Embodiment
After embodiment of the invention relay node equipment receives the first uplink scheduling information of base station transmission by subframe n, determine that subframe n k1 subframe afterwards is used for the uplink of back haul link; Relay node equipment according to the first uplink scheduling information by k1 subframe after the subframe n, on back haul link to base station transmission upstream data; Wherein, k1 subframe and subframe m k2 subframe afterwards after the subframe n are not same subframes, m 〉=0, n 〉=0, and m and n be integer, k1 and k2 are positive integer and k1>k2; Subframe m is relay node equipment sends subframe from the second uplink scheduling information to user terminal; K2 subframe after the subframe m is relay node equipment receives the upstream data of user terminal according to the second uplink scheduling information subframe.Owing to adopt the dynamic dispatching mode to determine the sub-frame of uplink of back haul link, thereby can avoid RN equipment in same subframe, both to send data to eNB, receive again the situation from the data of UE.
Wherein, the first uplink information is uplink scheduling information and/or R-PHICH (physical mixed HARQ information channel, R-represent that this channel is used for relay node equipment) (R-PHICH is used for transferring ACK/NACK feedback).
If the base station is after the first subframe sends uplink scheduling information, the upstream data that receives RN equipment in the second subframe is wrong, then sends NACK in the first subframe, and is corresponding, and RN equipment can be retransmitted upstream data in next the second subframe;
The base station is correct at the upstream data that the second subframe receives RN equipment, then sends ACK in the first subframe.If also need to dispatch RN equipment, then the base station can send uplink scheduling information when sending ACK, also can send uplink scheduling information in next the first subframe.
The second uplink information is identical with the first uplink information, is uplink scheduling information and/or PHICH.
RN equipment sends subframe and the R-PHICH of uplink scheduling information by a subframe (supposing it is subframe x), if PHICH transmission NACK feedback, user terminal retransmits upstream data with k subframe after x subframe, if PHICH transferring ACK feedback, user terminal will detect the uplink scheduling information among the PDCCH, send new upstream data bag according to k the subframe of uplink scheduling information after x subframe.
Wherein, what x represented is the numbering of a subframe in the radio frames, and k is the number of subframe.
The time span of a subframe of time span between k the subframe after subframe x and the subframe x=(k-1) *, namely scheduling of user terminals regularly length be the time span that sends in the access link between the subframe of the subframe of uplink information and transmission upstream data.
If x+k is greater than 9, illustrate that then x+k subframe is a subframe in the follow-up radio frames, 8 such as x, illustrate that this subframe is the 8th subframe in the radio frames, be subframe 7, k=5, then x+k=13, illustrate that x subframe k subframe afterwards is the 3rd subframe in the next radio frames, namely subframe 2.
The implication of the follow-up n that mentions and m and x is similar, and the implication of k1, k2, k3 and k4 and k is similar, repeats no more.
Under fdd mode, k=4.
Under the tdd mode, the field (half-frame) that two 5ms are arranged in the radio frames of a 10ms, each field comprises again the subframe (subframe) of 5 1ms, a common subframe can be divided into the common time slot (slot) of two 0.5ms, a special subframe (S) is by 3 special time slot DwPTS, and GP and UpPTS form.Two 5ms fields in radio frames can be two identical half frame structures as shown in Figure 1, namely 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 in addition the utilance of Radio Resource and the compatibility of different frame structure, two 5ms fields also can be different frame structures, only have 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, i.e. frame structure take 10ms as the cycle, 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 structure configurations as table 1A:
Table 1A
Accordingly, the k value is relevant with uplink-downlink configuration, and ascending HARQ (Hybrid Automatic RepeatreQuest, hybrid automatic retransmission request) timing relationship is specifically referring to table 1B:
Table 1B
1B can find out from table:
In configuration 1, during x=1, k=6, namely user terminal receives uplink information in subframe 1, sends upstream data in subframe 7.Other configuring condition is similar, repeats no more.
