by the communication process of RS to SS/MS; Wherein, for the phase I, the transfer processing mode is identical accordingly to senior transfer pattern shown in Figure 5 and simplification transfer pattern at Fig. 3, and for second stage, then in senior transfer pattern with simplify that corresponding transfer processing mode but has nothing in common with each other in the transfer pattern, below will be respectively the processing in two stages be described.
Wherein, the phase I (processing procedure of BS-＞RS) comprises:
1, BS is at descending sub frame DL
BSFirst symbol symbol in " DL Header " or time slot send lead code preamble;
2, RS# 1 is by RS sub-frame of uplink UL
RSIn " DL Header RX " receive BS descending sub frame DL
BSLead code preamble in " DL Header " and BS obtain synchronously;
3, BS is at descending sub frame DL
BSSend FCH, DL-MAP, UL-MAP in after " DL Header " preamble;
4, RS# 1 is by RS sub-frame of uplink UL
RSIn " DL Header RX " receive descending sub frame DL
BSThe FCH of " DL Header ", DL-MAP, UL-MAP, time slot, subchannel and/or OFDMA character position and using method (profile) information of acquisition descending and up each burst of BS (burst);
5, BS utilizes descending sub frame DL
BS" the DL Relay broadcast " of " DL Relay Zone " sends broadcast message;
6, BS is at descending sub frame DL
BSSend descending transfer communication data traffic data among " the DL Relay RS# 1 " of " DL Relay Zone " to RS# 1;
7, RS# 1 is by RS sub-frame of uplink UL
RSIn " DL RB " receive BS descending sub frame (DL
BS) broadcast message among " the DL Relay broadcast " of " DL Relay Zone ", wherein can comprise the message that needs RS# 1 transfer broadcasting;
8, RS# 1 is by RS sub-frame of uplink UL
RSIn " DL Relay Zone " receive BS descending sub frame DL
BSDescending transfer communication data trafficdata in " the DL Relay RS# 1 " of " DL Relay Zone ".
Described second stage (RS-＞MS/SS) comprising:
(1) for the processing of senior transfer pattern
1, RS# 1 is at descending sub frame DL
RSFirst symbol symbol in " DL Header " or time slot send lead code preamble;
2, MS/SS receives RS# 1 descending sub frame DL
RSLead code preamble and RS# 1 in " DL Header " obtain synchronously
3, RS# 1 is at descending sub frame DL
RSSend FCH, DL-MAP, UL-MAP (UL-MAP can send to RS# 1 by BS in the step 6 of phase I for the FCH of RS# 1, DL-MAP) in after " DL Header " preamble;
4, MS/SS receives descending sub frame DL
RSThe FCH of " DL Header ", DL-MAP, UL-MAP obtains time slot, subchannel and/or OFDMA character position and using method (profile) information of descending and up each burst of RS# 1;
5, RS# 1 is at descending sub frame DL
RSIn, in the time-frequency interval except that DL Header, DL Relay Zone, send descending transfer communication data traffic data (in step 6, sending to RS# 1 by BS) and give MS/SS;
6, MS/SS is from the interval RS# 1 descending sub frame DL that receives of corresponding time-frequency
RSIn descending transfer communication data traffic data.
(2) for the processing of simplifying the transfer pattern
1, MS/SS receives BS descending sub frame DL
BSLead code preamble in " DL Header " and BS obtain synchronously;
2, MS/SS receives BS descending sub frame DL
BSThe FCH of " DL Header ", DL-MAP, UL-MAP obtains BS and RS# 1 is descending and the time slot of up each burst, subchannel and/or OFDMA character position and using method (profile) information;
3, RS# 1 is at descending sub frame DL
RSIn, in the time-frequency interval except that DL Header, DL Relay Zone, send descending transfer communication data traffic data (in step 6, sending to RS# 1 by BS) and give MS/SS;
4, MS/SS is from the interval RS# 1 descending sub frame DL that receives of corresponding time-frequency
RSIn descending transfer communication data traffic data.
(2), up transfer Uplink relay
Described up transfer branch is similarly two stages, and the phase I is: by the communication process of SS/MS to RS, second stage is: by the communication process of RS to BS; Wherein, for the phase I, at Fig. 3 to senior transfer pattern shown in Figure 5 with simplify that corresponding transfer processing mode has nothing in common with each other in the transfer pattern, and for second stage, then in senior transfer pattern with to simplify in the transfer pattern corresponding transfer processing mode identical, below will be respectively the processing in two stages be described.
