CN1941665A - Method for realizing radio transit based on transfer station - Google Patents
Method for realizing radio transit based on transfer station Download PDFInfo
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- CN1941665A CN1941665A CN 200510106291 CN200510106291A CN1941665A CN 1941665 A CN1941665 A CN 1941665A CN 200510106291 CN200510106291 CN 200510106291 CN 200510106291 A CN200510106291 A CN 200510106291A CN 1941665 A CN1941665 A CN 1941665A
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Abstract
The invention is concerned with a method for wireless transfer of transfer station. It defines upper and down link transfer sections, upper and down link disturbing timeslot, and BS and RS physics layer frame structure of timeslot to those based the transfer corresponding requirement to RS, so the wireless transfer communications between BS and RS based on the defined frame result. MS/SS meet BS in wireless transfer by RS to keep the same frequency communications in type of TDD among RS, BS and MS /SS. At the same time, this invention can avoid the corresponding interfering from RS to SS/MSBS, from BS to SS/MSRS, from SS/MSBS to RS, from SS/MSRS to BS, from SS/MSBS to SS/MSRS, from SS/MSRS to SS/MSBS, from RS to RS, from BS to BS and from RS to BS, to keep the better transfer communications.
Description
Technical field
The present invention relates to communication technical field, relate in particular in a kind of communication system and realize wireless method for transfer based on terminal.
Background technology
IEEE 802.16 is the broadband wireless access standard, in 802.16 standards, for authorizing frequency range, duplex mode can be FDD (frequency division duplex or duplexing, Frequency Division Duplexing (FDD)) and TDD (time division duplex or duplexing, time division duplex).
The subscriber station of FDD mode (SS) can be half-duplex FDD, and for the frequency range of exempting to authorize, duplex mode can only be TDD.
Be illustrated in figure 1 as 802.16 OFDM (the Orthogonal Frequency DivisionMultiplex under the TDD, OFDM) or SC (Single Carrier, single carrier) frame structure, the multi-access mode of TDD mode is descending to have only TDM (Time Division Multiplex, time division multiplexing), last provisional capital is to adopt TDMA (Time Division Multiplex Access, time division multiplexing inserts).Data on physical channel are with the form transmission of frame (Frame).Every frame comprises descending sub frame (DLsubframe) and sub-frame of uplink (UL subframe).
Under tdd mode, descending sub frame is transmission earlier, follows by sub-frame of uplink.A descending sub frame has only a down physical layer protocol Data Unit (DL PHY PDU), and sub-frame of uplink comprises time slot in the following order: Initial R anging (addressing) competition slot (Contention slot for initialranging), bandwidth request competition slot (Contention slot for BW requests) and one or more upstream physical layer protocol Data Unit (UL PHY PDU), each UL PHY PDU is from different subscriber stations (SS).
It is a lead code (preamble) that descending PHY PDU begins, and it is synchronous to be used for physics; Be frame control head (frame control header afterwards; FCH) burst (burst), FCH comprises frame prefix (DL_Frame_Prefix; DLFP), be used for specifying profikle (parameter set) and the length thereof that follows the one or more descending Burst after FCH closely.
DL-MAP (Downlink-map, descending mapping table) will be first MAC PDU (mac-layer protocol data cell) that follows in the FCH back if message sends at present frame.UL-MAP (Uplink-map, up mapping table) message is immediately following the DL-MAP or the DLFP back that are sending.
If DCD (Downlink channel descriptor, down channel descriptor) and UCD (uplink channel descriptor, upstream channel descriptor) message send in frame, two message will be immediately following in DL-MAP and UL-MAP back.DL-MAP, UL-MAP, DCD and UCD will be 1
#DLBurst sends.Position and the profile of other burst are specified by DL-MAP.If the DLPHY burst of OFDM (Orthogonal Frequency Division Multiplex, OFDM) physical layer, in order to obtain the integral multiple of OFDM symbol, effectively the 0xFF byte of using of load back deficiency is replenished (Pad).
In the TDD system, TTG (transmit/receive transition gap, transmission/reception change gap) and RTG (receive/transmit transition gap, reception/transmission change gap) can be when ascending-descending subframes replaces, reserve a period of time to allow BS finish transmitting-receiving alternately.
Foregoing description 802.16 OFDMs under the TDD of 802.16 standards or the frame structure of single carrier.Present 802.16 standards mainly contain 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, 802.16-2004 has only defined base station (BS) and two kinds of network elements of subscriber station (SS); 802.16e also only defined two kinds of network elements of BS and mobile subscriber station (MSS).
For coverage that enlarges BS or the throughput that increases subscriber station, 802.16 Multihop RelaySG (802.16 multi-hop transfer seminar) has proposed the notion of WiMAX RS (terminal), but BS, RS when up to the present also not having to propose to realize communicating by letter between BS and MSS/SS and the physical layer frame structure of MSS/SS based on RS, therefore, also can't really realize utilizing RS between BS and MSS, to realize transfer communication at present, promptly also not realize wireless middle rotating function at present based on terminal.
Summary of the invention
The purpose of this invention is to provide and a kind ofly realize wireless method for transfer, thereby make and to utilize RS to realize transfer communication between BS and the MSS, improve the performance of wireless communication system based on terminal.
The objective of the invention is to be achieved through the following technical solutions:
The invention provides and a kind ofly realize wireless method for transfer, comprising based on terminal:
A, in the downlink frame of base station BS physical layer frame structure and uplink frame, descending transfer district and up transfer district are set respectively, in the uplink frame of terminal RS physical layer frame structure and downlink frame, descending transfer district and up transfer district are set respectively, are used to define the time slot of forwarding operation between BS and the RS;
Adopt the TDD mode to carry out wireless transfer communication based on described uplink and downlink physical layer frame between B, described BS and the RS.
The time slot in up transfer district in the physical layer frame structure of described BS and descending transfer district is corresponding with the up transfer district and the time slot in descending transfer district in the physical layer frame structure of RS respectively, and, during the descending transfer district of BS and up transfer district correspondence, user terminal is not provided with and receives or sending time slots.