For TDD configuration 0, multiframe scheduling situation can appear.Corresponding to table 1B, subframe 3 and 4 ACK/NACK feedback be in the PHICH of subframe 0 transmission, and subframe 8 and 9 ACK/NACK feedback are in the PHICH of subframe 5 transmission.Subframe 0 and subframe 5 will be dispatched respectively two subframes, subframe 0 scheduling subframe 4 and subframe 7, and subframe 5 scheduling subframe 9 and subframes 2, simultaneously, the scheduling of subframe 1 and subframe 6 relation will be changed into x+7, and namely subframe 1 is dispatched subframe 8, subframe 6 scheduling subframes 3.
Descending HARQ timing relationship is specifically referring to table 1C:
Table 1C
If subframe n be table shown in the 1B can the dispatching uplink subframe subframe, its subframe that can dispatch is according to shown in the table 1B; If subframe n be can not the dispatching uplink subframe among the table 1B subframe, in this patent, its subframe that can dispatch is: n sends PDSCH, sends the sub-frame of uplink that ACK/NACK that should PDSCH is fed back.
That is to say, in the embodiment of the invention, if subframe n be table shown in the 1B can the dispatching uplink subframe subframe, then k2 determines according to table 1B; Otherwise k2 determines according to table 1C.
Below in conjunction with Figure of description the embodiment of the invention is described in further detail.
As shown in Figure 2, the system of embodiment of the invention transmission upstream data comprises: base station 10 and relay node equipment 20.
Base station 10 is used for sending the first uplink information by subframe n.
Relay node equipment 20, after being used for the first uplink information by subframe n reception base station 10, determine that subframe n k1 subframe afterwards is used for the uplink of back haul link, according to the first uplink scheduling information by k1 subframe after the subframe n, on back haul link to base station transmission upstream data.
The first uplink scheduling information has comprised uplink scheduling order and/or PHICH, if PHICH is NACK, via node will be according to the rules the upstream data that retransmits of timed sending, if PHICH is ACK, will according to the uplink scheduling order be scheduled subframe in send new upstream data.
Wherein, k1 subframe and subframe m k2 subframe afterwards after the subframe n are not same subframes, m 〉=0, n 〉=0, and m and n be integer, k1 and k2 are positive integer and k1>k2;
Subframe m is relay node equipment sends subframe from the second uplink scheduling information to user terminal;
K2 subframe after the subframe m is relay node equipment 20 receives the upstream data of user terminal according to the second uplink scheduling information subframe.
In specific implementation process, base station 10 sends before the first uplink information, sends the backhaul link configuration information to relay node equipment.
Wherein, the back haul link configuration information is used for the descending sub frame of semi-static configuration back haul link transmission, the inside has comprised the positional information that can be configured to downlink subframes in return link, and relay node equipment is configured to the MBSFN subframe according to this information with the descending sub frame of correspondence.
Accordingly, relay node equipment 20 is according to the back haul link configuration information of the base station 10 of receiving, be identified for the descending sub frame n of back haul link transmission, and with the descending sub frame determined as Multicast Broadcast Single Frequency Network MBSFN (MBSFN Multicast Broadcast Single Frequency Network, Multicast Broadcast Single Frequency Network) subframe.
For fear of the interference to receiver of the transmitter of relay node equipment, guarantee that simultaneously via node can send uplink scheduling order and PHICH on access link, need to be configured to the MBSFN subframe.
Concrete, relay node equipment is used for the descending transmission of access link with the previous of subframe or the first two OFDM symbol, and other symbols are used for the descending reception (when antenna port is 1 or 2, using previous symbol, is, uses the first two symbol) of back haul link at 4 o'clock.
As shown in Figure 3, embodiment of the invention relay node equipment comprises: determination module 100 and sending module 110.
Determination module 100 behind the first uplink scheduling information that is used for sending by subframe n reception base station, determines that subframe n k1 subframe (being subframe n+k1) afterwards is used for the uplink of back haul link.
Sending module 110 is used for according to the first uplink scheduling information by k1 subframe after the subframe n, on back haul link to base station transmission upstream data.
Wherein, k1 subframe and subframe m k2 subframe afterwards after the subframe n are not same subframes, m 〉=0, n 〉=0, and m and n be integer, k1 and k2 are positive integer and k1>k2;
Subframe m is relay node equipment sends subframe from the second uplink scheduling information to user terminal;
K2 subframe after the subframe m is relay node equipment receives the upstream data of user terminal according to the second uplink scheduling information subframe.
