CN102595628A - Cross carrier scheduling method in carrier aggregation with different uplink and downlink allocations - Google Patents
Cross carrier scheduling method in carrier aggregation with different uplink and downlink allocations Download PDFInfo
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Abstract
The invention provides a cross carrier scheduling method in carrier aggregation with different uplink and downlink allocations. The cross carrier scheduling method comprises step A, determining whether an uplink subframe of a component carrier is more than that of a scheduled component carrier, if so, performing step B; step B, adding one bit to the downlink control information DCI of the scheduled component carrier to indicate whether the scheduled component carrier is cross subframe scheduling; step C, determining whether the uplink and the downlink of the scheduled component carrier are consistent with those of corresponding subframe of the component carrier, if so, performing step E, otherwise step D; step D, enabling an downlink subframe of the component carrier offset at certain time before the downlink so as to complete the scheduling; and step E, performing cross carrier scheduling to the scheduled component carrier according to timing relationship of the component carrier, but transmitting hybrid automatic repeat request physical indicator channel (PHICH) according to positions of the component carrier so that the scheduling is completed.
Description
Technical field
The present invention relates to the mobile communication technology field, particularly carrier aggregation technology relates in particular to and intersects carrier scheduling method in a kind of different up-downgoing proportioning carrier aggregation.
Background technology
In senior Long Term Evolution project time division duplex version 10 (LTE-A TDD Release10), introduce the carrier aggregation notion to support more wide bandwidth transmission, promptly two or more carrier waves are grouped together in together, to support the transmission of LTE-A transmission bandwidth greater than 20MHz.TD for the carrier aggregation of Release10; (intra-band) scene in the band support; This frequency range (band) is the spendable Radio Resource frequency spectrum resource that International Telecommunications Union confirms; If produce serious disturbance when adopting different up-downgoing proportionings can make up and descending transmitting-receiving, so each member carrier of polymerization (component carrier) adopts identical TDD up-downgoing proportioning
Table 1 is depicted as the ascending-descending subframes configuration mode of TDD, has wherein listed ascending-descending subframes configurations different in 7.Letter D representes that this subframe is a descending sub frame; Letter U representes that this subframe is a sub-frame of uplink; Letter S representes that this subframe is that special subframe (comprises descending pilot frequency time slot (DwPTS, Downlink Pilot Time Slot), uplink pilot time slot (UpPTS; Uplink Pilot Time Slot), protection time slot (Guard Period)).
Table 1
Be illustrated in figure 1 as in the prior art among a kind of typical R elease10 the up-downgoing proportioning of each member carrier under the carrier aggregation scene, wherein member carrier 1 (CC1) all adopts the up-corresponding up-downgoing proportioning of downstream arrangements sign 1 (being designated hereinafter simply as configuration 1) shown in the table 1 to member carrier 5 (CC5).
In Release10; In order to reduce of the interference of isomery scene to control channel; Introduced intersection carrier dispatching notion, i.e. the control information of a carrier wave can be distinguished the carrier wave that is scheduled through the carrier wave indication territory (CIF) that adds 3bit in Downlink Control Information (DCI) front by other carriers carry.Be illustrated in figure 2 as the sketch map of intersection carrier dispatching; Wherein the Physical Downlink Control Channel (PDCCH) of carrier wave 0 (CC0) has carried the control information of these three carrier waves of CC0-CC2, comes the Physical Downlink Shared Channel (PDSCH) of corresponding CC0-CC2 respectively with the different values of CIF.
In Release11, will introduce (inter-band) carrier aggregation between frequency range, to reach the utilization of resources more flexibly.When different frequency range uses different up-downgoing proportionings, the scene that sub-frame of uplink conflicts with descending sub frame may appear, be depicted as the sketch map that carrier aggregation different frequency range between frequency range uses different up-downgoing proportionings like Fig. 3 a to Fig. 3 c.Wherein the CC1 of Fig. 3 a uses the configuration 1 shown in the table 1, and CC2 uses the configuration 2 shown in the table 1, has occurred the situation (subframe shown in the ellipse) of ascending-descending subframes conflict respectively in subframe 3 and subframe 8.The CC1 of Fig. 3 b uses configuration 3, and CC2 uses configuration 4, the ascending-descending subframes conflict occurs in subframe 4.The CC1 of Fig. 3 c uses configuration 2, and CC2 uses configuration 4, the situation of ascending-descending subframes conflict all occurs in subframe 3, subframe 6 and subframe 7.Other subframes are non-conflict subframe.
This situation can influence the intersection carrier dispatching, therefore need revise to adapt to new scene for the intersection carrier dispatching of Rel-10 definition.In Rel-10, also defined the notion of sub-district (Cell), the up CC that each Cell comprises a descending CC and is connected.