Described steps A comprises:
In the descending transfer district of the downlink frame of the physical frame structure of BS, descending transfer time slot is set, is used to define the descending time slot that is broadcast to RS by BS, broadcast corresponding broadcasting packet;
In the descending transfer district of the uplink frame of the physical frame structure of RS, descending transfer broadcast reception time slot is set, is used to define the RS ascending time slot that receives the descending transfer time slot of BS, receive corresponding broadcasting packet.
Described steps A also comprises:
In the downlink frame of the physical layer frame structure of BS and RS, descending interference time slot is set, and the descending interference time slot of BS and RS is not overlapping, described descending interference time slot is used for defining BS and the RS downlink data time slot of overlay area separately, the described zone that covers separately comprises the overlapping region that is only covered separately by BS and RS, perhaps, comprise the overlapping region that the not overlapping region that covered separately by BS and RS and BS and RS cover separately.
Described steps A also comprises:
In the physical layer frame structure downlink frame of BS and RS, the descending frame head time slot is set, be arranged at the zero hour of descending sub frame, be used to define time slot that sends user's synchronizing information and the time slot that sends indication information, position and using method profile with each time slot of indication BS and RS physical layer frame structure downlink frame and uplink frame, wherein, the descending frame head time slot of RS lags behind the descending frame head time slot of BS in time, and can not be overlapping with descending frame head time slot, descending transfer district and/or the descending interference time slot of the downlink frame of BS.
Described descending sub frame comprises:
Lead code preamble in OFDM or the single carrier frame, frame control head burst FCHburst and follow one or more line spaces down frame control head FCH after Burst that happen suddenly closely by downlink frame prefix DLFP appointment.
Described steps A also comprises:
When having a plurality of RS, the descending frame head time slot of RS in time can not with the descending frame head time slot of other RS, descending interference time slot and up transfer area overlapping.
Or
When having a plurality of RS, the DL Header Slot of different RS is overlapping fully in time, strict synchronism, and its content must be identical.
Described steps A also comprises:
In the downlink frame of the physical layer frame structure of RS, the descending frame head receiving slot is set, is used to define the time slot that RS receives BS descending frame head time slot, and the descending frame head time slot of this descending frame head receiving slot and BS needs complete overlapping and strict synchronism.
Described steps A also comprises:
In the downlink frame of the physical layer frame structure of BS and RS, descending noiseless time slot is set, and/or, in the uplink frame of the physical layer frame structure of BS and RS, up noiseless time slot is set, the downlink or uplink data slot that only is used to define the not overlapping region that covers separately by BS or RS, and the descending frame head time slot of RS need be positioned at the descending noiseless time slot of the downlink frame of BS in time.
Described steps A also comprises:
In the uplink frame of the physical layer frame structure of BS and RS, the uplink interference time slot is set, be used to define BS and the RS upstream data time slot under the overlay area separately, the described zone that covers separately comprises the overlapping region that is only covered separately by BS and RS, perhaps, the zone that comprises the overlapping covering that the not overlapping region that covered separately by BS and RS and BS and RS cover separately, wherein, the uplink interference time slot of the uplink interference time slot of BS and RS can not be overlapping on time slot.
Described steps A comprises:
When having a plurality of RS in the system, adopt the mode of time division multiplexing tdm to share uplink and downlink transfer district between each RS.
Described steps A also comprises:
In the uplink frame of the physical layer frame structure of BS and RS, up competition slot is set, wherein, the up competition slot of the up competition slot of BS and RS needs overlapping fully, and, in the uplink frame of the physical layer frame structure of RS, also be provided with up competition sending time slots, be used to define the time slot that is used for up competition slot that RS sends, described up competition sending time slots can not be overlapping with other the descending frame head time slot of RS, and described up competition sending time slots can not be overlapping with the up transfer district and/or the uplink interference time slot of the uplink frame of BS.
Described up competition slot comprises initial ranging Ranging competition slot and bandwidth request competition slot.
Described method also comprises:
Except that up transfer district and descending transfer district, the descending time slot of BS can not be overlapping with the ascending time slot of RS, and the ascending time slot of BS can not be overlapping with the descending time slot of RS.
Described method also comprises:
The downlink frame of BS is to reserving transmission/reception change gap TTG duration between the uplink frame of BS at least; The uplink frame of BS is to reserving reception/transmission change gap RTG duration between the downlink frame of BS at least; The downlink frame of RS is reserved the TTG duration at least between the uplink frame of RS; The uplink frame of RS is reserved the RTG duration at least between the downlink frame of RS.
Described steps A comprises:
The user terminal, RS and the BS that are in the BS overlay area need keep receiving frame synchronous, and the user terminal needs and the RS that are in the RS overlay area keep receiving frame synchronous.
Described steps A comprises:
Described descending frame head time slot and up competition slot are set to be present in BS and each frame of RS, and the up competition sending time slots of described descending transfer district, up transfer district, descending interference time slot, uplink interference time slot, RS, descending noiseless time slot and up noiseless time slot then are not set to be present in each frame.
Described step B comprises:
Carry out the mutual of message based on the up-downgoing transfer district, up-downgoing interference range, descending frame head time slot and/or the up competition slot that comprise in the uplink and downlink physical layer frame that is provided with between described BS and the RS, realize wireless transfer communication.
As seen from the above technical solution provided by the invention, method of the present invention can be supported the wireless senior transfer pattern of OFDM (or SC), be that MS/SS can carry out wireless transfer by RS and inserts BS, thereby effectively guarantee to communicate by letter at the same frequency of TDD/TDM/TDMA mode between RS and BS, MS/SS.Simultaneously, the present invention can also avoid RS to SS/MS
BS, BS is to SS/MS
RS, SS/MS
BSTo RS, SS/MS
RSTo BS, SS/MS
BSTo SS/MS
RS, SS/MS
RSTo SS/MS
BS, to RS, and RS is to the interference of communicating by letter between the BS to RS, BS for RS, with effective assurance transfer communication well.