In specific implementation process, determination module 100 can be determined first k1 subframe after the subframe n, and then determines to send to user terminal the subframe (being subframe m) of the second uplink information, and such as k2=4, in the radio frames, subframe n is subframe 0; Suppose determination module 100 definite k1=8, then k1 subframe after the subframe n is subframe 7, because k2=4, so relay node equipment can not send the second uplink information to user terminal by subframe 3.
If relay node equipment sends the second uplink information by subframe 3 to user terminal, be that subframe m is subframe 3, then k2 subframe after the subframe m is subframe 7, and obviously k1 subframe after the subframe n and subframe m k2 subframe afterwards are same subframes, so not all right.
Determination module 100 can also determine first to send to user terminal the subframe (being subframe m) of the second uplink information, and then k1 subframe after definite subframe n, and such as k2=4, in the radio frames, subframe n is subframe 0; Suppose that m is subframe 2 in the subframe, then k2 subframe after the subframe m is subframe 6, so k1 ≠ 6, namely relay node equipment can not send the second uplink information to user terminal by subframe 6.
If k1=6, then k1 subframe after the subframe n and subframe m k2 subframe afterwards are same subframes, so not all right.
Concrete which kind of mode that adopts can be set as required.
A kind of better mode, it is minimum to allow time delay between k1 the subframe after subframe n and the subframe n satisfy demand and the time delay of demodulation signaling, and then determination module 100 determines that k1 subframe after the subframe n is subframe n first sub-frame of uplink afterwards.
In specific implementation process, if when n gets a plurality of value simultaneously, the sub-frame of uplink of its scheduling is different; Value is different constantly if n is in difference, and the sub-frame of uplink of its scheduling can be identical, such as Fig. 4 B.
Concrete, when having simultaneously a plurality of descending sub frame n for the back haul link transmission, k1 subframe after each subframe n is different subframes.0 and 1 such as the n value, be after relay node equipment is received two the first uplink informations by subframe 0 and subframe 1 respectively, determination module 100 is determined subframe 0 corresponding subframe 8 (being subframe 0 the 8th subframe afterwards), then determination module 100 determines that the subframe of subframe 1 correspondence can only be other subframes (being k1 ≠ 7) except subframe 8, such as subframe 9.
Can guarantee that so same sub-frame of uplink do not dispatched by a plurality of descending sub frames, avoid scheduling resource conflict (if dispatched by a plurality of descending sub frames, may cause the scheduling resource conflict).
If relay node equipment in fdd mode, k2=4, then k1-4 subframe after subframe m and the subframe n is different subframes;
If relay node equipment is in tdd mode, then the value of k2 adopts LTE (Long TermEvolution, Long Term Evolution) value of HARQ timing relationship regulation in the technical specification (being 3GPP TS 36.213), scheduling subframe n k1 the subframe afterwards of then stipulating in subframe m and the LTE technical specification are different subframes.
The below is applied in fdd mode take relay node equipment and is elaborated as example.
Shown in Fig. 4 A, in the timing relationship schematic diagram one of embodiment of the invention FDD system, at access link, relay node equipment sends upstream data at subframe 1 scheduling user terminal in subframe 5; At back haul link, relay node equipment receives the first uplink information that the base station sends in subframe 1, because user terminal can send upstream data in subframe 5, so relay node equipment is chosen in subframe 6 and sends corresponding upstream data to the base station, and relay node equipment can send the second uplink information to user terminal in subframe 2.
Shown in Fig. 4 B, in the timing relationship schematic diagram two of embodiment of the invention FDD system, at access link, relay node equipment sends upstream data at subframe 1 scheduling UE in subframe 5; At back haul link, relay node equipment receives the first uplink information that the base station sends in subframe 1 or subframe 2, because user terminal can send upstream data in subframe 5, so relay node equipment is chosen in subframe 7 and sends corresponding upstream data to the base station, and relay node equipment can send the second uplink information to user terminal in subframe 3.
The below is applied in tdd mode take relay node equipment and is elaborated as example.Because different configuration in the tdd mode, regularly length is not identical for scheduling of user terminals, so according to configuration feature, will dispose 0~7 and be divided into 3 kinds of modes and describe.
Mode one, configuration 0.
