CN101873630A - Wireless communication method, system and device thereof - Google Patents
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Abstract
The invention relates to a wireless communication system, comprising a relay node and a base station, wherein the relay node is used for selecting an up sub-frame or a sub-frame from a frame structure of a TDD mode or an FDD mode to configure as an up sub-frame for a backhaul link from the base station to the relay node, selecting a down sub-frame or a sub-frame to configure as a down sub-frame for a backhaul link, and sending data to or receiving data from the base station by the up sub-frame and down sub-frame of the backhaul link; and the base station is used for sending data to or receiving data from the relay node by the up sub-frame and down sub-frame of the backhaul link. The invention can realize up and down data transmission of relay communication in the backhaul link.
Description
Technical field
The present invention relates to the communications field, relate in particular to wireless communications method and system.
Background technology
At existing Long Term Evolution (Long Time Evolution, LTE) in the standard, time division duplex (Time Division Duplex, TDD) frame structure of pattern as shown in Figure 1, each 10ms radio frames comprises two fields (half-frame), each field comprises the subframe (subframe) of 5 1ms again, and each subframe can be divided into common time slot (slot) or 3 special time slot DwPTS of two 0.5ms again, and GP and UpPTS form a special subframe (S).Wherein subframe 0 must be a descending sub frame, and the broadcast singal of its synchronizing signal, non-scheduling (for example Master Information Block MIB, Master Information Block) is all in this subframe; Consider the switching of up-downgoing, subframe 2 must be a sub-frame of uplink.
Two 5ms fields in radio frames can be two identical field structures as shown in Figure 1, promptly are that 5ms is the frame structure in cycle, and its uplink and downlink timeslot configuration can have following several: 1DL:3UL; 2DL:2UL; 3DL:1UL.Consider the compatibility of utilization ratio of wireless resources and different frame structure in addition, two 5ms fields also can be different frame structures, have only a field to have the special time slot of 1ms (S), but the special time slot flexible configuration of 5ms is the up-downgoing data slot in addition, promptly be the frame structure in cycle with 10ms, its uplink and downlink timeslot configuration can have following several: 6DL:3UL; 7DL:2UL; 8DL:1UL; 3DL:5UL.Its 7 kinds of uplink/downlink frames structural arrangements are as shown in table 1 below.
Table 1
About (the Frequency Division Duplex of Frequency Division Duplexing (FDD) in the LTE standard, FDD) frame structure of pattern as shown in Figure 2, the FDD frame structure can be used for FDD duplex and half-duplex FDD, each radio frames is 10ms, the time slot that to comprise 20 length be 0.5ms, index is 0 to 19.A subframe definition is two continuous time slot, comprises time slot 2i and 2i+1 as subframe i.For FDD, uplink and downlink transfer adopt frequency division in each radio frames, have 10 descending sub frames and 10 sub-frame of uplink to use respectively.In half-duplex FDD operation, UE can not send and receive simultaneously, but full duplex FDD is not limited.
At present, and via node (Relay Node, introducing RN) makes the Radio Link based on the mobile communication system of repeater (Relay) have three: the direct projection link (direct link) of base station-Hong subscriber equipment (eNB-macro UE); The back haul link of base station-via node (eNB-RN) (backhaul link); And the access link (access link) of via node-trunk subscriber equipment (RN-relay UE).Therefore consider the signal interference-limited of radio communication, three links need use the Radio Resource of quadrature.Because the transceiver of via node is the TDD mode of operation, back haul link is to take different time slots in the tdd frame structure with access link, but direct projection link and back haul link are can be coexistent, as long as its running time-frequency resource quadrature.
Yet (Long Time Evolution LTE) has only defined the transmission frame-form pattern to the direct projection link of UE and RN to the access link of UE about eNB, the frame structure of promptly above-mentioned tdd mode and fdd mode to present Long Term Evolution in the standard.Therefore, need to propose the communication to the RN back haul link, to solve the uplink and downlink transfer of data of mobile communication system on back haul link based on Relay about eNB.
Summary of the invention
Purpose of the present invention is intended to one of solve the aforementioned problems in the prior at least.
For this reason, embodiments of the invention propose a kind of wireless communications method and system.
According to an aspect of the present invention, the embodiment of the invention provides a kind of wireless communications method, said method comprising the steps of: via node RN selects at least one sub-frame of uplink to be configured to the sub-frame of uplink of described RN to the back haul link of base station from the frame structure of TDD pattern, and selects at least one descending sub frame to be configured to the descending sub frame of described back haul link; The sub-frame of uplink of described RN by described back haul link sends data and the descending sub frame by described back haul link receives the data that described base station sends to described base station; The sub-frame of uplink of described base station by described back haul link receives data that described RN sends and the descending sub frame by described back haul link to described RN transmission data.
The further embodiment according to the present invention, the descending sub frame balanced configuration of the sub-frame of uplink of described back haul link and described back haul link.The quantity of the descending sub frame of described back haul link can equal the quantity of the sub-frame of uplink of described back haul link, and the descending sub frame of described back haul link disposes according to mixing automatic repeat requests HARQ timing relationship in pairs with the sub-frame of uplink of back haul link.Preferably, the ratio of the descending sub frame quantity of described back haul link and the sub-frame of uplink quantity of described back haul link is with to be used for via node in the frame structure of described tdd mode approaching to the ratio of the descending sub frame quantity of the access link of subscriber equipment and sub-frame of uplink quantity.
The further embodiment according to the present invention, the sub-frame of uplink of described back haul link and the descending sub frame of described back haul link can asymmetricly dispose.Preferably, the quantity of the descending sub frame of described back haul link is greater than the quantity of the sub-frame of uplink of described back haul link, and some descending sub frames of the sub-frame of uplink of wherein said back haul link and back haul link dispose in pairs according to the HARQ timing relationship; The ratio of the descending sub frame quantity of described back haul link and the sub-frame of uplink quantity of described back haul link is with to be used for via node in the frame structure of described tdd mode approaching to the ratio of the descending sub frame quantity of the access link of subscriber equipment and sub-frame of uplink quantity.
The further embodiment according to the present invention, described RN confirms/denies the sub-frame of uplink that ACK/NACK feeds back according to the HARQ timing relationship and corresponding being used to of descending sub frame of back haul link, disposes the sub-frame of uplink of described back haul link.
The further embodiment according to the present invention, the sub-frame of uplink of described back haul link and descending sub frame preferentially are configured in respectively on a plurality of continuous sub-frame of uplink and descending sub frame of via node frame structure, and the sub-frame of uplink number that is used for back haul link in a radio frames is less than the sub-frame of uplink number in this radio frames.
The further embodiment according to the present invention, the descending sub frame of described selection preferably do not comprise the subframe that is used for synchronous signal transmission and/or call.
According to a further aspect in the invention, embodiments of the invention propose a kind of wireless communications method, said method comprising the steps of: via node RN selects at least one sub-frame configuration from the frame structure of FDD pattern be the sub-frame of uplink of described RN to the back haul link of described base station, and to select at least one sub-frame configuration be the descending sub frame of described back haul link; The sub-frame of uplink of described RN by described back haul link sends data and the descending sub frame by described back haul link receives the data that described base station sends to described base station; The sub-frame of uplink of described base station by described back haul link receives data that described RN sends and the descending sub frame by described back haul link to described RN transmission data.
The further embodiment according to the present invention, the sub-frame of uplink of described back haul link and the descending sub frame of described back haul link are balanced configuration.The descending sub frame quantity that can dispose described back haul link equals the sub-frame of uplink quantity of described back haul link, and the sub-frame of uplink of the descending sub frame of described back haul link and back haul link disposes in pairs according to the HARQ timing relationship.Preferred described sub-frame of uplink respectively and the time-delay between the descending sub frame of paired configuration be 3 subframe lengths.
The further embodiment according to the present invention, the sub-frame of uplink of described back haul link and the descending sub frame of described back haul link are asymmetric configuration.The descending sub frame quantity of preferred described back haul link is greater than the sub-frame of uplink quantity of described back haul link, and some descending sub frames of the sub-frame of uplink of described back haul link and back haul link dispose in pairs according to the HARQ timing relationship.The descending sub frame of preferred a plurality of described back haul links is feedback acknowledgment/deny ACK/NACK on the sub-frame of uplink of a described back haul link.Time-delay in the descending sub frame of described a plurality of back haul links between last sub-frame of uplink of the sub-frame of uplink of last descending sub frame and described a plurality of back haul links is 3 subframe lengths.