Description of drawings
Fig. 1 is the frame structure schematic diagram of the OFDM (or SC) of 802.16 standard codes under the TDD;
Fig. 2 is the communication system schematic diagram 1 that comprises RS;
Fig. 3 is the communication system schematic diagram 2 that comprises RS
Fig. 4 is the co-channel interference pattern diagram;
Fig. 5 is the model schematic diagram of transfer communication between BS and the RS;
Fig. 6 is the physical layer frame structure schematic diagram 1 of BS and RS;
Fig. 7 is the physical layer frame structure schematic diagram 2 of BS and RS;
Fig. 8 is the physical layer frame structure schematic diagram 3 of BS and RS;
Fig. 9 is the physical layer frame structure schematic diagram 4 of BS and RS;
Figure 10 is the physical layer frame structure schematic diagram 5 of BS and RS.
Embodiment
Core of the present invention is the physical layer frame structure of definition BS and RS, thereby based on the wireless middle rotating function of the frame structure realization that defines based on terminal.
Among the present invention, the model of communication system of RS and BS, MS/SS has provided single RS situation system model as shown in Figures 2 and 3 among Fig. 2, provided the system model of the situation of many RS among Fig. 3.Adopt the TDD/TDM/TDMA mode communicating by letter with under the frequency in system 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.
Because the network system of tdd mode adopts with communication frequently, then will inevitably have the phase mutual interference of 4 kinds of situations shown in Fig. 4 (a)-(d).Wherein, TX represents sending module, the receiver module that RX represents.
Among the present invention, the overlay area of BS and RS is divided into 3 districts:
The 3rd district 3 is that be called for short 3 districts: only RS can cover, and does not exist BS to the MS/SS that the belongs to RS (MS among Fig. 2
RS), SS/MS
BSInterference to RS;
The transfer communication pattern of BS and RS as shown in Figure 5, specifically comprises following transmission frame:
(1) DL
BSBe the downlink frame of the physical layer frame of BS, by BS to SS/MS
BSOr RS;
(2) UL
BSFor the uplink frame of the physical layer frame of BS, by SS/MS
BSOr RS is to BS, SS/MS
BSKeep synchronously SS/MS with BS
BSKeep receiving frame synchronous with BS, RS and BS keep the slot synchronization of receiving and dispatching except that Relay Zone, TTG and RTG;
(3) DL
RSBe the downlink frame of the physical layer frame of RS, by BS to SS/MS
RSOr RS;
(4) UL
RSFor the uplink frame of the physical layer frame of RS, by SS/MS
RSOr RS is to BS, SS/MS
RSKeep receiving frame synchronous with RS.
Based on above-mentioned each frame, 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.
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 according to the transfer communication demand, 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.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 frame structure of the physical layer that defines BS and RS:
1, at the downlink frame DL of the physical layer frame structure of BS
BSThe middle DL Relay Zone (descending transfer district) that increases: be used to define and pass to the descending interim data time slot of BS of RS by BS; Wherein, for the situation of many RS shown in Figure 3, many RS adopt the mode of TDM to share DL Relay Zone;
2, at the uplink frame UL of the physical layer frame structure of RS
RSThe middle DL Relay Zone (descending transfer district) that increases: be used to define and pass to the descending interim data time slot of BS of RS by BS; Wherein, for the situation of many RS shown in Figure 3, many RS adopt the mode of TDM to share DL Relay Zone;
3, at the uplink frame UL of the physical layer frame structure of BS
BSThe middle UL Relay Zone (up transfer district) that increases: be used to define and pass to the up interim data time slot of BS of BS by RS; Wherein, for the situation of many RS shown in Figure 3, many RS adopt the mode of TDM to share UL Relay Zone;
4, at the downlink frame DL of the physical layer frame structure of RS
RSThe middle UL Relay Zone (up transfer district) that increases: be used to define and pass to the up interim data time slot of BS of BS by RS; Wherein, for the situation of many RS shown in Figure 3, many RS adopt the mode of TDM to share UL Relay Zone.
Time slot relation for the DL Relay Zone of the DL Relay Zone of described BS and RS, and the time slot of the UL Relay Zone of the UL Relay Zone of BS and RS relation must be corresponding one by one, like this, can guarantee to cooperate between BS and the RS transmitting-receiving of the information of carrying out.
And, during the DL of BS Relay Zone and UL Relay Zone correspondence, SS/MS
BSAnd SS/MS
RSDo not arrange any reception or sending time slots, purpose is for fear of 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 Slot (descending transfer time slot), be abbreviated as DL RB: be used to define the descending time slot 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 uplink frame UL of the physical layer frame structure of RS
RSDL Relay Zone in open up DLRelay Broadcast RX Slot (descending transfer broadcast reception time slot), be abbreviated as DL RB RX: be used to define the RS ascending time slot that receives the descending transfer time slot of BS, receive DCD, UCD, FPC, the CLK CMP broadcasting packet of 802.16 standard definitions.
Interference among the present invention in BS and the RS transfer communication process, also need carry out following definition at the physical layer frame of BS and RS:
1, at the downlink frame DL of the physical layer frame structure of BS
BSMiddle definition DL Interference Slot (descending interference time slot): the BS downlink data time slot that is used to define BS descending covering 1 district and 2 districts; For the situation of many RS shown in Figure 3, many RS adopt the mode of TDM to share DL Interference Slot, avoid the interference of RS to RS;
2, at the downlink frame DL of the physical layer frame structure of RS
RSMiddle definition DL Interference Slot (descending interference time slot): the RS downlink data time slot that is used to define RS descending covering 3 districts and 2 districts; For the situation of many RS shown in Figure 3, many RS adopt the mode of TDM to share DL Interference Slot, avoid the interference of RS to RS.