Owing in configuration 0, have the situation (being subframe 0 and subframe 5) of two subframes of a subframe scheduling, accordingly, k2 subframe and k3 the subframe upstream data that receive user terminal of relay node equipment after the subframe m that sends the second uplink scheduling information to user terminal, then determination module 100 is when subframe n is subframe 0 or subframe 5, after determining subframe n k1 subframe afterwards, sending module 110 sends before the upstream data, determines subframe n k4 subframe afterwards.
Wherein, k3 and k4 are positive integer and k1 ≠ k3 ≠ k4; Value minimum among k1 and the k4 is greater than value maximum among k2 and the k3, and k1 subframe after the subframe n is not same subframe with k3 subframe after the subframe m, and subframe n k4 subframe and subframe m k2 subframe and k3 subframe afterwards afterwards is not same subframe.
Accordingly, sending module 110 sends upstream data by k1 subframe and k4 subframe after the subframe n to the base station.
Minimum for the demand and the time delay that allow k1 subframe after subframe n and the subframe n and the time delay between k4 the subframe after subframe n and the subframe n satisfy the demodulation signaling, then the subframe n that determines of determination module 100 k1 subframe and k4 subframe afterwards is respectively first sub-frame of uplink and second sub-frame of uplink after subframe n k5 the subframe afterwards;
Wherein the value of k5 equals value maximum among k2 and the k3.
Concrete, for tdd mode configuration 0, can there be the multiframe scheduling.In the LTE technical specification, subframe 0 scheduling subframe 4 and subframe 7, subframe 1 scheduling subframe 8, subframe 5 scheduling subframe 9 and subframes 2, subframe 6 scheduling subframes 3, access link adopts above-mentioned scheduling timing relation.At back haul link, for fear of with the scheduling conflict of access link, adjust the scheduling timing relation.The suppose relay node device receives the first uplink information of base station by subframe n, sends corresponding upstream data in subframe n+K, and then the scheduling timing relation can be referring to table 2 (other scheduling timing relation be similar with table 2 in the mode one, repeats no more):
n |
0 |
1 |
5 |
6 |
K |
8,9 |
11 |
8,9 |
11 |
Table 2
As can be seen from Table 2: first after the subframe 0 scheduling subframe 7 and second sub-frame of uplink, second sub-frame of uplink after the subframe 1 scheduling subframe 8, after the subframe 5 scheduling subframes 2 first and second sub-frame of uplink, second sub-frame of uplink after the subframe 6 scheduling subframes 3.
Mode two, configuration 1~6 (except configuration 5).
Access link adopts the timing relationship of LTE technical stipulation in the configuration 1~6 (except configuration 5), and is as shown in table 1.At back haul link, a kind of feasible scheduling scheme is: relay node equipment receives the first uplink information that the base station sends at subframe n, relay node equipment is at sub-frame of uplink n+k2 (k2 value such as table 1 or table 2) available sub-frame of uplink n+k1 (k1>k2 afterwards, k1 is integer) transmission upstream data (optimally, the time delay between subframe n+k1 and the subframe n satisfies demodulation signaling requirement and time delay minimum).
What subframe n+k2 represented is afterwards k2 subframe of subframe n, the no longer repeat specification of follow-up similar expression mode.
Relay node equipment demodulates the first uplink information that the base station sends at subframe n+k1-k2 (k2 value such as table 1 or table 2) before, determines that subframe n+K is used for the back haul link transmission, will not send the first uplink information at subframe n+k1-k2 to user terminal.
The suppose relay node device receives the first uplink information at subframe n, the position of subframe n is identical with the LTE technical specification, relay node equipment sends corresponding upstream data at subframe n+k1, subframe n+k1 is first sub-frame of uplink after the subframe n+k2, then scheduling timing relation can be referring to table 3 (other scheduling timing relation be similar with table 3 in the mode two, repeats no more):
Table 3
The position of subframe n in the table 3 is identical with the LTE technical specification, in specific implementation process the position of subframe n can also from the LTE technical specification in different, the descending sub frame that relay node equipment can be in the LTE technical specification be used for scheduling receives the first uplink information from the base station.
The suppose relay node device receives the first uplink information at subframe n, the position of subframe n is different from the LTE technical specification, relay node equipment sends corresponding upstream data at subframe n+k1, time-delay between subframe n+k1 and the subframe n will guarantee the demodulation signaling requirement, and a kind of feasible scheduling timing relation can be referring to table 4:
Table 4
Mode 3, configuration 5.