The sub-frame of uplink of described back haul link and descending sub frame preferentially are configured in respectively on a plurality of continuous sub-frame of uplink and descending sub frame of via node frame structure, and the sub-frame of uplink number that is used for back haul link in a radio frames is less than the sub-frame of uplink number in this radio frames.
The further embodiment according to the present invention, the described subframe that described RN selects to be configured to described back haul link descending sub frame does not preferably comprise the subframe that is used for synchronous signal transmission and/or call.
The further embodiment according to the present invention, the sub-frame of uplink of a plurality of back haul links and descending sub frame preferentially are configured in respectively on a plurality of continuous sub-frame of uplink and descending sub frame, and in a radio frames, the sub-frame of uplink number of back haul link is less than the number of sub-frame of uplink in the radio frames.
In accordance with a further aspect of the present invention, embodiments of the invention propose a kind of wireless communication system, and described system comprises via node RN and base station.Described RN selects at least one sub-frame of uplink to be configured to the sub-frame of uplink of described RN to the back haul link of described base station from the frame structure of TDD pattern, and selects at least one descending sub frame to be configured to the descending sub frame of described back haul link; Sub-frame of uplink by described back haul link sends data to described base station; And the data that receive the transmission of described base station by the descending sub frame of described back haul link.Described base station, the descending sub frame by described back haul link sends data to described RN; And the data that receive described RN transmission by the sub-frame of uplink of described back haul link.
The further embodiment according to the present invention, described RN balanced configuration or the sub-frame of uplink of the described back haul link of asymmetric configuration and the descending sub frame of described back haul link.And, described RN disposes the ratio of the sub-frame of uplink quantity of the descending sub frame quantity of described back haul link and described back haul link, with to be used for via node in the frame structure of described tdd mode approaching to the ratio of the descending sub frame quantity of the access link of subscriber equipment and sub-frame of uplink quantity.In balanced configuration, the quantity that described RN disposes the descending sub frame of described back haul link equals the quantity of the sub-frame of uplink of described back haul link, and the descending sub frame of described back haul link disposes according to mixing automatic repeat requests HARQ timing relationship in pairs with the sub-frame of uplink of back haul link.When asymmetric configuration, the quantity of the descending sub frame of the described back haul link of described RN preferred disposition is greater than the quantity of the sub-frame of uplink of described back haul link, and some descending sub frames of the sub-frame of uplink of described back haul link and back haul link dispose in pairs according to the HARQ timing relationship.
The further embodiment according to the present invention, the sub-frame of uplink that is used for access link and confirms/deny the ACK/NACK feedback that RN is corresponding according to the descending sub frame of HARQ timing relationship and back haul link disposes the sub-frame of uplink of described back haul link.
The further embodiment according to the present invention, the described descending sub frame that described RN selects does not preferably comprise the subframe that is used for synchronous signal transmission and/or call.
The further embodiment according to the present invention, the sub-frame of uplink and the descending sub frame of a plurality of back haul links of described RN configuration preferentially are configured in respectively on a plurality of continuous sub-frame of uplink and descending sub frame, and in a radio frames, the sub-frame of uplink number of the back haul link of RN configuration is less than the number of sub-frame of uplink in the radio frames.
According to another aspect of the invention, embodiments of the invention propose a kind of wireless communication system, and described system comprises via node RN and base station.Described RN, selecting at least one sub-frame configuration from the frame structure of time division duplex fdd mode is the sub-frame of uplink of described RN to the back haul link of described base station, and to select at least one sub-frame configuration be the descending sub frame of described back haul link; Sub-frame of uplink by described back haul link sends data to described base station; And the data that receive the transmission of described base station by the descending sub frame of described back haul link.Described base station, the descending sub frame by described back haul link sends data to described RN; And the data that receive described RN transmission by the sub-frame of uplink of described back haul link.
The further embodiment according to the present invention, described RN claims to dispose the sub-frame of uplink of described back haul link and the descending sub frame of described back haul link, the descending sub frame quantity that disposes described back haul link equals the sub-frame of uplink quantity of described back haul link, and the sub-frame of uplink of the descending sub frame of described back haul link and back haul link disposes in pairs according to the HARQ timing relationship.Described sub-frame of uplink respectively and the time-delay between the descending sub frame of paired configuration be preferably 3 subframe lengths.
The further embodiment according to the present invention, the sub-frame of uplink of the described back haul link of the asymmetric configuration of described RN and the descending sub frame of described back haul link.The descending sub frame quantity of the described back haul link of RN preferred disposition is greater than the sub-frame of uplink quantity of described back haul link, and some descending sub frames of the sub-frame of uplink of described back haul link and back haul link dispose in pairs according to the HARQ timing relationship.The descending sub frame that described RN disposes a plurality of described back haul links is feedback acknowledgment/deny ACK/NACK on the sub-frame of uplink of a described back haul link.Predetermined time-delay in the descending sub frame of described a plurality of back haul links between last sub-frame of uplink of the sub-frame of uplink of last descending sub frame and described a plurality of back haul links is 3 subframe lengths.
The further embodiment according to the present invention, the described subframe that described RN selects does not comprise the subframe that is used for synchronous signal transmission and/or call.
The further embodiment according to the present invention, the sub-frame of uplink of a plurality of back haul links of RN and descending sub frame preferentially are configured in respectively on a plurality of continuous sub-frame of uplink and descending sub frame, and in a radio frames, the sub-frame of uplink number of the back haul link of RN configuration is less than the number of sub-frame of uplink in the radio frames.
According to another aspect of the invention, embodiments of the invention propose a kind of via node, comprise sub-frame of uplink dispensing unit, descending sub frame dispensing unit, transmitting element and receiving element.Described sub-frame of uplink dispensing unit, selecting at least one sub-frame of uplink or select at least one sub-frame configuration from the frame structure of TDD pattern from the frame structure of FDD pattern is the sub-frame of uplink of described via node to the back haul link of base station; Described descending sub frame dispensing unit, selecting at least one descending sub frame or select at least one sub-frame configuration from the frame structure of described tdd mode from the frame structure of described fdd mode is the descending sub frame of described via node to the back haul link of base station; Described transmitting element, the sub-frame of uplink by described back haul link sends data to the base station; Described receiving element, the descending sub frame by described back haul link receives the data that the base station sends.
According to a further aspect in the invention, embodiments of the invention propose a kind of base station, comprise receiving element and transmitting element.Described receiving element, receive via node by the data of via node to the sub-frame of uplink transmission of the back haul link of base station, the sub-frame of uplink of wherein said back haul link is selected at least one sub-frame of uplink by via node or select at least one sub-frame configuration from the frame structure of FDD pattern from the frame structure of TDD pattern; Described transmitting element, descending sub frame by back haul link sends data to via node, and the descending sub frame of wherein said back haul link is selected at least one descending sub frame by via node or select at least one sub-frame configuration from the frame structure of FDD pattern from the frame structure of TDD pattern.
The mobile communication system that the present invention is based on via node has proposed the radio communication system at the back haul link between via node RN and the base station, thereby can realize the uplink and downlink transfer of data of Relay communication system at back haul link.
In addition, under tdd mode, the present invention is by symmetry or the upper and lower sub-frame configuration of asymmetric back haul link, avoids or reduces influence to the automatic repeat requests timing relationship of the mixing of access link as much as possible.By the configuration back haul link the uplink and downlink sub-frame number than with access link uplink and downlink sub-frame number than approaching, can farthest reduce the waste of transfer of data.
Under fdd mode, the quantity of the present invention by the descending sub frame of configuration back haul link can influence the HARQ timing relationship on the access link greater than the quantity of the sub-frame of uplink of back haul link with minimizing.Descending sub frame feeding back ACK/NACK on the sub-frame of uplink of a back haul link by disposing a plurality of back haul links can save resource.