In the definition of above-mentioned frame structure, the DL Interference Slot of BS can not with DLInterference Slot overlaid on time slot of RS, to avoid RS to SS/MS
BSArrive SS/MS with BS
RSInterference.
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 downlink frame DL of the physical layer frame structure of BS
BSMiddle definition DL Header Slot (descending frame head time slot: be the beginning of descending sub frame, be used to define time slot that sends user's synchronizing information and the time slot that sends indication information, with the position and the using method profile of each time slot of indication BS physical layer frame structure downlink frame and uplink frame; Comprise in former 802.16OFDM (or SC) frame preamble (lead code), FCH burst (frame control head burst) and by the one or more descending Burst afterwards that follows closely of DLFP (downlink frame prefix) appointment at FCH (frame control head), described Burst comprises: DL-MAP (descending mapping table) and UL-MAP (up mapping table); In addition, SS/MSBS, RS and BS keep receiving frame synchronous, and RS and BS keep the slot synchronization of transmitting-receiving except that Relay Zone, TTG (transmission/reception change gap) and RTG (reception/transmission change gap);
2, at the downlink frame DL of the physical layer frame structure of RS
RSMiddle definition DL Header Slot (descending frame head time slot): be the beginning of descending sub frame, be used to define time slot that sends user's synchronizing information and the time slot that sends indication information, with the position and the using method profile of each time slot of indication RS physical layer frame structure downlink frame and uplink frame; Comprise in former 802.16 OFDM (or SC) frame preamble, FCH burst and by the one or more descending Burst after FCH of following closely of DLFP appointment, comprise DL-MAP and UL-MAP, SS/MS
RSKeep receiving frame synchronous with RS;
Wherein, the DL Header Slot of RS lags behind the DL Header Slot of BS in time, and can not with the downlink frame DL of the physical layer frame structure of BS
BSDL Header Slot, DL Delay Zone and DL Interference Slot overlapping.
The DL Header Slot of RS in time can not with the downlink frame DL of the physical layer frame structure of other RS
RSDL Header Slot, UL Contention TX Slot (up competition receiving slot), DLInterference Slot (descending interference time slot) and UL Delay Zone overlapping, avoid the interference of RS to RS; In particular cases, if the DL Header Slot of different RS is overlapping in time, then must be overlapping fully, strict synchronism, and its content must be identical, avoids the interference of RS to RS.
Simultaneously, receive the time slot of the DL Header Slot of BS for ease of RS, the present invention is also at the uplink frame UL of the physical layer frame structure of RS
RSIn definition DL Header RX Slot (descending frame head receiving slot): be used to define the time slot of the DL Header Slot that receives BS, and require the time slot relation of the DL Header RX Slot of the DL HeaderSlot of BS and RS must overlapping fully, strict synchronism.
Among the present invention,, also need the physical layer frame structure of BS and RS is done following definition, promptly define corresponding uplink interference time slot for avoiding uplink interference.
1, at the uplink frame UL of the physical layer frame structure of BS
BSMiddle definition UL Interference Slot (uplink interference time slot): the BS upstream data time slot that is used to define BS up covering 1 district and 2 districts; For the situation of many RS shown in Figure 3, many RS adopt the mode of TDM to share UL Interference Slot, avoid the interference of RS to RS;
2, at the uplink frame UL of the physical layer frame structure of RS
RSMiddle definition UL Interference Slot (uplink interference time slot): the RS upstream data time slot that is used to define RS up covering 3 districts and 2 districts; For the situation of many RS shown in Figure 3, many RS adopt the mode of TDM to share UL Interference Slot, avoid the interference of RS to RS;
At the UL Interference Slot of the BS of above-mentioned definition can not with UL InterferenceSlot overlaid on time slot of RS, avoid SS/MS
BSTo RS and SS/MS
RSInterference to BS.
Also defined the up competition slot of BS and RS among the present invention, specific as follows:
1, at the uplink frame UL of the physical layer frame structure of BS
BSIn definition UL Contention Slot (up competition slot), wherein, comprise and comprised Initial R anging (addressing) competition slot and bandwidth request competition slot in former 802.16 OFDM (or SC) frame;
2, at the uplink frame UL of the physical layer frame structure of RS
RSIn definition UL Contention Slot (up competition slot), wherein, comprise and comprised Initial R anging competition slot and bandwidth request competition slot in former 802.16OFDM (or SC) frame; The UL Contention TX Slot of described RS can not be overlapping with the up transfer district and/or the uplink interference time slot of the uplink frame of BS.
Downlink frame DL at the physical layer frame structure of RS
RSIn also defined UL Contention TX Slot (up competition sending time slots): be used to define that RS sends is used to compete the time slot of the UL ContentionSlot of BS;
The time slot relation of the UL Contention TX Slot of the UL Contention Slot of the BS of above-mentioned definition and RS must be overlapping fully, and strict synchronism.
In each frame structure of above-mentioned definition, except that DL Relay Zone and UL Relay Zone, the descending time slot of BS must not with the ascending time slot overlaid of RS, the ascending time slot of BS also must not with the descending time slot 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.
The downlink frame DL of BS
BSUplink frame UL to BS
BSBetween reserve the TTG duration at least; The uplink frame UL of BS
BSDownlink frame DL to BS
BSBetween reserve the RTG duration at least; The downlink frame DL of RS
RSUplink frame UL to RS
RSBetween reserve the TTG duration at least; The uplink frame UL of RS
RSDownlink frame DL to RS
RSBetween reserve the RTG duration at least.
And in each frame structure of above-mentioned definition, except that DL Header Slot and UL ContentionSlot, the not necessarily every frame of the Slot of above-mentioned definition or Zone all must exist.
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 is the schematic diagram of single RS situation, Fig. 7 is the schematic diagram of many RS situation.