Wherein, the phase I (processing procedure of MS/SS-＞RS) comprises:
(1) for the processing of senior transfer pattern
1, MS/SS receives RS# 1 descending sub frame DL
RSThe FCH of " DL Header ", DL-MAP, UL-MAP obtains subchannel and OFDMA character position and using method (profile) information of descending and up each burst of RS# 1;
2, MS/SS is at RS sub-frame of uplink UL
RSIn, at the time slot except that DL Header RX, UL Relay Zone, send uplink communication data traffic data to RS# 1;
3, RS# 1 receives MS/SS sub-frame of uplink UL from corresponding time slot
RSIn uplink communication data trafficdata.
(2) for the processing of simplifying the transfer pattern
1, MS/SS receives BS descending sub frame DL
BSFCH, DL-MAP, the UL-MAP of " DL Header " obtain 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 RS sub-frame of uplink UL
RSIn, at the time slot except that DL Header RX, UL Relay Zone, send uplink communication data traffic data to RS# 1;
3, RS# 1 receives MS/SS sub-frame of uplink UL from corresponding time slot
RSIn uplink communication data trafficdata.
Described second stage (processing of RS-＞BS) comprises:
1, RS# 1 receives BS descending sub frame DL
BSThe FCH of " DL Header ", DL-MAP, UL-MAP obtains subchannel and OFDMA character position and using method (profile) information of descending and up each burst of BS;
2, RS# 1 is at RS descending sub frame DL
RSSend up transfer communication data traffic data (in step 2, sending to RS# 1 by BS) among " the UL Relay RS# 1 " of " UL Relay Zone " and give BS;
3, BS is at sub-frame of uplink UL
BSUp transfer communication data traffic data among " the UL Relay RS# 1 " of " UL Relay Zone " in the receiving step 2.
In sum, the present invention defines the physical layer frame structure of BS and RS, thereby makes the present invention have the following advantages by introducing the mechanism that TDM combines with OFDMA:
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, effectively guarantee to communicate by letter at the same frequency of TDD mode between RS and BS, MS/SS;
4, the interference of effectively avoiding plurality of application scenes to exist.
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 (29)
1, a kind of wireless transfer communication system, it is characterized in that, comprise base station BS, user terminal and terminal RS, described BS is provided with the interface of communicating by letter with RS, described RS is provided with the interface of communicating by letter with BS with user terminal, described user terminal then is provided with the interface of communicating by letter with RS, passes through described interface communication between described BS, RS and the user terminal.
2, wireless transfer communication system according to claim 1, it is characterized in that, described BS also is provided with the interface with user terminal communication, and described user terminal is provided with the interface of communicating by letter with BS, and BS is by direct communication between described interface and the user terminal.
3, wireless transfer communication system according to claim 2, it is characterized in that, adopt between described BS, RS and the user terminal and communicate with frequency, and described BS communicates by letter with user terminal or RS by the uplink and downlink subframe respectively, and described RS communicates by letter with user terminal or BS by upper and lower subframe respectively.
4, according to claim 1,2 or 3 described wireless transfer communication system, it is characterized in that, comprise TDD transmitting set physical layer element and TDD wireless receiver physical layer element in three entities of described BS, RS and user terminal respectively, described each TDD transmitting set physical layer element provides the communication interface of communicating by letter with the TDD wireless receiver physical layer element in other entities respectively, and described each TDD receiver physical layer element provides the communication interface of communicating by letter with the TDD transmitting set physical layer element in other entities respectively.
5, wireless transfer communication system according to claim 4, it is characterized in that, also be respectively arranged with in described BS, RS and the user terminal with the local terminal entity in TDD transmitting set physical layer element and the TDD wireless receiver physical layer element TDD transceiver data-link layer unit that is connected communication, and, also be provided with among the described BS with the higher level wire transmission processing unit that is connected communication is set.
6, a kind of implementation method of 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 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 TDD to carry out wireless transfer communication.
7, method according to claim 6, it is characterized in that, up transfer district in the physical layer frame structure of described BS and descending transfer district correspondence, and, during the descending transfer district of BS and up transfer district correspondence, user terminal is not provided with and receives or send subchannel and OFDMA symbol combination.
8, method according to claim 6, 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 a plurality of RS, different RS only receives or sends data in corresponding subchannel and the OFDMA symbol combination in descending transfer district.
9, method according to claim 6 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 channel 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 RS, descending transfer broadcast reception channel is set, is 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.
10, method according to claim 6 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 sends subchannel, be used to define initial access range finding, the Perodic ranging of RS, the BS transfer range finding of bandwidth request sends subchannel and OFDMA symbol combination.
11, method according to claim 10 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.