For configuration 5, only has a sub-frame of uplink, can adopt the scheduling based on time slot (slot), a kind of feasible scheme is: the time slot (slot) of sub-frame of uplink is used for the uplink of back haul link, and another time slot (slot) is used for the uplink of access link.After then determination module 100 is determined subframe n k1 subframe afterwards, sending module 110 sends before the upstream data, k1 subframe after the subframe n that determines is divided into two time slots, one of them time slot is used for the uplink of back haul link, and another time slot is used for the uplink of access link.
Accordingly, sending module 110 sends upstream data by the time slot that is used for back haul link in k1 the subframe after the subframe n that determines.
Suppose at back haul link, the first uplink information that relay node equipment receives from the base station in subframe 7, relay node equipment sends upstream data at a time slot that is used for the back haul link transmission of subframe 2 to the base station.Relay node equipment is determined to send the second uplink information in subframe 8 to user terminal, and then via node will send upstream data at another time slot (time slot that namely is used for the uplink of access link) of subframe 2 at subframe 8 scheduling user terminals.
For mode 3, embodiment of the invention relay node equipment can further include: receiver module 120.
Receiver module 120 is used for being used for receiving on the time slot of access link uplink user terminal by k1 subframe after the subframe n and sends upstream data.
Need to prove, all modes in fdd mode and the tdd mode just illustrate, the embodiment of the invention is not limited to above-mentioned example, all is to use the embodiment of the invention as long as the time span between the first subframe and the second subframe is not equal to the mode of very first time length and the second time span sum.
As shown in Figure 5, the base station of the embodiment of the invention comprises: information sending module 200 and data reception module 210.
Information sending module 200 is used for sending the first uplink information by subframe n to relay node equipment.
Data reception module 210 is used for the upstream data by k1 subframe reception relay node equipment after the subframe n.
Wherein, k1 subframe and subframe m k2 subframe afterwards after the subframe n are not same subframes, m 〉=0, n 〉=0, and m and n be integer, k1 and k2 are positive integer and k1>k2;
Subframe m is relay node equipment sends subframe from the second uplink scheduling information to user terminal;
K2 subframe after the subframe m is relay node equipment receives the upstream data of user terminal according to the second uplink scheduling information subframe.
The base station of the embodiment of the invention can further include: notification module 220.
Notification module 220 is used for sending the backhaul link configuration information to relay node equipment before information sending module 200 sends the first uplink information, is used to indicate the descending sub frame that via node is determined the back haul link transmission.
As shown in Figure 6, the method for embodiment of the invention the first transmission upstream data comprises the following steps:
After step 601, relay node equipment receive the first uplink scheduling information of base station transmission by subframe n, determine that subframe n k1 subframe afterwards is used for the uplink of back haul link.
Step 602, relay node equipment according to the first uplink scheduling information by k1 subframe after the subframe n, on back haul link to base station transmission upstream data.
The first uplink scheduling information has comprised uplink scheduling order and/or PHICH, if PHICH is NACK, via node will be according to the rules the upstream data that retransmits of timed sending, if PHICH is ACK, will according to the uplink scheduling order be scheduled subframe in send new upstream data.
Wherein, k1 subframe and subframe m k2 subframe afterwards after the subframe n are not same subframes, m 〉=0, n 〉=0, and m and n be integer, k1 and k2 are positive integer and k1>k2;
Subframe m is relay node equipment sends subframe from the second uplink scheduling information to user terminal;
K2 subframe after the subframe m is relay node equipment receives the upstream data of user terminal according to the second uplink scheduling information subframe.
Can further include before the step 601:
Step a600, base station send the backhaul link configuration information to relay node equipment.
Wherein, the back haul link configuration information is used for the descending sub frame of semi-static configuration back haul link transmission, the inside has comprised the positional information that can be configured to downlink subframes in return link, and relay node equipment is configured to the MBSFN subframe according to this information with the descending sub frame of correspondence.
Step b600, relay node equipment are identified for the descending sub frame n of back haul link transmission according to the back haul link configuration information that the base station that receives sends, and with the descending sub frame determined as the MBSFN subframe.