BS downlink frame DL
BSWith RS downlink frame DL
RSIn the time slot that indicates of black block be DL HeaderSlot; BS uplink frame UL
BSWith RS uplink frame UL
RSIn the time slot that indicates of black block be ULContention Slot;
The downlink frame DL of RS
RSIn white elongate pieces to indicate time slot be UL Contention TX Slot, RS uplink frame UL
RSIn the time slot RX that indicates of white elongate pieces be DL Header RX Slot.
BS downlink frame DL
BSIn the TX time slot be DL Interference Slot, the descending covering of BS " 1 district " and " 2 district "; BS uplink frame UL
BSIn the RX time slot be UL Interference Slot, the up covering of BS " 1 district " and " 2 district ";
RS downlink frame DL
RSIn the TX time slot be DL Interference Slot, the descending covering of RS " 3 district " and " 2 district "; RS uplink frame UL
RSIn the RX time slot be UL Interference Slot, the up covering of RS " 3 district " and " 2 district ".
Among Fig. 6 and Fig. 7, the DL Relay Zone of BS is arranged in BS downlink frame DL
BSDL HeaderSlot after, the UL Relay Zone of BS is arranged in BS downlink frame DL
BSUL Contention Slot after.The time slot of the DL Relay Zone of the DL Relay Zone of BS and RS is corresponding one by one; The time slot of the UL Relay Zone of the ULRelay Zone of BS and RS is corresponding one by one; During the DL of BS Relay Zone and UL Relay Zone correspondence, MS does not arrange any reception or sending time slots.
UL Interference Slot non-overlapping on time slot of the UL Interference Slot of BS and RS, simultaneously, DL Interference Slot non-overlapping on time slot of the DL Interference Slot of BS and RS.
Among the present invention, situation for many RS shown in Figure 7, it (is the DL RB among Fig. 7 that many RS adopt the mode of TDM to share DLRelay Zone, DL Relay R# 1, #2... part), UL Relay Zone (is UL Relay R# 1, the #2... part), DL Interference Slot and UL InterferenceSlot, thereby can avoid the interference of RS to RS
The specific embodiment of the physical layer frame structure of second kind of BS provided by the invention and RS as shown in Figure 8.
Among Fig. 8, the UL Contention TX Slot of RS occurs every frame, as appear at N-1 frame (FrameN-1), N+1 frame (FrameN+1), N+3 frame (FrameN+3) ... downlink 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 downlink frame DL of N frame (FrameN)
BSThe end, then the DL Relay Zone of RS is arranged in the uplink frame UL of N frame (FrameN)
RSFirst of, be UL Contention Slot afterwards.The UL Relay Zone of BS is arranged in the uplink frame UL of N+1 frame (FrameN+1)
BSUL Contention Slot after.
The time slot of the DL Relay Zone of the DL Relay Zone of BS and RS is corresponding one by one; The time slot of the UL Relay Zone of the ULRelay Zone of BS and RS is corresponding one by one; During the DL of BS Relay Zone and UL Relay Zone correspondence, MS does not arrange any reception or sending time slots.
Among the present invention,, wherein can also comprise the definition of following time slot based on the physical layer frame structure of previously described BS and RS:
1, at the downlink frame DL of the physical layer frame structure of BS
BSThe middle DL Non-Interference Slot (descending noiseless time slot) that increases: the BS downlink data time slot that is used to define the descending covering of BS " 1 district ";
2, at the downlink frame DL of the physical layer frame structure of RS
RSThe middle DL Non-Interference Slot (descending noiseless time slot) that increases: the RS downlink data time slot that is used to define the descending covering of RS " 3 district ";
Wherein, but DL Non-Interference Slot overlaid on time slot of the DL Non-Interference Slot of BS and RS.
3, at the uplink frame UL of the physical layer frame structure of BS
BSThe middle UL Non-Interference Slot (up noiseless time slot) that increases: the BS upstream data time slot that is used to define the up covering of BS " 1 district ";
4, at the uplink frame UL of the physical layer frame structure of RS
RSThe middle UL Non-Interference Slot (up noiseless time slot) that increases: the RS upstream data time slot that is used to define the up covering of RS " 3 district ";
Wherein, but UL Non-Interference Slot overlaid on time slot of the UL Non-Interference Slot of BS and RS.
At this moment, the DL Header Slot of RS lags behind the DL Header Slot of BS in time, and the DL Header Slot of the DL Header Slot of RS and BS can not be overlapping; The DL Header Slot of RS must be positioned at the downlink frame DL of the physical layer frame structure of BS in time
BSDL Non-InterferenceSlot in;
And, the DL Header Slot of different RS in time can not with the downlink frame DL of the physical layer frame structure of other RS
RSDL Header Slot, UL Contention TX Slot, DL Relay Zone and DL Interference Slot overlapping, avoid the interference of " RS is to RS "; In particular cases, if the DL Header Slot of different RS is overlapping in time, then must be overlapping fully, strict synchronism, and its content must be identical, avoids the interference of RS to RS;
Based on above-mentioned BS and the RS physical layer frame that comprises descending noiseless time slot and up noiseless time slot, the physical layer frame structure embodiment of the third BS provided by the invention and RS as shown in Figure 9, wherein:
BS downlink frame DL
BSWith RS downlink frame DL
RSIn the time slot that indicates of black block be DL HeaderSlot; BS uplink frame UL
BSWith RS uplink frame UL
RSIn the time slot that indicates of black block be ULContention Slot;
The downlink frame DL of RS
RSIn the TX time slot that indicates of white elongate pieces be UL Contention TXSlot, RS uplink frame UL
RSIn the RX time slot that indicates of white elongate pieces be DL Header RX Slot.