Aspect that the present invention adds and advantage part in the following description provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Description of drawings
Above-mentioned and/or additional aspect of the present invention and advantage are from obviously and easily understanding becoming the description of embodiment below in conjunction with accompanying drawing, wherein:
Fig. 1 is the frame structure schematic diagram of time division duplex (TDD) pattern in the existing LTE standard;
Fig. 2 is the frame structure schematic diagram of Frequency Division Duplexing (FDD) (FDD) pattern in the existing LTE standard;
Fig. 3 is the block diagram of wireless communication system of the present invention;
Fig. 4 carries out the schematic diagram of back haul link downlink transfer for the present invention utilizes the MBSFN subframe;
Fig. 5 (1) is the repeated link frame structure embodiment schematic diagram of first kind of configuration of the present invention under the tdd frame tactic pattern to Fig. 5 (5);
Fig. 6 (1) is the repeated link frame structure embodiment schematic diagram of the following second kind of configuration of tdd frame tactic pattern of the present invention to Fig. 6 (18);
Fig. 7 (1) is to the repeated link frame structure embodiment schematic diagram of Fig. 7 (7) for the third configuration under the tdd frame tactic pattern of the present invention;
Fig. 8 (1) is to the repeated link frame structure embodiment schematic diagram of Fig. 8 (15) for the 4th kind of configuration under the tdd frame tactic pattern of the present invention;
Fig. 9 is the repeated link frame structure embodiment schematic diagram of the 5th kind of configuration under the tdd frame tactic pattern of the present invention;
Figure 10 is the repeated link frame structure embodiment schematic diagram of symmetrical subframe under the FDD frame structure pattern of the present invention;
Figure 11 is the repeated link frame structure embodiment schematic diagram of asymmetric subframe under the FDD frame structure pattern of the present invention;
Figure 12 is the via node of first embodiment of the invention and the wireless communications method flow chart between the base station; And
Figure 13 is the via node of second embodiment of the invention and the wireless communications method flow chart between the base station.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein identical from start to finish or similar label is represented identical or similar elements or the element with identical or similar functions.Below by the embodiment that is described with reference to the drawings is exemplary, only is used to explain the present invention, and can not be interpreted as limitation of the present invention.
With reference now to Fig. 3,, the figure illustrates the block diagram of wireless communication system of the present invention.
Wireless communication system comprises base station (eNB) 10 and via node (RN) 20, and wherein eNB 10 comprises receiving element 12 and transmitting element 14, and RN 20 comprises sub-frame of uplink dispensing unit 24, descending sub frame dispensing unit 28, transmitting element 22 and receiving element 28.
Frame structure for time division duplex (TDD) pattern, sub-frame of uplink dispensing unit 24 is used for from the frame structure of as shown in Figure 1 time division duplex (TDD) pattern, select at least one sub-frame of uplink to be configured to the sub-frame of uplink of the back haul link (backhaul link) of eNB 10 to RN 20 (eNB-RN), descending sub frame dispensing unit 28 selects at least one descending sub frame to be configured to be used for the descending sub frame of back haul link from the frame structure of described tdd mode.
Certainly, except that selecting as the subframe the uplink and downlink subframe of back haul link, remaining other subframes still keep its original uplink and downlink sub-frame configuration relation in the tdd mode frame structure, promptly are used for the original sub-frame configuration of via node to the access link (access link) of trunk subscriber equipment (RN-relay UE).
Frame structure for Frequency Division Duplexing (FDD) (FDD) pattern, it is the sub-frame of uplink of back haul link that sub-frame of uplink dispensing unit 24 is used for selecting at least one sub-frame configuration from the frame structure of fdd mode, descending sub frame dispensing unit 28 is selected the sub-frame configuration of predetermined quantity from the frame structure of described fdd mode be the descending sub frame of back haul link, wherein has predetermined time-delay between Pei Zhi described sub-frame of uplink and the corresponding descending sub frame.22 sub-frame of uplink by the back haul link of sub-frame of uplink dispensing unit 24 configurations of transmitting element send data to eNB 10, and 26 descending sub frames by the back haul link of descending sub frame dispensing unit 28 configurations of receiving element receive the data that eNB 10 sends.
For eNB 10 ends, its receiving element 12 receives the data of RN 20 by the sub-frame of uplink transmission of back haul link, and transmitting element 14 sends data by the descending sub frame of back haul link to RN 20.
Below, will make detailed description to the sub-frame of uplink dispensing unit 24 of repeated link of the present invention and the concrete work of descending sub frame dispensing unit 28 respectively in conjunction with tdd mode frame structure and fdd mode frame structure.
At first, the frame structure of repeated link under the tdd mode frame structure is configured is described.
Shown in the table 1 of background technology, the frame structure of existing TDD pattern has 7 kinds of different uplink and downlink frame structure configurations.
Because tdd mode subframe { #0, #1, #5, the #6} shown in the table 1, respectively corresponding subframe D, S, D, S are used for synchronous signal transmission and/or call (paging), therefore, preferably, the descending sub frame that is used for back haul link of second dispensing unit, 14 selections does not comprise these subframes.
7 kinds of configurations for the tdd frame structure, do not comprising that preferably subframe is { under the prerequisite of #0, #1, #5, #6}, because the uplink and downlink number of subframes of configuration 0 and configuration 5 is limited, as can be seen from Table 1, wherein dispose 0 and only remain 6 sub-frame of uplink (U), configuration 5 only exists, and therefore can not be used for the design of repeated link frame structure.
The present invention will be based on preferred TDD configuration 1,2,3,4 and 6, provide the frame structure allocation plan of back haul link respectively, comprising the sub-frame of uplink and the descending sub frame of balanced configuration back haul link, and the sub-frame of uplink of asymmetric configuration back haul link and descending sub frame.Hereinafter can provide detailed description after a while.
It is to be noted, the present invention is not limited to the specific embodiment of this preferred version, { #0, #1, #5, #6} can be used for disposing the descending sub frame as back haul link to for example above-mentioned subframe, corresponding, configuration 0 and configuration 5 in the table 1 also can not be subjected to numerical limitations, can be used for the frame structure design of repeated link.
In addition, for relaying (in-band relay) in the band, the backhaul link adopts identical frequency spectrum with the access link.Because the Relay transmitter has interference to the receiver of oneself, descending backhaul link and descending access link are unsuitable for existing simultaneously on same frequency resource.Similarly, up access and up backhaul link also are unsuitable for existing simultaneously.Therefore, in order to remove the interference that exists in the repeated link better, first dispensing unit 12 can be configured to the descending sub frame of back haul link Multicast Broadcast Single Frequency Network (Multicast Broadcast Single Frenquency, MBSFN) subframe, mode by the MBSFN subframe is created gap (gaps) at descending access link in the transmission time, make via node not send data to terminal UE when (eNB) receives data from the base station.Concrete principle is as shown in Figure 4, and in these transmission gaps, terminal comprises R8UE, can not expect to exist any Relay to send.
Now, will be on the basis of above-mentioned preferred version, respectively the frame structure allocation plan of the back haul link of sub-frame of uplink dispensing unit 24 of the present invention and descending sub frame dispensing unit 28 is provided detailed description in conjunction with the accompanying drawings.
Need to prove, below the present invention of Xian Shiing be used for repeated link all frame structures all be via node (RN) frame structure, and wherein on behalf of RN, D be used for inserting the descending sub frame of (access) link, S represents the special subframe in the TDD configuration, and on behalf of RN, U be used for the sub-frame of uplink of access link.
On behalf of RN, M and " ↓ " be used for the subframe (optimally, do not comprise descending sub frame # 0, #1, #5 and the #6 shown in the table 1, and be preferably the MBSFN subframe) of backhaul downlink transfer, and on behalf of RN, " ↓ " receive from eNB; On behalf of RN, U and " ↑ " be used for the subframe of backhaul uplink, and " ↑ " expression RN sends to eNB.
At first, with reference to figure 5 (1) to Fig. 5 (5), these figure show the repeated link frame structure embodiment of first kind of configuration of the present invention (about the configuration 1 of table 1) under the tdd frame tactic pattern respectively.
Show the uplink and downlink subframe symmetry of sub-frame of uplink dispensing unit 24 and descending sub frame dispensing unit 28 configuration backhaul links to Fig. 5 (3) as Fig. 5 (1).Promptly, the quantity of the descending sub frame of configuration backhaul link equals the quantity of the sub-frame of uplink of backhaul link, and the descending sub frame of backhaul link disposes according to mixing automatic repeat requests (HARQ) timing relationship in pairs with the sub-frame of uplink of backhaul link.Wherein the descending backhaul subframe of Fig. 5 (1) and Fig. 5 (2) is 1: 1 with the ratio of up backhaul subframe, and descending access subframe is 5: 3 with the ratio of up access subframe; The descending backhaul subframe of Fig. 5 (3) is 2: 2 with the ratio of up backhaul subframe, and descending access subframe is 4: 2 with the ratio of up access subframe.