For fear of the interference to receiver of the transmitter of relay node equipment, guarantee that simultaneously via node can send uplink scheduling order and PHICH on access link, need to be configured to the MBSFN subframe.
Concrete, relay node equipment is used for the descending transmission of access link with the previous of subframe or the first two OFDM symbol, and other symbols are used for the descending reception (when antenna port is 1 or 2, using previous symbol, is, uses the first two symbol) of back haul link at 4 o'clock.
In the step 601, relay node equipment can be determined first k1 subframe after the subframe n, and then determines to send to user terminal the subframe (being subframe m) of the second uplink information, and such as k2=4, in the radio frames, subframe n is subframe 0; The suppose relay node device is determined k1=8, and then k1 subframe after the subframe n is subframe 7, because k2=4, so relay node equipment can not send the second uplink information to user terminal by subframe 3.
If relay node equipment sends the second uplink information by subframe 3 to user terminal, be that subframe m is subframe 3, then k2 subframe after the subframe m is subframe 7, and obviously k1 subframe after the subframe n and subframe m k2 subframe afterwards are same subframes, so not all right.
Relay node equipment can also determine first to send to user terminal the subframe (being subframe m) of the second uplink information, and then k1 subframe after definite subframe n, and such as k2=4, in the radio frames, subframe n is subframe 0; Suppose that m is subframe 2 in the subframe, then k2 subframe after the subframe m is subframe 6, so k1 ≠ 6, namely relay node equipment can not send the second uplink information to user terminal by subframe 6.
If k1=6, then k1 subframe after the subframe n and subframe m k2 subframe afterwards are same subframes, so not all right.
Concrete which kind of mode that adopts can be set as required.
A kind of better mode, it is minimum to allow time delay between k1 the subframe after subframe n and the subframe n satisfy demand and the time delay of demodulation signaling, and then relay node equipment determines that k1 subframe after the subframe n is subframe n first sub-frame of uplink afterwards.
In specific implementation process, if when n gets a plurality of value simultaneously, the sub-frame of uplink of its scheduling is different; Value is different constantly if n is in difference, and the sub-frame of uplink of its scheduling can be identical, such as Fig. 4 B.
Concrete, when having simultaneously a plurality of descending sub frame n for the back haul link transmission, k1 subframe after each subframe n is different subframes.0 and 1 such as the n value, be after relay node equipment is received two the first uplink informations by subframe 0 and subframe 1 respectively, relay node equipment is determined subframe 0 corresponding subframe 8 (being subframe 0 the 8th subframe afterwards), then relay node equipment determines that the subframe of subframe 1 correspondence can only be other subframes (being k1 ≠ 7) except subframe 8, such as subframe 9.
Can guarantee that so same sub-frame of uplink do not dispatched by a plurality of descending sub frames, avoid scheduling resource conflict (if dispatched by a plurality of descending sub frames, may cause the scheduling resource conflict).
If relay node equipment in fdd mode, k2=4, then k1-4 subframe after subframe m and the subframe n is different subframes;
If relay node equipment is in tdd mode, then the value of k2 adopts the value of HARQ timing relationship regulation in the LTE technical specification (being 3GPPTS 36.213), and scheduling subframe n k1 the subframe afterwards of then stipulating in subframe m and the LTE technical specification is different subframes.
The below is applied in fdd mode take relay node equipment and is elaborated as example.
Shown in Fig. 4 A, in the timing relationship schematic diagram one of embodiment of the invention FDD system, at access link, relay node equipment sends upstream data at subframe 1 scheduling user terminal in subframe 5; At back haul link, relay node equipment receives the first uplink information that the base station sends in subframe 1, because user terminal can send upstream data in subframe 5, so relay node equipment is chosen in subframe 6 and sends corresponding upstream data to the base station, and relay node equipment can send the second uplink information to user terminal in subframe 2.
Shown in Fig. 4 B, in the timing relationship schematic diagram two of embodiment of the invention FDD system, at access link, relay node equipment sends upstream data at subframe 1 scheduling UE in subframe 5; At back haul link, relay node equipment receives the first uplink information that the base station sends in subframe 1 or subframe 2, because user terminal can send upstream data in subframe 5, so relay node equipment is chosen in subframe 7 and sends corresponding upstream data to the base station, and relay node equipment can send the second uplink information to user terminal in subframe 3.