The enhancement mode Physical Downlink Control Channel is being discussed in Rel-11 at present, and promptly e-PDCCH transmits PDCCH to reach the purpose that strengthens the control channel capacity through some zone in PDSCH.Be illustrated in figure 4 as the configuration schematic diagram of PDCCH and e-PDCCH.
The intersection carrier dispatching of Rel-10 can comprise that the PDCCH of a CC dispatches the situation of the PDSCH/ Physical Uplink Shared Channel (PUSCH) of another CC.Under the situation that TDD different frequency range difference disposes up and down, have four kinds of situation shown in Figure 5.As Fig. 5 (a) (c) shown in, then no problem if the relation corresponding scheduling subframe of subframe that is scheduled is a descending sub frame chronologically, can be according to the intersection carrier dispatching of Rel-10 definition.As Fig. 5 (b) (d) shown in, if the relation corresponding scheduling subframe of subframe that is scheduled is a sub-frame of uplink chronologically,, can't send mandate because the scheduling subframe is a sub-frame of uplink, therefore can not dispatch.
Summary of the invention
The invention provides and intersect carrier scheduling method in a kind of different up-downgoing proportioning carrier aggregation, can realize the carrier dispatching that TDD different frequency range difference disposes up and down.
The embodiment of the invention provides intersects carrier scheduling method in a kind of different up-downgoing proportioning carrier aggregation, comprise the steps:
A, judge the scheduling member carrier sub-frame of uplink whether more than the sub-frame of uplink of the member's carrier wave that is scheduled, if, execution in step B;
B, in the Downlink Control Information DCI of member's carrier wave that is scheduled, increase by 1 bit and indicate whether to stride subframe scheduling;
Whether C, the subframe of judging the member's carrier wave that is scheduled be consistent with the up-downgoing of the corresponding subframe of scheduling member carrier, if, execution in step E, otherwise, execution in step D;
Before the D, said descending sub frame sometime the descending sub frame of the scheduling member carrier of skew to the carrier dispatching that intersects of this subframe, thereby accomplish this scheduling;
E, by scheduling member carrier timing relationship to member's carrier transposition carrier dispatching that is scheduled, but the automatic repeat requests indicating channel of physical mixed PHICH according to the location transmission of scheduling member carrier, thereby accomplish this scheduling.
Preferably, the said judged result of steps A is not, further comprises:
F, judge whether the subframe of the member's carrier wave that is scheduled is sub-frame of uplink, if execution in step G, otherwise, execution in step H;
G: on the corresponding scheduling CC of the subframe of send authorizing, intersect carrier dispatching by member's carrier dispatching timing relationship that is scheduled; Corresponding PHICH still is transmitted on the scheduling member carrier; And transmit by the PHICH sequential relationship of scheduling member carrier, and accomplish this scheduling;
H, scheduling member carrier intersect carrier dispatching to the said subframe of the member's carrier wave that is scheduled.
Preferably, said step G comprises:
G1, judge that whether the subframe of the member's carrier wave that is scheduled is and the subframe of conflicting of dispatching member carrier, if, execution in step G2, otherwise execution in step G3;
G2, the CC that is scheduled will authorize according to self timing relationship transmission on the subframe of corresponding scheduling CC, and accomplish this scheduling;
G3, by scheduling member carrier timing relationship to member's carrier transposition carrier dispatching that is scheduled.
Preferably, this method is used for LTE-A TDD system.
Preferably, said scheduling member carrier uses the identical switching point cycle with the member's carrier wave that is scheduled.
Preferably, the said switching point cycle is 5ms or 10ms.
Preferably, if the scheduling member carrier or the member's carrier wave that is scheduled use sub-frame configuration 0, then limit I
_ PHICH=0.
Can find out from above technical scheme; Under the situation of sub-frame of uplink more than the sub-frame of uplink that is scheduled to carrier wave of scheduling member carrier; When the up-downgoing of the subframe of the member's carrier wave that the is scheduled subframe corresponding with the scheduling member carrier is inconsistent; Before the descending sub frame sometime the descending sub frame of the scheduling member carrier of skew the carrier dispatching that intersects of this subframe is intersected carrier dispatching and can't send the problem of mandate thereby solved in the different up-downgoing proportioning carrier aggregation.Sub-frame of uplink for the scheduling member carrier is less than the situation of the sub-frame of uplink of the member's carrier wave that is scheduled, and the embodiment of the invention has also provided corresponding scheduling scheme.