BS downlink frame DL
BSIn the TX1 time slot be DL Non-Interference Slot, the descending covering of BS " 1 district ", the TX time slot is DL Interference Slot, the descending covering of BS " 1 district " and " 2 district "; BS uplink frame UL
BSIn the RX1 time slot be UL Non-Interference Slot, the up covering of BS " 1 district ", the RX time slot is UL Interference Slot, the up covering of BS " 1 district " and " 2 district ";
RS downlink frame DL
RSIn the TX3 time slot be DL Non-lnterference Slot, the descending covering of RS " 3 district ", the TX time slot is DL Interference Slot, the descending covering of RS " 3 district " and " 2 district "; RS uplink frame UL
RSIn the RX3 time slot be UL Non-Interference Slot, the up covering of RS " 3 district ", the RX time slot is UL Interference Slot, the up covering of RS " 3 district " and " 2 district ".
The DL Relay Zone of BS is arranged in BS downlink frame DL
BSDL Header Slot after, the UL Relay Zone of BS is arranged in BS downlink frame DL
BSUL Contention Slot after.
The time slot of the DL Relay Zone of the DL Relay Zone of BS and RS is corresponding one by one; The time slot of the UL Relay Zone of the ULRelay Zone of BS and RS is corresponding one by one; During the DL of BS Relay Zone and UL Relay Zone correspondence, MS does not arrange any reception or sending time slots.
UL Interference Slot non-overlapping on time slot of the UL Interference Slot of BS and RS, DL Interference Slot non-overlapping on time slot of the DL Interference Slot of BS and RS.
Among the present invention, the zone (being described 2 districts) that the interference time slot in the physical layer frame structure of described BS and RS can also be only can both cover BS and RS defines, and is specific as follows:
1, at the downlink frame DL of the physical layer frame structure of BS
BSMiddle definition DL Interference Slot (descending interference time slot): the BS downlink data time slot that is used to define the descending covering of BS " 2 district "; For the situation of many RS shown in Figure 3, many RS adopt the mode of TDM to share DL Interference Slot, avoid the interference of " RS is to RS ";
2, at the downlink frame DL of the physical layer frame structure of RS
RSMiddle definition DL Interference Slot (descending interference time slot): the RS downlink data time slot that is used to define the descending covering of RS " 2 district "; For the situation of many RS shown in Figure 3, many RS adopt the mode of TDM to share DL Interference Slot, avoid the interference of " RS is to RS ";
3, at the uplink frame UL of the physical layer frame structure of BS
BSMiddle definition UL Interference Slot (uplink interference time slot): the BS upstream data time slot that is used to define the up covering of BS " 2 district "; For the situation of many RS shown in Figure 3, many RS adopt the mode of TDM to share UL Interference Slot, avoid the interference of " RS is to RS ";
4, at the uplink frame UL of the physical layer frame structure of RS
RSMiddle definition UL Interference Slot (uplink interference time slot): the RS upstream data time slot that is used to define the up covering of RS " 2 district "; For the situation of many RS shown in Figure 3, many RS adopt the mode of TDM to share UL Interference Slot, avoid the interference of " RS is to RS ";
Based on the physical layer frame structure of above-mentioned BS and RS, the physical layer frame structure embodiment of the 4th kind of BS provided by the invention and RS as shown in figure 10, wherein:
BS downlink frame DL
BSWith RS downlink frame DL
RSIn the time slot that indicates of black block be DL HeaderSlot; BS uplink frame UL
BSWith RS uplink frame UL
RSIn the time slot that indicates of black block be ULContention Slot;
The downlink frame DL of RS
RSIn the TX time slot that indicates of white elongate pieces be UL Contention TXSlot, RS uplink frame UL
RSIn the RX time slot that indicates of white elongate pieces be DL Header RX Slot.
BS downlink frame DL
BSIn the TX1 time slot be DL Non-Interference Slot, the descending covering of BS " 1 district ", the TX2 time slot is DL Interference Slot, the descending covering of BS " 2 district "; BS uplink frame UL
BSIn the RX1 time slot be UL Non-Interference Slot, the up covering of BS " 1 district ", " RX2 time slot " is UL Interference Slot (the up covering of BS " 2 district ");
RS downlink frame DL
RSIn the TX3 time slot be DL Non-Interference Slot, the descending covering of RS " 3 district ", the TX2 time slot is DL Interference Slot, the descending covering of RS " 2 district "; RS uplink frame UL
RSIn the RX3 time slot be UL Non-Interference Slot, the up covering of RS " 3 district ", the RX2 time slot is UL Interference Slot, the up covering of RS " 2 district ".
The DL Relay Zone of BS is arranged in BS downlink frame DL
BSDL Header Slot after, the UL Relay Zone of BS is arranged in BS downlink frame DL
BSUL Contention Slot after.
The time slot of the DL Relay Zone of the DL Relay Zone of BS and RS is corresponding one by one; The time slot of the UL Relay Zone of the ULRelay Zone of BS and RS is corresponding one by one; During the DL of BS Relay Zone and UL Relay Zone correspondence, MS does not arrange any reception or sending time slots.
UL Interference Slot non-overlapping on time slot of the UL Interference Slot of BS and RS, DL Interference Slot non-overlapping on time slot of the DL Interference Slot of BS and RS.The DL Non-Interference Slot of the DL Non-Interference Slot of BS and RS overlaid as far as possible on time slot.The UL Non-Interference Slot of the UL Non-Interference Slot of BS and RS overlaid as far as possible on time slot.
In sum, complete definition of the present invention BS and RS carry out the physical layer frame structure of transfer communication process need, make and to carry out smoothly, and can effectively avoid issuable various interference in the communication system, to guarantee communication efficiency well based on the transfer communication of RS.
The above; only for the preferable embodiment of the present invention, but protection scope of the present invention is not limited thereto, and anyly is familiar with those skilled in the art in the technical scope that the present invention discloses; the variation that can expect easily or replacement all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection range of claim.
Claims (18)
1, a kind ofly realize wireless method for transfer, it is characterized in that, comprising based on terminal:
A, in the downlink frame of base station BS physical layer frame structure and uplink frame, descending transfer district and up transfer district are set respectively, in the uplink frame of terminal RS physical layer frame structure and downlink frame, descending transfer district and up transfer district are set respectively, are used to define the time slot of forwarding operation between BS and the RS;
Adopt the TDD mode to carry out wireless transfer communication based on described uplink and downlink physical layer frame between B, described BS and the RS.