Preferably, the ratio of sub-frame of uplink dispensing unit 24 and descending sub frame dispensing unit 28 configuration backhaul descending sub frame quantity and sub-frame of uplink quantity, approaching with the ratio of access descending sub frame quantity and sub-frame of uplink quantity.For example, Fig. 5 (1) and Fig. 5 (2), backhaul uplink and downlink subframe ratio is 1, access uplink and downlink subframe ratio is about 1.7; And among Fig. 5 (3), backhaul uplink and downlink subframe ratio is 1, and access uplink and downlink subframe ratio is about 2.Therefore, among Fig. 5 (1) and Fig. 5 (2), backhaul uplink and downlink subframe ratio and access uplink and downlink subframe ratio are more approaching.Thereby compare Fig. 5 (3), the frame structure among Fig. 5 (1) and Fig. 5 (2) more can not cause the waste of data, and therefore corresponding frame design is more excellent.
Above-mentioned three kinds of configurations can not influence the automatic repeat requests of mixing of access link, and (the HARQ timing relationship on the backhaul link can adopt the timing relationship of R8 standard for Hybrid Automatic Repeat request, HARQ) timing relationship.
In addition, arrive among Fig. 5 (5) the uplink and downlink subframe of sub-frame of uplink dispensing unit 24 and descending sub frame dispensing unit 28 symmetrical arrangements backhaul links at Fig. 5 (4).Preferably, the quantity of the descending sub frame of sub-frame of uplink dispensing unit 24 and descending sub frame dispensing unit 28 configuration backhaul links is greater than the quantity of the sub-frame of uplink of backhaul link, and some descending sub frames of the sub-frame of uplink of backhaul link and backhaul link dispose in pairs according to the HARQ timing relationship.
Show that as Fig. 5 (4) and Fig. 5 (5) descending backhaul subframe is 2: 1 with the ratio of up backhaul subframe, descending access subframe is 4: 3 with the ratio of up access subframe.These the two kinds ascending HARQ timing relationships that dispose on the backhaul link can adopt the timing relationship of R8 standard, and descending timing relationship needs redesign, and these two kinds of configurations can not influence the HARQ timing relationship of access link.
Now, with reference to figure 6 (1) to Fig. 6 (18), these figure show the repeated link frame structure embodiment of second kind of configuration of the present invention (about the configuration 2 of table 1) under the tdd frame tactic pattern respectively.
Show the uplink and downlink subframe symmetry of sub-frame of uplink dispensing unit 24 and descending sub frame dispensing unit 28 configuration backhaul links as Fig. 6 (1) and Fig. 6 (2).Wherein, descending backhaul subframe is 1: 1 with the ratio of up backhaul subframe, and descending access subframe is 7: 1 with the ratio of up access subframe.Illustrate the timing relationship that two kinds of up-downgoing HARQ timing relationships on the configuration backhaul link can adopt the R8 standard.
In addition, arrive among Fig. 6 (18) the uplink and downlink subframe of sub-frame of uplink dispensing unit 24 and descending sub frame dispensing unit 28 symmetrical arrangements backhaul links at Fig. 6 (3).Preferably, the quantity of the descending sub frame of sub-frame of uplink dispensing unit 24 and descending sub frame dispensing unit 28 configuration backhaul links is greater than the quantity of the sub-frame of uplink of backhaul link.
Show that to Fig. 6 (8) descending backhaul subframe is 2: 1 with the ratio of up backhaul subframe as Fig. 6 (3), descending access subframe is 6: 1 with the ratio of up access subframe.
Up-downgoing HARQ timing relationship on the backhaul link of Fig. 6 (5) and Fig. 6 (7) can adopt the timing relationship of R8 standard; The ascending HARQ of Fig. 6 (3) and Fig. 6 (4) regularly can adopt the timing relationship of R8 standard, and descending HARQ regularly need redesign; The up-downgoing HARQ timing relationship of Fig. 6 (6) and Fig. 6 (8) all needs redesign.
Show that to Fig. 6 (16) descending backhaul subframe is 3: 1 with the ratio of up backhaul subframe as Fig. 6 (9), descending access subframe is 5: 1 with the ratio of up access subframe.
Fig. 6 (9), Fig. 6 (11), Fig. 6 (12), Fig. 6 (13), 6 (15) and the backhaul link of Fig. 6 (16) on the ascending HARQ timing relationship can adopt the timing relationship of R8 standard, descending HARQ timing relationship needs redesign; The up-downgoing HARQ timing relationship of Fig. 6 (10) and Fig. 6 (14) all needs redesign.
Show that as Fig. 6 (17) and Fig. 6 (18) descending backhaul subframe is 4: 1 with the ratio of up backhaul subframe, descending access subframe is 4: 1 with the ratio of up access subframe.Illustrate the timing relationship that two kinds of ascending HARQ timing relationships on the configuration backhaul link can adopt the R8 standard, descending HARQ timing relationship needs redesign.
From top about disposing Fig. 6 (1) of 2 as can be known to Fig. 6 (18), in Fig. 6 (17) and 6 (18), sub-frame of uplink dispensing unit 24 and descending sub frame dispensing unit 28 configuration backhaul uplink and downlink subframe ratios (4: 1) are the most approaching with access uplink and downlink subframe ratio (4: 1); Fig. 6 (9) takes second place to 6 (16); Be Fig. 6 (6) and 6 (8) then; Be Fig. 6 (1) and 6 (2) at last.Therefore, according to approaching the putting in order of ratio, then can determine the frame structure preferred sequence that the present invention disposes.
Now, with reference to figure 7 (1) to Fig. 7 (7), these figure show the repeated link frame structure embodiment of the third configuration (about the configuration 3 of table 1) of the present invention under the tdd frame tactic pattern respectively.
For configuration 3, because the access link acknowledgement of subframe # 0/deny that (ACK/NACK) feedback is at subframe # 4, the ACK/NACK feedback of subframe # 1, #5 and #6 is at subframe # 2, in order not influence the HARQ on the access link, sub-frame of uplink dispensing unit 24 according to the descending sub frame sub-frame of uplink corresponding, that be used for the ACK/NACK feedback of backhaul link, collocating uplink backhaul adopts subframe # 3, and the subframe of carrying out the ACK/NACK feedback on subframe # 3 is #7 and #8.
Show the uplink and downlink subframe symmetry of sub-frame of uplink dispensing unit 24 and descending sub frame dispensing unit 28 configuration backhaul links to Fig. 7 (3) as Fig. 7 (1).Descending backhaul subframe is 1: 1 with the ratio of up backhaul subframe, and descending access subframe is 6: 2 with the ratio of up access subframe.For the configuration of Fig. 7 (1) and Fig. 7 (2), the descending HARQ timing relationship on the backhaul link can adopt the timing relationship of R8 standard, and the ascending HARQ timing relationship needs redesign; For the configuration of Fig. 7 (3), the ascending HARQ timing relationship on the backhaul link can adopt the timing relationship of R8 standard, and descending HARQ timing relationship needs redesign.These three kinds of configurations can not influence the HARQ timing relationship on the access link.
In addition, arrive among Fig. 7 (7) the uplink and downlink subframe of sub-frame of uplink dispensing unit 24 and descending sub frame dispensing unit 28 symmetrical arrangements backhaul links at Fig. 7 (4).Preferably, the quantity of the descending sub frame of sub-frame of uplink dispensing unit 24 and descending sub frame dispensing unit 28 configuration backhaul links is greater than the quantity of the sub-frame of uplink of backhaul link.
Show that to Fig. 7 (6) descending backhaul subframe is 2: 1 with the ratio of up backhaul subframe as Fig. 7 (4), descending access subframe is 5: 2 with the ratio of up access subframe.
For the configuration of Fig. 7 (4), the descending HARQ timing relationship on the backhaul link can adopt the timing relationship of R8 standard, and the ascending HARQ timing relationship needs redesign; For the configuration of Fig. 7 (5) and Fig. 7 (6), the ascending HARQ timing relationship on the backhaul link can adopt the timing relationship of R8 standard, and descending HARQ timing relationship needs redesign.These three kinds of configurations can not influence the HARQ timing relationship on the access link.
Show that as Fig. 7 (7) descending backhaul subframe is 3: 1 with the ratio of up backhaul subframe, descending access subframe is 4: 2 with the ratio of up access subframe.For the configuration of Fig. 7 (7), the ascending HARQ timing relationship on the backhaul link can adopt the timing relationship of R8 standard, and descending HARQ timing relationship needs redesign.This configuration can not influence the HARQ timing relationship on the access link.