Description of drawings
Fig. 1 is the up-downgoing proportioning sketch map of each member carrier under the carrier aggregation scene among a kind of typical R elease10 in the prior art;
Fig. 2 is the sketch map of intersection carrier dispatching;
Fig. 3 a to Fig. 3 c is the sketch map that the carrier aggregation different frequency range uses different up-downgoing proportionings between frequency range;
Fig. 4 is the configuration schematic diagram of PDCCH and e-PDCCH;
Fig. 5 is the sketch map of four kinds of situation disposing up and down in TDD different frequency range difference;
Fig. 6 is less than the scheduling scheme sketch map of the CC that is scheduled for the scheduling CC descending sub frame of the embodiment of the invention;
Fig. 7 a is the sketch map of the scheduling CC descending sub frame of the embodiment of the invention more than the scheduling scheme one of the CC that is scheduled;
Fig. 7 b is the sketch map of the scheduling CC descending sub frame of the embodiment of the invention more than the scheduling scheme two of the CC that is scheduled;
The carrier scheduling method schematic flow sheet that Fig. 8 provides for the embodiment of the invention one;
The carrier scheduling method schematic flow sheet that Fig. 9 provides for the embodiment of the invention two.
Embodiment
The present invention is applicable to the full duplex scene; For configuration 0-configuration 6 these seven kinds of ratio of uplink subframe to downlink subframe; Because mixing match has the complexity of considerable influence and design higher to standard, so the present invention will use the hypothesis in identical switching point cycle based on the polymerization carrier wave.Suppose that different CC only dispose the combination of the subframe proportioning of 5ms or 10ms.Call scheduling CC to the CC that carries scheduling authorization simultaneously, the CC that scheduling authorization transmits on other CC is called the CC that is scheduled.
More than the sub-frame of uplink of the CC that is scheduled the time, as shown in Figure 6 for the sub-frame of uplink of scheduling CC.CC1 is scheduling CC, and CC2 is the CC that is scheduled.As shown in Figure 6,601-604 is the timing relationship that CC1 sends the uplink authorization of sub-frame of uplink.Mandate for the PUSCH of the non-conflict subframe of the CC that is scheduled; Can be according to the timing relationship of the mandate of the PUSCH of scheduling carrier wave; For example the uplink authorization of CC2 can be by the scheduling timing relationship of CC1; That is, (shown in the arrow 605) transmitted in the mandate of the last subframe 2 of CC2 on the subframe 6 of CC1, and (shown in the arrow 607) transmitted in the mandate of the subframe 7 of CC2 on the subframe 1 of CC1.The corresponding automatic repeat requests indicating channel of physical mixed (PHICH, Physical Hybrid-ARQ Indicator Channel) still is transmitted on the CC (being CC1) that sends uplink authorization, and transmits by the PHICH sequential relationship of CC1.
The scheduling CC of the subframe that is squinted by a certain subframe (time) before this conflict subframe for the downstream grants of conflict subframe intersects carrier dispatching.When for example this skew was made as three sub-frame, the DCI of CC2 subframe 3 transmitted (shown in the arrow 606) in the subframe 0 of CC1, and the DCI of CC2 subframe 8 transmits (shown in the arrow 608) in the subframe 5 of CC1.Because CC1 subframe 0 will be sent the PDCCH of subframe 0 on the CC1 when intersecting carrier dispatching; Also to transmit the PDCCH of subframe 0 and the subframe 3 of CC2; For the DCI of the subframe of distinguishing CC2 0 with subframe 3, therefore definition 1bit indicates whether for striding subframe scheduling in the DCI of CC2.
For the PDSCH of the non-conflict subframe of the CC that is scheduled, can intersect carrier dispatching according to scheduling CC with TTI.For example, the intersection carrier dispatching of arrow 609 expressions.
For the situation of scheduling CC descending sub frame more than the CC that is scheduled, scheduling scheme is just like shown in Fig. 7 (a), and wherein 701-703 sends the timing relationship of sub-frame of uplink uplink authorization for scheduling CC.The mandate of the descending sub frame of each CC that is scheduled still can intersect carrier dispatching by scheduling CC, shown in 708.Uplink authorization (comprising conflict subframe and non-conflict subframe) for the CC that is scheduled; Scheduling timing relationship according to this CC self sends on the corresponding subframe of scheduling CC, and for example the mandate of the subframe 7,8 of CC2 should be in the subframe 1 of CC2; Send on 4; Therefore when intersecting carrier dispatching, with sending and authorize (arrow 704, shown in 705) by the subframe 1,4 of CC1 respectively.In like manner, (shown in arrow 706,707) sent in the mandate of CC2 subframe 2,3 on CC1 subframe 6,9.But PHICH is according to the subframe transmission of scheduling CC; Do not increase new PHICH subframe; The position that is the PHICH of CC1 still is subframe 3 and subframe 8, and these two PHICH resources need be fed back the subframe 3 of CC2 and the Ack/Nack information (shown in the arrow 709 and 710) of subframe 8.