2, according to claim 1ly realize wireless method for transfer based on terminal, it is characterized in that, the time slot in up transfer district in the physical layer frame structure of described BS and descending transfer district is corresponding with the up transfer district and the time slot in descending transfer district in the physical layer frame structure of RS respectively, and, during the descending transfer district of BS and up transfer district correspondence, user terminal is not provided with and receives or sending time slots.
3, according to claim 1ly realize wireless method for transfer, it is characterized in that described steps A comprises based on terminal:
In the descending transfer district of the downlink frame of the physical frame structure of BS, descending transfer time slot is set, is used to define the descending time slot that is broadcast to RS by BS, broadcast corresponding broadcasting packet;
In the descending transfer district of the uplink frame of the physical frame structure of RS, descending transfer broadcast reception time slot is set, is used to define the RS ascending time slot that receives the descending transfer time slot of BS, receive corresponding broadcasting packet.
4, according to claim 1ly realize wireless method for transfer, it is characterized in that described steps A also comprises based on terminal:
In the downlink frame of the physical layer frame structure of BS and RS, descending interference time slot is set, and the descending interference time slot of BS and RS is not overlapping, described descending interference time slot is used for defining BS and the RS downlink data time slot of overlay area separately, the described zone that covers separately comprises the overlapping region that is only covered separately by BS and RS, perhaps, comprise the overlapping region that the not overlapping region that covered separately by BS and RS and BS and RS cover separately.
5, according to claim 1ly realize wireless method for transfer, it is characterized in that described steps A also comprises based on terminal:
In the physical layer frame structure downlink frame of BS and RS, the descending frame head time slot is set, be arranged at the zero hour of descending sub frame, be used to define time slot that sends user's synchronizing information and the time slot that sends indication information, position and using method profile with each time slot of indication BS and RS physical layer frame structure downlink frame and uplink frame, wherein, the descending frame head time slot of RS lags behind the descending frame head time slot of BS in time, and can not be overlapping with descending frame head time slot, descending transfer district and/or the descending interference time slot of the downlink frame of BS.
6, according to claim 5ly 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 burst FCHburst and follow one or more line spaces down frame control head FCH after Burst that happen suddenly closely by downlink frame prefix DLFP appointment.
7, according to claim 5ly realize wireless method for transfer, it is characterized in that described steps A also comprises based on terminal:
When having a plurality of RS, the descending frame head time slot of RS in time can not with the descending frame head time slot of other RS, descending interference time slot and up transfer area overlapping.
Or
When having a plurality of RS, the DL Header Slot of different RS is overlapping fully in time, strict synchronism, and its content must be identical.
8, according to claim 5ly realize wireless method for transfer, it is characterized in that described steps A also comprises based on terminal:
In the downlink frame of the physical layer frame structure of RS, the descending frame head receiving slot is set, is used to define the time slot that RS receives BS descending frame head time slot, and the descending frame head time slot of this descending frame head receiving slot and BS needs complete overlapping and strict synchronism.
9, according to claim 1ly realize wireless method for transfer, it is characterized in that described steps A also comprises based on terminal:
In the downlink frame of the physical layer frame structure of BS and RS, descending noiseless time slot is set, and/or, in the uplink frame of the physical layer frame structure of BS and RS, up noiseless time slot is set, the downlink or uplink data slot that only is used to define the not overlapping region that covers separately by BS or RS, and the descending frame head time slot of RS need be positioned at the descending noiseless time slot of the downlink frame of BS in time.
10, according to claim 1ly realize wireless method for transfer, it is characterized in that described steps A also comprises based on terminal:
In the uplink frame of the physical layer frame structure of BS and RS, the uplink interference time slot is set, be used to define BS and the RS upstream data time slot under the overlay area separately, the described zone that covers separately comprises the overlapping region that is only covered separately by BS and RS, perhaps, the zone that comprises the overlapping covering that the not overlapping region that covered separately by BS and RS and BS and RS cover separately, wherein, the uplink interference time slot of the uplink interference time slot of BS and RS can not be overlapping on time slot.
11, describedly realize wireless method for transfer according to claim 1,4 or 10, it is characterized in that described steps A comprises based on terminal:
When having a plurality of RS in the system, adopt the mode of time division multiplexing tdm to share uplink and downlink transfer district between each RS.
12, according to claim 1ly realize wireless method for transfer, it is characterized in that described steps A also comprises based on terminal:
In the uplink frame of the physical layer frame structure of BS and RS, up competition slot is set, wherein, the up competition slot of the up competition slot of BS and RS needs overlapping fully, and, in the uplink frame of the physical layer frame structure of RS, also be provided with up competition sending time slots, be used to define the time slot that is used for up competition slot that RS sends, described up competition sending time slots can not be overlapping with other the descending frame head time slot of RS, and described up competition sending time slots can not be overlapping with the up transfer district and/or the uplink interference time slot of the uplink frame of BS.
13, according to claim 12ly realize wireless method for transfer, it is characterized in that described up competition slot comprises initial ranging Ranging competition slot and bandwidth request competition slot based on terminal.
14, according to each describedly realizes wireless method for transfer based on terminal in the claim 1 to 10,12 and 13, it is characterized in that described method also comprises:
Except that up transfer district and descending transfer district, the descending time slot of BS can not be overlapping with the ascending time slot of RS, and the ascending time slot of BS can not be overlapping with the descending time slot of RS.
15, according to each describedly realizes wireless method for transfer based on terminal in the claim 1 to 10,12 and 13, it is characterized in that described method also comprises:
The downlink frame of BS is to reserving transmission/reception change gap TTG duration between the uplink frame of BS at least; The uplink frame of BS is to reserving reception/transmission change gap RTG duration between the downlink frame of BS at least; The downlink frame of RS is reserved the TTG duration at least between the uplink frame of RS; The uplink frame of RS is reserved the RTG duration at least between the downlink frame of RS.