About disposing Fig. 7 (1) of 3 to Fig. 7 (7) as can be known, Fig. 7 (4) is the most approaching with access uplink and downlink subframe ratio (5: 2) to the configuration backhaul uplink and downlink subframe ratios (2: 1) of Fig. 7 (6) from top; Fig. 7 (7) takes second place; Be that Fig. 7 (1) is to Fig. 7 (3) at last.Therefore, according to approaching the putting in order of ratio, then can determine the frame structure preferred sequence that the present invention disposes.
Now, with reference to figure 8 (1) to Fig. 8 (15), these figure show the repeated link frame structure embodiment of the third configuration (about the configuration 4 of table 1) of the present invention under the tdd frame tactic pattern respectively.
For configuration 4, the ACK/NACK feedback position of subframe # 0, #1 and #5 is all at subframe # 2, the ACK/NACK feedback position of subframe # 6 is at subframe # 3, in order to influence the HARQ timing of access link with minimizing, the sub-frame number of the sub-frame of uplink descending sub frame correspondence of sub-frame of uplink dispensing unit 24 bases and backhaul link, that be used for the ACK/NACK feedback and feedback subframe correspondence, collocating uplink backhaul subframe.Here, because the feedback of corresponding three subframes of subframe # 2, and the feedback of the corresponding subframe of subframe # 3, therefore in order to reduce the access Effect on Performance, sub-frame of uplink dispensing unit 24 preferred disposition subframe # 3 are up backhaul subframe with minimizing.
Show the uplink and downlink subframe symmetry of sub-frame of uplink dispensing unit 24 and descending sub frame dispensing unit 28 configuration backhaul links to Fig. 8 (4) as Fig. 8 (1).Wherein, descending backhaul subframe is 1: 1 with the ratio of up backhaul subframe, and descending access subframe is 7: 1 with the ratio of up access subframe.
For the configuration of Fig. 8 (1), the up-downgoing HARQ timing relationship on the backhaul link all needs redesign; For the configuration of Fig. 8 (2) and Fig. 8 (3), the descending HARQ timing relationship on the backhaul link can adopt the timing relationship of R8 standard, and up timing relationship needs redesign; For the configuration of Fig. 8 (4), the up-downgoing HARQ timing relationship on the backhaul link can adopt the timing relationship of R8 standard.
In addition, arrive among Fig. 8 (15) the uplink and downlink subframe of sub-frame of uplink dispensing unit 24 and descending sub frame dispensing unit 28 symmetrical arrangements backhaul links at Fig. 8 (5).Preferably, the quantity of the descending sub frame of sub-frame of uplink dispensing unit 24 and descending sub frame dispensing unit 28 configuration backhaul links is greater than the quantity of the sub-frame of uplink of backhaul link.
Show that to Fig. 8 (10) descending backhaul subframe is 2: 1 with the ratio of up backhaul subframe as Fig. 8 (5), descending access subframe is 6: 1 with the ratio of up access subframe.
The up-downgoing HARQ timing relationship of the backhaul link of Fig. 8 (5) and Fig. 8 (6) all needs redesign; The ascending HARQ timing relationship of the backhaul link of Fig. 8 (7) can adopt the timing relationship of R8 standard, and descending HARQ timing relationship needs redesign; The descending HARQ timing relationship of the backhaul link of Fig. 8 (8) can adopt the timing relationship of R8 standard, and the ascending HARQ timing relationship needs redesign; The up-downgoing timing relationship of the backhaul link of Fig. 8 (9) and Fig. 8 (10) can adopt the timing relationship of R8 standard.
Show that to Fig. 8 (14) descending backhaul subframe is 3: 1 with the ratio of up backhaul subframe as Fig. 8 (11), descending access subframe is 5: 1 with the ratio of up access subframe.
For the configuration of Fig. 8 (11), the up-downgoing HARQ timing relationship on the backhaul link can adopt the timing relationship of R8 standard; The up-downgoing HARQ of Fig. 8 (12) regularly needs redesign; The ascending HARQ of Fig. 8 (13) and Fig. 8 (14) regularly can adopt R8 standard HARQ regularly, and descending HARQ need redesign.
Show that as Fig. 8 (15) descending backhaul subframe is 4: 1 with the ratio of up backhaul subframe, descending access subframe is 4: 1 with the ratio of up access subframe.For the configuration of Fig. 8 (15), the ascending HARQ timing relationship on the backhaul link can adopt the timing relationship of R8 standard, and descending HARQ timing relationship needs redesign.
About disposing Fig. 8 (1) of 4 to Fig. 8 (15) as can be known, the frame structure preferred sequence of sub-frame of uplink dispensing unit 24 and 28 configurations of descending sub frame dispensing unit be that Fig. 8 (15)＞Fig. 8 (11) arrives Fig. 8 (4) to Fig. 8 (14)＞Fig. 8 (5) to Fig. 8 (10)＞Fig. 8 (1) from top.
Now, make an explanation at the repeated link frame structure configuration of the 5th kind of configuration of the present invention under the tdd frame tactic pattern (about the configuration 6 of table 1).
For the configuration 6 of table 1, { under the prerequisite of #0, #1, #5, #6}, have only descending sub frame # 9 to can be used for the backhaul transmission, the subframe that can be used for up backhaul transmission is { #2, #3, #4, #7, #8} preferably not selecting subframe.Preferably, in order not influence the HARQ timing on the access link, can adopt with 6 radio frames is dynamically to reserve up backhaul subframe the cycle.In 6 radio frames (60ms), the selection that can be used for up backhaul transmission is as shown in table 2:
Table 2
| ??10ms | ??10ms | ??10ms | ??10ms | ??10ms | ??10ms | |
| |
??#2 | ??#3 | ??#4 | ??#7 | ??#8 | ?? |
| Select | ||||||
| 2 | ??#3 | ??#4 | ??#7 | ??#8 | ??N | ??#2 |
| |
??#4 | ??#7 | ??#8 | ??N | ??#2 | ??#3 |
| |
??#7 | ??#8 | ??N | ??#2 | ??#3 | ??#4 |
| |
??#8 | ??N | ??#2 | ??#3 | ??#4 | ??#7 |
| |
??N | ??#2 | ??#3 | ??#4 | ??#7 | ??#8 |
Wherein the N representative is not used in the subframe of up backhaul transmission in the 10ms of correspondence.According to table 2, can select the up backhaul sub-frame configuration of any one or multiple mixing (but being no more than 6 kinds), descending backhaul subframe is configured to subframe # 9 regularly.
Below, Fig. 9 has only provided to select 1 and the embodiment that selects the up backhaul subframe of 2 correspondences to mix.As shown in the figure, in first 10ms, configuration # 2 and #3 are up backhaul subframe; Among second 10ms, configuration # 3, #4 are up backhaul subframe; In the 3rd 10ms, configuration # 4, #7 are up backhaul subframe; In the 4th 10ms, configuration # 7, #8 are up backhaul subframe; Among the 5th 10ms, there is not the subframe that is used for up backhaul in the configuration according to selecting 2 in this 10ms, is up backhaul subframe according to selecting 1 configuration # 8 only therefore; In like manner, in the 6th 10ms, only disposing #2 is up backhaul subframe.
Now, the inking device that the frame structure of repeated link under the fdd mode frame structure is configured is described.
For fdd mode, sub-frame of uplink dispensing unit 24 and descending sub frame dispensing unit 28 can adopt symmetry or asymmetrical mode to dispose uplink and downlink subframe on the backhaul link.
During balanced configuration, the descending sub frame quantity of configuration backhaul link equals the sub-frame of uplink quantity of backhaul link, and the sub-frame of uplink of the descending sub frame of backhaul link and backhaul link disposes in pairs according to the HARQ timing relationship.
Figure 10 has provided the repeated link frame structure embodiment schematic diagram of symmetrical subframe under the FDD frame structure pattern.As shown in figure 10, the subframe #n of FDD, #n+k and #n+k+1 are used for the backhaul downlink transfer, and then Dui Ying subframe #n+k ', #n+k+k ' and #n+k+1+k ' are used for the backhaul uplink.