The below is applied in tdd mode take relay node equipment and is elaborated as example.Because different configuration in the tdd mode, regularly length is not identical for scheduling of user terminals, so according to configuration feature, will dispose 0~7 and be divided into 3 kinds of modes and describe.
Mode one, configuration 0.
Owing in configuration 0, have the situation (being subframe 0 and subframe 5) of two subframes of a subframe scheduling, accordingly, k2 subframe and k3 the subframe upstream data that receive user terminal of relay node equipment after the subframe m that sends the second uplink scheduling information to user terminal then can further include between step 601 and the step 602:
When relay node equipment is subframe 0 or subframe 5 at subframe n, determine subframe n k4 subframe afterwards.
Wherein, k3 and k4 are positive integer and k1 ≠ k3 ≠ k4; Value minimum among k1 and the k4 is greater than value maximum among k2 and the k3, and k1 subframe after the subframe n is not same subframe with k3 subframe after the subframe m, and subframe n k4 subframe and subframe m k2 subframe and k3 subframe afterwards afterwards is not same subframe.
Accordingly, relay node equipment sends upstream data by k1 subframe and k4 subframe after the subframe n to the base station in the step 602.
Minimum for the demand and the time delay that allow k1 subframe after subframe n and the subframe n and the time delay between k4 the subframe after subframe n and the subframe n satisfy the demodulation signaling, then the subframe n that determines of relay node equipment k1 subframe and k4 subframe afterwards is respectively first sub-frame of uplink and second sub-frame of uplink after subframe n k5 the subframe afterwards;
Wherein the value of k5 equals value maximum among k2 and the k3.
Concrete, for tdd mode configuration 0, can exist multiframe to transfer in the LTE technical specification, subframe 0 scheduling subframe 4 and subframe 7, subframe 1 scheduling subframe 8, subframe 5 scheduling subframe 9 and subframes 2, subframe 6 scheduling subframes 3, access link adopts above-mentioned scheduling timing relation.At back haul link, for fear of with the scheduling conflict of access link, adjust the scheduling timing relation.The suppose relay node device sends corresponding upstream data by the first uplink information of subframe n reception base station in subframe n+K, then the scheduling timing relation can be referring to table 2 (other scheduling timing relation and table 2 be similar in the mode one, repeat no more).
Mode two, configuration 1~6 (except configuration 5).
The timing relationship of access chain LTE technical stipulation is as shown in table 1 in the configuration 1~6 (except configuration 5).At back haul link, a kind of feasible scheduling scheme is: relay node equipment receives the first uplink information that the base station sends at subframe n, relay node equipment is at sub-frame of uplink n+k2 (k2 value such as table 1 or table 2) available sub-frame of uplink n+k1 (k1>k2 afterwards, k1 is integer) transmission upstream data (optimally, the time delay between subframe n+k1 and the subframe n satisfies demodulation signaling requirement and time delay minimum).
What subframe n+k2 represented is afterwards k2 subframe of subframe n, the no longer repeat specification of follow-up similar expression mode.
Relay node equipment demodulates the first uplink information that the base station sends before at subframe n+k1-k2 (k2 value such as table 1 or table 2), determines that subframe n+K is used for the back haul link transmission, will not send the first uplink information at subframe n+k1-k2 to user terminal.
The suppose relay node device receives the first uplink information at subframe n, the LTE technical specification of subframe n is identical, relay node equipment sends corresponding upstream data at subframe n+k1, subframe n+k1 is first sub-frame of uplink after the subframe n+k2, then the scheduling timing relation can be referring to table 3 (other scheduling timing relation be similar with table 3 in the mode two, repeats no more).
The LTE technical specification of subframe n in the table 3 is identical, and the position of subframe n is also different in the LTE technical specification in specific implementation process, is used for receiving on the descending sub frame of scheduling the first uplink information from the base station in the relay node equipment LTE technical specification.
The suppose relay node device receives the first uplink information at subframe n, the LTE technical specification of subframe n is different, relay node equipment sends corresponding upstream data at subframe n+k1, time-delay between subframe n+k1 and the subframe n will guarantee the demodulation signaling requirement, and a kind of feasible scheduling timing relation can be referring to table 4.