16, according to each describedly realizes wireless method for transfer based on terminal in the claim 1 to 10,12 and 13, it is characterized in that described steps A comprises:
The user terminal, RS and the BS that are in the BS overlay area need keep receiving frame synchronous, and the user terminal needs and the RS that are in the RS overlay area keep receiving frame synchronous.
17, according to each describedly realizes wireless method for transfer based on terminal in the claim 1 to 10,12 and 13, it is characterized in that described steps A comprises:
Described descending frame head time slot and up competition slot are set to be present in BS and each frame of RS, and the up competition sending time slots of described descending transfer district, up transfer district, descending interference time slot, uplink interference time slot, RS, descending noiseless time slot and up noiseless time slot then are not set to be present in each frame.
18, according to each describedly realizes wireless method for transfer based on terminal in the claim 1 to 10,12 and 13, it is characterized in that described step B comprises:
Carry out the mutual of message based on the up-downgoing transfer district, up-downgoing interference range, descending frame head time slot and/or the up competition slot that comprise in the uplink and downlink physical layer frame that is provided with between described BS and the RS, realize wireless transfer communication.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2005101062913A CN1941665B (en) | 2005-09-30 | 2005-09-30 | Method for realizing radio transit based on transfer station |
| 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 |
| 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 |
| US12/058,451 US8218469B2 (en) | 2005-09-30 | 2008-03-28 | Wireless relay communication system and method |
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| CN2005101062913A CN1941665B (en) | 2005-09-30 | 2005-09-30 | Method for realizing radio transit based on transfer station |
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| CN1941665B CN1941665B (en) | 2011-06-01 |
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| CN2006800122322A Expired - Fee Related CN101160997B (en) | 2005-09-30 | 2006-09-29 | Radio transfer communication system and its method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2008110101A1 (en) * | 2007-03-09 | 2008-09-18 | Da Tang Mobile Communications Equipment Co., Ltd | Realizing method and apparatus for supporting relay in cellular system to avoid uplink-downlink interference |
| CN101841363A (en) * | 2009-03-18 | 2010-09-22 | 中兴通讯股份有限公司 | Transmission method and system for relay link control channel |
| CN102273243A (en) * | 2008-11-12 | 2011-12-07 | 诺基亚西门子通信公司 | Structure for ota enb-enb communication |
| CN101282156B (en) * | 2007-04-05 | 2012-07-18 | 中兴通讯股份有限公司 | Method for transmitting load between links capable of supporting variation of multi-jump relay network |
| CN101442357B (en) * | 2007-11-19 | 2012-10-10 | 电信科学技术研究院 | Method and system for wireless transmission adopting Relay supported frame structure |
| US9203501B2 (en) | 2008-10-24 | 2015-12-01 | Huawei Technologies Co., Ltd. | Relay transmission method and apparatus |
| CN103179071B (en) * | 2008-10-24 | 2016-03-09 | 华为技术有限公司 | The method and apparatus of relay transmission |
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| WO2010102450A1 (en) | 2009-03-11 | 2010-09-16 | 华为技术有限公司 | Method, device and system for identifying different frame structures |
| US10404434B2 (en) * | 2017-02-21 | 2019-09-03 | Qualcomm Incorporated | Discovery and random access for shared spectrum |
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| JP2000134143A (en) * | 1998-10-23 | 2000-05-12 | Fujitsu Ltd | Radio relay system utilizing time division multiple access time division two-way transmission system |
| DE19950005A1 (en) * | 1999-10-18 | 2001-04-19 | Bernhard Walke | Range enhancement operating method for mobile radio communications base station uses mobile stations within normal range as relay stations for reaching mobile stations outside normal operating range |
| US7386036B2 (en) * | 2003-12-31 | 2008-06-10 | Spyder Navigations, L.L.C. | Wireless multi-hop system with macroscopic multiplexing |
| CN1956354A (en) * | 2005-10-26 | 2007-05-02 | 华为技术有限公司 | Radio relay communication system and implementing method |
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| WO2008110101A1 (en) * | 2007-03-09 | 2008-09-18 | Da Tang Mobile Communications Equipment Co., Ltd | Realizing method and apparatus for supporting relay in cellular system to avoid uplink-downlink interference |
| CN101282156B (en) * | 2007-04-05 | 2012-07-18 | 中兴通讯股份有限公司 | Method for transmitting load between links capable of supporting variation of multi-jump relay network |
| CN101442357B (en) * | 2007-11-19 | 2012-10-10 | 电信科学技术研究院 | Method and system for wireless transmission adopting Relay supported frame structure |
| CN103179071B (en) * | 2008-10-24 | 2016-03-09 | 华为技术有限公司 | The method and apparatus of relay transmission |
| US9203501B2 (en) | 2008-10-24 | 2015-12-01 | Huawei Technologies Co., Ltd. | Relay transmission method and apparatus |
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| CN102273243A (en) * | 2008-11-12 | 2011-12-07 | 诺基亚西门子通信公司 | Structure for ota enb-enb communication |
| CN101841363A (en) * | 2009-03-18 | 2010-09-22 | 中兴通讯股份有限公司 | Transmission method and system for relay link control channel |
| CN105681000A (en) * | 2009-08-21 | 2016-06-15 | 应用转换有限责任公司 | OFDM communication method and transmitter used for OFDM communication |
| US10079707B1 (en) | 2009-08-21 | 2018-09-18 | Applied Transform, Llc | Receiver method and apparatus for variable header repetition in a wireless OFDM network |
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| US11212146B2 (en) | 2009-08-21 | 2021-12-28 | AX Wireless, LLC | Header repetition in packet-based OFDM systems |
Also Published As
| Publication number | Publication date |
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| CN1941665B (en) | 2011-06-01 |
| CN101160997A (en) | 2008-04-09 |
| CN101160997B (en) | 2012-11-07 |
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