For fdd mode, in order farthest to reduce performance impact to the access link, sub-frame of uplink dispensing unit 24 and descending sub frame dispensing unit 28 configuration backhaul link sub-frame of uplink respectively and the time-delay between the descending sub frame of paired configuration be preferably 3 subframe lengths, i.e. k '=4.Certainly, the present invention is not limited to this specific embodiment, and in repeated link frame structure of the present invention design, k ' also can be for 5,6 etc. greater than 4 numerical value.
Therefore, for continuous or discrete descending backhaul subframe, all there is unique up backhaul subframe corresponding with it.The descending HARQ timing relationship of this configuration can adopt the HARQ timing relationship of R8 standard.In addition, optimally, the subframe that descending sub frame dispensing unit 28 is selected to be used for backhaul link downlink transfer does not comprise the subframe that is used for synchronous signal transmission and/or call, for example subframe # 0, #4, #5 and the #9 in the FDD frame structure.
The configuration that it is pointed out that Figure 10 only is an illustrative purpose, and the backhaul symmetric design of FDD of the present invention is including but not limited to this specific embodiment.
Figure 11 has provided the repeated link frame structure embodiment schematic diagram of asymmetric subframe under the FDD frame structure pattern of the present invention.When adopting symmetrical arrangements, in order to influence the HARQ timing relationship on the access link with minimizing, preferred sub-frame of uplink dispensing unit 24 and descending sub frame dispensing unit 28 are configured to sub-frame of uplink quantity greater than the backhaul link with the descending sub frame quantity of backhaul link, and some descending sub frames of the sub-frame of uplink of backhaul link and backhaul link dispose in pairs according to the HARQ timing relationship.And in the descending sub frame of a plurality of backhaul links in the sub-frame of uplink of last descending sub frame and a plurality of backhaul links the time-delay between last sub-frame of uplink be 3 subframe lengths.In one embodiment, can dispose descending sub frame feeding back ACK/NACK on the sub-frame of uplink of a backhaul link of a plurality of backhaul links.
For example shown in Figure 11, a plurality of subframes of configuration FDD, for example subframe #n, #n+k, #n+k+1 are used for the backhaul downlink transfer, and then only sub-frame of uplink #n+k+1+k ' is used for the backhaul uplink.And last descending sub frame is 3 subframe lengths, i.e. k '=4 with time-delay between the corresponding sub-frame of uplink in preferred a plurality of descending sub frames.Thereby sub-frame of uplink #n+k ', the #n+k+k ' of corresponding descending backhaul subframe #n, #n+k can leftly be used for the access link transmission, have saved resource.The descending HARQ timing relationship of this configuration needs redesign.
Optimally, under the asymmetric mode, the subframe that descending sub frame dispensing unit 28 is selected to be used for backhaul link downlink transfer does not comprise subframe # 0, #4, #5 and the #9 that is used for synchronous signal transmission and/or call.
The configuration that it is pointed out that Figure 11 only is an illustrative purpose, and the backhaul asymmetric design of FDD of the present invention is including but not limited to this specific embodiment.
In addition, frame structure for above-mentioned tdd mode and fdd mode, on a plurality of continuous sub-frame of uplink and descending sub frame that sub-frame of uplink dispensing unit 24 of the present invention and descending sub frame dispensing unit 28 preferably is configured in the via node frame structure respectively with the sub-frame of uplink and the descending sub frame of backhaul link, thereby can determine the HARQ timing relationship simply and easily, and cause equipment to switch continually.For example, among Fig. 6 (3), Fig. 6 (6), Fig. 8 (11), Fig. 8 embodiment such as (15), be configured in continuously at backhaul link descending sub frame on the sub-frame of uplink of continuous tdd frame structure.
And, whole sub-frame of uplink in a radio frames all are configured to the backhaul link, and the sub-frame of uplink number that causes the sub-frame of uplink that is not used in ACK/NACK, 24 of sub-frame of uplink dispensing units to be configured in to be used for the backhaul link in the radio frames is less than the sub-frame of uplink number in this radio frames.
With reference now to Figure 12,, this figure is the via node RN of first embodiment of the invention and the wireless communications method flow chart between the base station.
As shown in the figure, this wireless communications method may further comprise the steps: RN selects at least one sub-frame of uplink to be configured to the sub-frame of uplink of RN to the back haul link of base station from the frame structure of TDD pattern, and selects at least one descending sub frame to be configured to the descending sub frame (step 102) of described back haul link; RN sends data (step 104) by the sub-frame of uplink of described back haul link to described base station; And RN receives the data (step 106) of described base station transmission by the descending sub frame of described back haul link.
Here, except that selecting as the subframe the uplink and downlink subframe of back haul link, remaining other subframes still keep its original uplink and downlink sub-frame configuration relation in the tdd mode frame structure, promptly are used for the original sub-frame configuration of via node to the access link (access link) of trunk subscriber equipment (RN-relay UE).
Under the tdd mode frame structure in the wireless communications method, can symmetry or the sub-frame of uplink and the descending sub frame of asymmetric configuration backhaul link.In balanced configuration, the quantity of the descending sub frame of configuration backhaul link equals the quantity of the sub-frame of uplink of backhaul link, and the sub-frame of uplink of the descending sub frame of backhaul link and backhaul link disposes in pairs according to the HARQ timing relationship.In one embodiment, in asymmetric configuration, the quantity of descending sub frame that can dispose the backhaul link is greater than the quantity of the sub-frame of uplink of backhaul link, and some descending sub frames of the sub-frame of uplink of backhaul link and backhaul link dispose in pairs according to the HARQ timing relationship.
In addition, in order to reduce the waste that causes data, in symmetry and asymmetrical backhaul link sub-frame configuration, the descending sub frame quantity of preferred disposition backhaul link and the ratio of sub-frame of uplink quantity, approaching with other ratio that is used for inserting the descending sub frame quantity of (access) link and sub-frame of uplink quantity in the frame structure of tdd mode.According to approaching the putting in order of ratio, then can determine the frame structure preferred sequence that the present invention disposes.
And, in order to remove the interference that exists in the repeated link better, the descending sub frame of backhaul link can be configured to the MBSFN subframe, mode by the MBSFN subframe is created gap (gaps) at descending access link in the transmission time, make via node not send data to terminal UE when (eNB) receives data from the base station.Concrete principle is as shown in Figure 4.
In addition, at the descending sub frame of selecting that is used for the backhaul link, do not comprise that preferably { #0, #1, #5, #6} promptly are used for the subframe of synchronous signal transmission and/or call (paging) respectively to the tdd mode subframe shown in the table 1.
For 7 kinds of configurations of tdd frame structure, do not comprising that preferably subframe { under the prerequisite of #0, #1, #5, #6}, because the uplink and downlink number of subframes of configuration 0 and configuration 5 is limited, therefore can not be used for the design of repeated link frame structure.
The RN repeated link of wireless communications method of the present invention is configured on the basis based on preferred TDD configuration 1,2,3,4 and 6, provide the various allocation plan embodiment of frame structure of the via node link of RN respectively, specifically can be with reference to structure and the respective description of figure 5-9.
Need, be pointed out that, the frame structure allocation plan of the via node link that the present invention provides is not all influencing or is reducing as much as possible on the basis that the HARQ timing relationship on the access link is influenced and realize.
Therefore, on this basis, the present invention is also in conjunction with concrete configuration structure, for example the configuration 3 of table 1 and configuration 4, according to sub-frame of uplink descending sub frame, that be used for the ACK/NACK feedback of HARQ timing relationship and corresponding backhaul link, the sub-frame of uplink of the backhaul link of concrete configuration correspondence.
With reference now to Figure 13,, this figure is the wireless communications method flow chart of second embodiment of the invention (under the FDD frame structure pattern).
As shown in the figure, this method may further comprise the steps: RN selects at least one sub-frame configuration from the frame structure of FDD pattern be the sub-frame of uplink of RN to the back haul link of base station, and to select at least one sub-frame configuration be the descending sub frame of described back haul link; (step 202), the sub-frame of uplink of described RN by described back haul link sends data and the descending sub frame by described back haul link receives the data that described base station sends to described base station; (step 204), the described base station sub-frame of uplink by described back haul link receives data that described RN sends and the descending sub frame by described back haul link to described RN transmission data (step 206).