Mode 3, configuration 5.
For configuration 5, only has a sub-frame of uplink, can adopt the scheduling based on time slot (slot), a kind of feasible scheme is: the time slot (slot) of sub-frame of uplink is used for the uplink of back haul link, and another time slot (slot) is used for the uplink of access link.Then can further include between step 601 and the step 602:
Relay node equipment is divided into two time slots with k1 subframe after the subframe n that determines, one of them time slot is used for the uplink of back haul link, and another time slot is used for the uplink of access link.
Accordingly, relay node equipment sends upstream data by the time slot that is used for back haul link in k1 the subframe after the subframe n that determines in the step 602.
Suppose at back haul link, the first uplink information that relay node equipment receives from the base station in subframe 7, relay node equipment sends upstream data at a time slot that is used for the back haul link transmission of subframe 2 to the base station.Relay node equipment is determined to send the second uplink information in subframe 8 to user terminal, and then via node will send upstream data at another time slot (time slot that namely is used for the uplink of access link) of subframe 2 at subframe 8 scheduling user terminals.
For mode 3, in the step 602, relay node equipment can also send upstream data by being used for receiving user terminal on the time slot of access link uplink in k1 the subframe after the subframe n.
Need to prove, all modes in fdd mode and the tdd mode just illustrate, the embodiment of the invention is not limited to above-mentioned example, all is to use the embodiment of the invention as long as the time span between the first subframe and the second subframe is not equal to the mode of very first time length and the second time span sum.
As shown in Figure 7, the method for embodiment of the invention the second transmission upstream data comprises the following steps:
Step 701, base station send the first uplink scheduling information by subframe n to relay node equipment.
Step 702, base station k1 subframe after subframe n receives the upstream data that corresponding relay node equipment sends;
Wherein, k1 subframe and subframe m k2 subframe afterwards after the subframe n are not same subframes, m 〉=0, n 〉=0, and m and n be integer, k1 and k2 are positive integer and k1>k2;
Subframe m is relay node equipment sends subframe from the second uplink scheduling information to user terminal;
K2 subframe after the subframe m is relay node equipment receives the upstream data of user terminal according to described the second uplink scheduling information subframe.
Can further include before the step 701:
Step 700, base station send the backhaul link configuration information to relay node equipment, are used to indicate the descending sub frame that via node is determined the back haul link transmission.
If the base station under the FDD mode of operation, k1>4 then;
If the base station is under the TDD mode of operation, the value of k1 is greater than the value of HARQ timing relationship regulation in the LTE technical specification.
For the tdd frame structure in LTE technical specification configuration 0, when subframe n is subframe 0 or subframe 5, in the step 702, k1 the subframe of base station after the subframe n that relay node equipment is determined and the upstream data of k4 subframe reception relay node equipment transmission;
Wherein, k1 and k4 are positive integer and k1 ≠ k4.
For the configuration of the tdd frame structure in the LTE standard 5, in the step 702, the time slot that is used for the back haul link transmission of k1 the subframe of base station after the subframe n that relay node equipment is determined receives the upstream data that relay node equipment sends.
Wherein, when n got a plurality of different value simultaneously, k1 subframe after each subframe n was different subframes.
From above-described embodiment, can find out: after embodiment of the invention relay node equipment receives the first uplink scheduling information of base station transmission by subframe n, determine that described subframe n k1 subframe afterwards is used for the uplink of back haul link; Described relay node equipment by k1 subframe after the described subframe n, sends upstream data to described base station according to described the first uplink scheduling information on back haul link; Wherein, k1 subframe and subframe m k2 subframe afterwards after the described subframe n are not same subframes, m 〉=0, n 〉=0, and m and n be integer, k1 and k2 are positive integer and k1>k2; Described subframe m is described relay node equipment sends subframe from the second uplink scheduling information to user terminal; K2 subframe after the described subframe m is described relay node equipment receives the upstream data of user terminal according to described the second uplink scheduling information subframe.
Determine the sub-frame of uplink of back haul link owing to adopt the dynamic dispatching mode, thereby can avoid RN equipment in same subframe, both to send data to eNB, receive again the situation from the data of UE, and improved performance and the efficient of relay node equipment, and the flexibility of subframe scheduling.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.