12, method according to claim 6 is characterized in that, described steps A also comprises:
At BS, or in the physical layer frame structure downlink frame of BS and RS 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, with indication 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 RS lags behind the descending frame head of BS in time, and during the descending frame head of RS, BS can not be provided with descending sub frame and send subchannel and OFDMA symbol combination.
13, according to claim 12ly 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.
14, according to claim 12ly realize wireless method for transfer, it is characterized in that described steps A also comprises based on terminal:
When having a plurality of RS, during the descending frame head of RS, other RS 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 different RS is overlapping fully in time, strict synchronism, and its content must be identical.
15, method according to claim 12 is characterized in that, described steps A also comprises:
The descending sub frame head is set in the downlink frame of the physical layer frame structure of RS receives, be used to define subchannel and the OFDMA symbol combination that RS receives the BS descending frame head, and the descending frame head that this descending frame head receives with BS needs overlapping and strict synchronism fully.
16, method according to claim 6 is characterized in that, described steps A also comprises:
In the sub-frame of uplink of the physical layer frame structure of BS and RS the uplink distance measuring 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.
17, according to each described method of claim 6 to 16, it is characterized in that described steps A also comprises:
Except that up transfer district and descending transfer district, the descending sub frame of the sub-frame of uplink of BS and the descending sub frame of RS and BS and the sub-frame of uplink of RS can not overlap each other.
18, according to each described method of claim 6 to 16, it is characterized in that described steps A comprises:
In the descending sub frame of the physical layer frame structure of BS or RS, except that the up transfer district of the descending transfer district of descending frame head, BS and RS, BS meets the remainder that descending sub frame is shared in combination with different RS by different subchannels and OFDMA.
19, according to each described method of claim 6 to 16, it is characterized in that described steps A comprises:
In the sub-frame of uplink of the physical layer frame structure of BS or RS, except that the descending sub frame head receives, the up transfer district of the descending transfer district of RS and BS, BS meets the remainder that sub-frame of uplink is shared in combination with different RS by different subchannels and OFDMA.
20, according to each described method of claim 6 to 16, it is characterized in that described steps A comprises:
The descending sub frame of BS or RS is to reserving transmissions/reception change gap TTG duration at least between the sub-frame of uplink of BS, and/or the sub-frame of uplink of BS or RS is to reservation reception/transmission change gap RTG duration at least between the descending sub frame of BS; And, for BS and user terminal can direct communication situation, during the TTG of BS, RS can not arrange any transmission subchannel and OFDMA symbol combination; During the RTG of BS, RS can not arrange any reception subchannel and OFDMA symbol combination.
21, according to each described method of claim 6 to 16, 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.
22, according to each described method of claim 6 to 16, 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.
23, 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 RS;
D, RS send the data set user terminal at the descending sub frame of RS;
By the uplink communication process of user terminal to BS:
E, by in the sub-frame of uplink of RS, sending upstream data by user terminal, and RS receives described data;
F, RS send up interim data in the up transfer of RS descending sub frame district, and BS receives described interim data in the up transfer district of the sub-frame of uplink of BS.
24, method according to claim 23 is characterized in that, is describedly also comprised to the downlink communication process of user terminal by BS:
BS and RS be respectively at first symbol of the descending sub frame head of separately descending sub frame or send lead code, and it is synchronous to receive the RS of lead code or user terminal and BS or RS.
25, method according to claim 24 is characterized in that, after sending described lead code, also comprises:
Described BS or RS also want transmit frame control head FCH, descending mapping table DL-MAP and up mapping table UL-MAP information, receive the RS of each information or user terminal is determined each burst according to each information time slot, subchannel and/or character position and using method information.
26, according to claim 23,24 or 25 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 RS sub-frame of uplink.
27, according to claim 23,24 or 25 described methods, it is characterized in that described step C also comprises:
When can direct communication between BS and the user terminal, BS adopts specific chnnel coding and modulation system with the broadcasting of descending sub frame head, or adopts and be higher than the transmitting power that sends data, directly issues user terminal by BS.
28, method according to claim 23 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 time slot, subchannel and/or character position and the using method information of each burst of BS and RS.
29, method according to claim 23 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 the descending sub frame 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;
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 200510114596 CN1956354A (en) | 2005-10-26 | 2005-10-26 | Radio relay communication system and implementing method |
| EP06791161.0A EP1931155B1 (en) | 2005-09-30 | 2006-09-29 | Wireless relay communication system and method |
| 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 |
| 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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| CN 200510114596 CN1956354A (en) | 2005-10-26 | 2005-10-26 | Radio relay communication system and implementing method |
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| CN107395543A (en) * | 2009-11-03 | 2017-11-24 | 英特尔公司 | For supporting the frame structure of big delay extension deployment scenario |
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