For fdd mode, the upper and lower sub-frame configuration of step 202 can adopt symmetry or asymmetrical mode to dispose uplink and downlink subframe on the backhaul link.In balanced configuration, the quantity of the descending sub frame of configuration backhaul link equals the quantity of the sub-frame of uplink of backhaul link, and the sub-frame of uplink of the descending sub frame of backhaul link and backhaul link disposes in pairs according to the HARQ timing relationship.In asymmetric configuration, the quantity of descending sub frame that can dispose the backhaul link is greater than the quantity of the sub-frame of uplink of backhaul link, and some descending sub frames of the sub-frame of uplink of backhaul link and backhaul link dispose in pairs according to the HARQ timing relationship.
In order farthest to reduce performance impact to the access link, can dispose backhaul link sub-frame of uplink respectively and the time-delay between the descending sub frame of paired configuration be preferably 3 subframe lengths.Certainly, the present invention is not limited to this specific embodiment, in repeated link frame structure design of the present invention, also can have the subframe lengths greater than 3 between the corresponding uplink and downlink subframe of backhaul link.
When adopting symmetrical arrangements,, preferably the descending sub frame quantity of backhaul link is configured to sub-frame of uplink quantity greater than the backhaul link in order to influence the HARQ timing relationship on the access link with minimizing.In the descending sub frame of a plurality of backhaul links in the sub-frame of uplink of last descending sub frame and a plurality of backhaul links the time-delay between last sub-frame of uplink be 3 subframe lengths.In one embodiment, can dispose descending sub frame feeding back ACK/NACK on the sub-frame of uplink of a backhaul link of a plurality of backhaul links.In this case, last descending sub frame is 3 subframe lengths with time-delay between the corresponding sub-frame of uplink in preferred a plurality of descending sub frame.Thereby remaining sub-frame of uplink can be used for the access link transmission, saves resource.
Under symmetric pattern or asymmetric mode, optimally, the subframe of the selected backhaul of being used for link downlink transfer does not comprise subframe # 0, #4, #5 and the #9 that is used for synchronous signal transmission and/or call.
Repeated link frame structure embodiment about FDD frame structure pattern configurations of the present invention can repeat no more here with reference to Figure 10 and Figure 11.
Equally, on a plurality of continuous sub-frame of uplink and descending sub frame that the present invention preferably is configured in the via node frame structure respectively with the sub-frame of uplink and the descending sub frame of backhaul link, thereby can determine the HARQ timing relationship simply and easily, and cause equipment to switch continually.Whole sub-frame of uplink in a radio frames all are configured to the backhaul link, and cause the sub-frame of uplink that is not used in ACK/NACK, then be configured in be used for the backhaul link in the radio frames the sub-frame of uplink number less than the sub-frame of uplink number in this radio frames.
Although illustrated and described embodiments of the invention, for the ordinary skill in the art, be appreciated that without departing from the principles and spirit of the present invention and can carry out multiple variation, modification, replacement and modification that scope of the present invention is by claims and be equal to and limit to these embodiment.
Claims (41)
1. a wireless communications method is characterized in that, described wireless communications method may further comprise the steps:
Via node RN selects at least one sub-frame of uplink to be configured to the sub-frame of uplink of described RN to the back haul link of base station from the frame structure of TDD pattern, and selects at least one descending sub frame to be configured to the descending sub frame of described back haul link;
The sub-frame of uplink of described RN by described back haul link sends data and the descending sub frame by described back haul link receives the data that described base station sends to described base station;
The sub-frame of uplink of described base station by described back haul link receives data that described RN sends and the descending sub frame by described back haul link to described RN transmission data.
2. wireless communications method as claimed in claim 1 is characterized in that, the descending sub frame balanced configuration of the sub-frame of uplink of described back haul link and described back haul link.
3. wireless communications method as claimed in claim 2, it is characterized in that, the quantity of the descending sub frame of described back haul link equals the quantity of the sub-frame of uplink of described back haul link, and the descending sub frame of described back haul link disposes according to mixing automatic repeat requests HARQ timing relationship in pairs with the sub-frame of uplink of back haul link.
4. wireless communications method as claimed in claim 2, it is characterized in that, the ratio of the descending sub frame quantity of described back haul link and the sub-frame of uplink quantity of described back haul link is with to be used for described RN in the frame structure of described tdd mode approaching to the ratio of the descending sub frame quantity of the access link of user equipment (UE) and sub-frame of uplink quantity.
5. wireless communications method as claimed in claim 1 is characterized in that, the sub-frame of uplink of described back haul link and the asymmetric configuration of the descending sub frame of described back haul link.
6. wireless communications method as claimed in claim 5, it is characterized in that, the quantity of the descending sub frame of described back haul link is greater than the quantity of the sub-frame of uplink of described back haul link, and some descending sub frames of the sub-frame of uplink of described back haul link and back haul link dispose in pairs according to the HARQ timing relationship.
7. wireless communications method as claimed in claim 6, it is characterized in that, the ratio of the descending sub frame quantity of described back haul link and the sub-frame of uplink quantity of described back haul link is with to be used for via node in the frame structure of described tdd mode approaching to the ratio of the descending sub frame quantity of the access link of subscriber equipment and sub-frame of uplink quantity.
8. wireless communications method as claimed in claim 1 is characterized in that, described RN disposes the sub-frame of uplink of described back haul link according to the sub-frame of uplink that is used to confirm/deny the ACK/NACK feedback of the descending sub frame of HARQ timing relationship and corresponding described back haul link.
9. wireless communications method as claimed in claim 1, the sub-frame of uplink of described back haul link and descending sub frame are configured in respectively on a plurality of continuous sub-frame of uplink and descending sub frame of frame structure of described tdd mode, and the sub-frame of uplink number that is used for back haul link in a radio frames is less than the sub-frame of uplink number in this radio frames.
10. as the wherein any described wireless communications method of claim 1 to 9, it is characterized in that the descending sub frame of described selection does not comprise the subframe that is used for synchronous signal transmission and/or call.
11. a wireless communications method is characterized in that, described wireless communications method may further comprise the steps:
Via node RN selects at least one sub-frame configuration from the frame structure of FDD pattern be the sub-frame of uplink of described RN to the back haul link of base station, and to select at least one sub-frame configuration be the descending sub frame of described back haul link;
The sub-frame of uplink of described RN by described back haul link sends data and the descending sub frame by described back haul link receives the data that described base station sends to described base station; The sub-frame of uplink of described base station by described back haul link receives data that described RN sends and the descending sub frame by described back haul link to described RN transmission data.
12. wireless communications method as claimed in claim 11 is characterized in that, the descending sub frame balanced configuration of the sub-frame of uplink of described back haul link and described back haul link.
13. wireless communications method as claimed in claim 12, it is characterized in that, the descending sub frame quantity of described back haul link equals the sub-frame of uplink quantity of described back haul link, and the sub-frame of uplink of the descending sub frame of described back haul link and back haul link disposes in pairs according to the HARQ timing relationship.
14. wireless communications method as claimed in claim 13 is characterized in that, described sub-frame of uplink respectively and the time-delay between the descending sub frame of paired configuration be 3 subframe lengths.
15. wireless communications method as claimed in claim 11 is characterized in that, the sub-frame of uplink of described back haul link and the asymmetric configuration of the descending sub frame of described back haul link.
16. wireless communications method as claimed in claim 15, it is characterized in that, the descending sub frame quantity of described back haul link is greater than the sub-frame of uplink quantity of described back haul link, and some descending sub frames of the sub-frame of uplink of described back haul link and back haul link dispose in pairs according to the HARQ timing relationship.
17. wireless communications method as claimed in claim 16 is characterized in that, the descending sub frame of a plurality of described back haul links is feedback acknowledgment/deny ACK/NACK on the sub-frame of uplink of a described back haul link.
18. wireless communications method as claimed in claim 16, it is characterized in that, in the descending sub frame of described a plurality of back haul links in the sub-frame of uplink of last descending sub frame and described a plurality of back haul links the time-delay between last sub-frame of uplink be 3 subframe lengths.
19. wireless communications method as claimed in claim 11, the sub-frame of uplink of described back haul link and descending sub frame are configured in respectively on a plurality of continuous sub-frame of uplink and descending sub frame of frame structure of described fdd mode, and the sub-frame of uplink number that is used for back haul link in a radio frames is less than the sub-frame of uplink number in this radio frames.
20., it is characterized in that the described subframe that described RN selects to be configured to described back haul link descending sub frame does not comprise the subframe that is used for synchronous signal transmission and/or call as claim 11 to 19 any one described wireless communications method wherein.
21. a wireless communication system is characterized in that described wireless communication system comprises via node RN and base station,
Described RN selects at least one sub-frame of uplink to be configured to the sub-frame of uplink of described RN to the back haul link of described base station from the frame structure of TDD pattern, and selects at least one descending sub frame to be configured to the descending sub frame of described back haul link; Sub-frame of uplink by described back haul link sends data to described base station; And the data that receive the transmission of described base station by the descending sub frame of described back haul link;
Described base station, the descending sub frame by described back haul link sends data to described RN; And the data that receive described RN transmission by the sub-frame of uplink of described back haul link.
22. wireless communication system as claimed in claim 21 is characterized in that, the sub-frame of uplink of the described back haul link of described RN balanced configuration and the descending sub frame of described back haul link.
23. wireless communication system as claimed in claim 22, it is characterized in that, the quantity that described RN disposes the descending sub frame of described back haul link equals the quantity of the sub-frame of uplink of described back haul link, and the descending sub frame of described back haul link disposes according to mixing automatic repeat requests HARQ timing relationship in pairs with the sub-frame of uplink of back haul link.
24. wireless communication system as claimed in claim 22, it is characterized in that, described RN disposes the ratio of the sub-frame of uplink quantity of the descending sub frame quantity of described back haul link and described back haul link, with to be used for described RN in the frame structure of described tdd mode approaching to the ratio of the descending sub frame quantity of the access link of subscriber equipment and sub-frame of uplink quantity.
25. wireless communication system as claimed in claim 21 is characterized in that, the sub-frame of uplink of the described back haul link of the asymmetric configuration of described RN and the descending sub frame of described back haul link.
26. wireless communication system as claimed in claim 25, it is characterized in that, described RN disposes the quantity of descending sub frame of described back haul link greater than the quantity of the sub-frame of uplink of described back haul link, and some descending sub frames of the sub-frame of uplink of described back haul link and back haul link dispose in pairs according to the HARQ timing relationship.
27. wireless communication system as claimed in claim 25, it is characterized in that, described RN disposes the ratio of the sub-frame of uplink quantity of the descending sub frame quantity of described back haul link and described back haul link, with to be used for via node in the frame structure of described tdd mode approaching to the ratio of the descending sub frame quantity of the access link of subscriber equipment and sub-frame of uplink quantity.
28. wireless communication system as claimed in claim 21, it is characterized in that, described RN disposes the sub-frame of uplink of described back haul link according to the sub-frame of uplink that is used to confirm/deny the ACK/NACK feedback of the descending sub frame of HARQ timing relationship and corresponding described back haul link.
29. wireless communication system as claimed in claim 21, on a plurality of continuous sub-frame of uplink and descending sub frame of the frame structure that described RN is configured in described tdd mode respectively with the sub-frame of uplink and the descending sub frame of described back haul link, and the sub-frame of uplink number that is used for back haul link in a radio frames is less than the sub-frame of uplink number in this radio frames.
30., it is characterized in that the described descending sub frame that described RN selects does not comprise the subframe that is used for synchronous signal transmission and/or call as the wherein any described wireless communication system of claim 21 to 29.
31. a wireless communication system is characterized in that described wireless communication system comprises via node RN and base station,
Described RN, selecting at least one sub-frame configuration from the frame structure of time division duplex fdd mode is the sub-frame of uplink of described RN to the back haul link of described base station, and to select at least one sub-frame configuration be the descending sub frame of described back haul link; Sub-frame of uplink by described back haul link sends data to described base station; And the data that receive the transmission of described base station by the descending sub frame of described back haul link;
Described base station, the descending sub frame by described back haul link sends data to described RN; And the data that receive described RN transmission by the sub-frame of uplink of described back haul link.
32. wireless communication system as claimed in claim 31 is characterized in that, the sub-frame of uplink of the described back haul link of described RN balanced configuration and the descending sub frame of described back haul link.
33. wireless communication system as claimed in claim 32, it is characterized in that, the descending sub frame quantity that described RN disposes described back haul link equals the sub-frame of uplink quantity of described back haul link, and the descending sub frame of described back haul link and the sub-frame of uplink of back haul link dispose in pairs according to the HARQ timing relationship, described sub-frame of uplink respectively and the time-delay between the descending sub frame of paired configuration be 3 subframe lengths.
34. wireless communication system as claimed in claim 31 is characterized in that, the sub-frame of uplink of the described back haul link of the asymmetric configuration of described RN and the descending sub frame of described back haul link.
35. wireless communication system as claimed in claim 34, it is characterized in that, described RN disposes the sub-frame of uplink quantity of the descending sub frame quantity of described back haul link greater than described back haul link, and some descending sub frames of the sub-frame of uplink of described back haul link and back haul link dispose in pairs according to the HARQ timing relationship.
36. frame structure inking device as claimed in claim 35, it is characterized in that the descending sub frame that described first dispensing unit and described second dispensing unit dispose a plurality of described back haul links is feedback acknowledgment/deny ACK/NACK on the sub-frame of uplink of a described back haul link.
37. wireless communication system as claimed in claim 35, it is characterized in that, in the descending sub frame of described a plurality of back haul links in the sub-frame of uplink of last descending sub frame and described a plurality of back haul links the time-delay between last sub-frame of uplink be 3 subframe lengths.
38. wireless communication system as claimed in claim 31, on the sub-frame of uplink of the back haul link of described RN configuration and a plurality of continuous sub-frame of uplink and descending sub frame of the frame structure that descending sub frame is configured in described fdd mode respectively, and the sub-frame of uplink number of the back haul link that first dispensing unit disposes in a radio frames is less than the sub-frame of uplink number in this radio frames.
39., it is characterized in that the described subframe that described RN selects does not comprise the subframe that is used for synchronous signal transmission and/or call as claim 31 to 38 any one described wireless communication system wherein.
40. a via node is characterized in that, comprises sub-frame of uplink dispensing unit, descending sub frame dispensing unit, transmitting element and receiving element,
Described sub-frame of uplink dispensing unit, selecting at least one sub-frame of uplink or select at least one sub-frame configuration from the frame structure of TDD pattern from the frame structure of FDD pattern is the sub-frame of uplink of described via node to the back haul link of base station;
Described descending sub frame dispensing unit, selecting at least one descending sub frame or select at least one sub-frame configuration from the frame structure of described tdd mode from the frame structure of described fdd mode is the descending sub frame of described via node to the back haul link of base station;
Described transmitting element, the sub-frame of uplink by described back haul link sends data to the base station;
Described receiving element, the descending sub frame by described back haul link receives the data that the base station sends.
41. a base station is characterized in that, comprises receiving element and transmitting element,
Described receiving element, receive via node by the data of via node to the sub-frame of uplink transmission of the back haul link of base station, the sub-frame of uplink of wherein said back haul link is selected at least one sub-frame of uplink by via node or select at least one sub-frame configuration from the frame structure of FDD pattern from the frame structure of TDD pattern;
Described transmitting element, descending sub frame by back haul link sends data to via node, and the descending sub frame of wherein said back haul link is selected at least one descending sub frame by via node or select at least one sub-frame configuration from the frame structure of FDD pattern from the frame structure of TDD pattern.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910082699 CN101873630B (en) | 2009-04-24 | 2009-04-24 | Wireless communication method, system and device thereof |
| EP10766629.9A EP2424288B1 (en) | 2009-04-24 | 2010-04-20 | Method, device and system for backhaul link communication in tdd system |
| US13/265,899 US9118466B2 (en) | 2009-04-24 | 2010-04-20 | Method, device and system for backhaul link communication in a TDD system |
| PCT/CN2010/071924 WO2010121539A1 (en) | 2009-04-24 | 2010-04-20 | Method, device and system for backhaul link communication in tdd system |
| KR20117028088A KR101412051B1 (en) | 2009-04-24 | 2010-04-20 | Method, device and system for backhaul link communication in tdd system |
| JP2012506322A JP5393875B2 (en) | 2009-04-24 | 2010-04-20 | TDD system backhaul link communication method, device and system |
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| CN 200910082699 CN101873630B (en) | 2009-04-24 | 2009-04-24 | Wireless communication method, system and device thereof |
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| CN101873630A true CN101873630A (en) | 2010-10-27 |
| CN101873630B CN101873630B (en) | 2013-04-03 |
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| CN 200910082699 Active CN101873630B (en) | 2009-04-24 | 2009-04-24 | Wireless communication method, system and device thereof |
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