For sub-frame configuration 0,, possibly send 2 PHICH set a PHICH resource accordingly owing to exist 1 sub-frame to send the situation of 2 sub-frame mandates; Therefore; When using sub-frame configuration 0, will limit I for avoiding confusion and the simplified system design, no matter dispatching the CC or the CC that is scheduled
_ PHICH=0.
For the situation of scheduling CC descending sub frame more than the CC that is scheduled, scheduling scheme two is shown in Fig. 7 (b).701-703 sends the timing relationship of sub-frame of uplink mandate for scheduling CC.For non-conflict subframe, subframe 2 and 7 for example, the CC that is scheduled will intersect carrier dispatching (shown in arrow 704,706) by the timing relationship of scheduling CC.For the conflict subframe, subframe 3 and 8 for example, the CC that is scheduled will be according to self timing relationship transmission mandate (shown in arrow 705,707) on the subframe of corresponding scheduling CC.
PHICH does not increase new PHICH subframe according to the subframe transmission of scheduling CC, and promptly the position of the PHICH of CC1 still is subframe 3 and subframe 8, and these two PHICH resources need be fed back the subframe 3 of CC2 and the Ack/Nack information (shown in the arrow 708 and 709) of subframe 8.
For sub-frame configuration 0,, possibly send 2 PHICH set a PHICH resource accordingly owing to exist 1 sub-frame to send the situation of 2 sub-frame mandates; Therefore; When using sub-frame configuration 0, will limit I for avoiding confusion and the simplified system design, no matter dispatching the CC or the CC that is scheduled
_ PHICH=0.
The intersection carrier scheduling method flow process that the embodiment of the invention provides is as shown in Figure 8, comprises the steps:
Step 801: whether the sub-frame of uplink (descending sub frame) of judging the scheduling member carrier is more than (being less than) the be scheduled sub-frame of uplink of member's carrier wave, if execution in step 802, otherwise, execution in step 806.
Step 802: in the descending DCI of member's carrier wave that is scheduled, increase 1bit and indicate whether to stride subframe scheduling.
Step 803: whether the subframe of judging the member's carrier wave that is scheduled is consistent with the up-downgoing of the corresponding subframe of scheduling member carrier, if, execution in step 805, otherwise, execution in step 804.
Step 804: before the said descending sub frame sometime the descending sub frame of the scheduling member carrier of skew to the carrier dispatching that intersects of this subframe, thereby accomplish this scheduling.
Step 805: by scheduling member carrier timing relationship to member's carrier transposition carrier dispatching that is scheduled, but PHICH according to the location transmission of scheduling CC, thereby accomplish this scheduling.
Step 806: whether the subframe of judging the member's carrier wave that is scheduled is sub-frame of uplink, if carry out 807, otherwise, carry out 808.
Step 807: by intersecting carrier dispatching on the corresponding scheduling CC of the corresponding subframe of timing relationship of member's carrier wave transmission mandate that is scheduled, corresponding PHICH still is transmitted on the scheduling member carrier, and transmits by the PHICH sequential relationship of dispatching member carrier.And process ends.
Step 808: the scheduling member carrier intersects carrier dispatching to the said subframe of the member's carrier wave that is scheduled.
The intersection carrier scheduling method flow process that scheme 2 embodiment of the invention provide is as shown in Figure 9, comprises the steps:
Step 901: whether the sub-frame of uplink (descending sub frame) of judging the scheduling member carrier is more than (being less than) the member's carrier wave that is scheduled, if execution in step 902, otherwise, execution in step 906.
Step 902: in the descending DCI of member's carrier wave that is scheduled, increase 1bit and indicate whether to stride subframe scheduling.
Step 903: whether the subframe of judging the member's carrier wave that is scheduled is consistent with the up-downgoing of the corresponding subframe of scheduling member carrier, if, execution in step 905, otherwise, execution in step 904.
Step 904: the descending sub frame of the scheduling member carrier that squints sometime before the said descending sub frame is to the carrier dispatching that intersects of this subframe.
Step 905: by scheduling member carrier timing relationship to member's carrier transposition carrier dispatching that is scheduled, but PHICH is according to the location transmission of scheduling CC.
Step 906: whether the subframe of judging the member's carrier wave that is scheduled is sub-frame of uplink, if execution in step 907, otherwise, execution in step 908.
Step 907: whether the subframe of judging the member's carrier wave that is scheduled is and the subframe of conflicting of dispatching member carrier.If, execution in step 910.Otherwise, execution in step 909.
Step 908: the scheduling member carrier intersects carrier dispatching to the said subframe of the member's carrier wave that is scheduled.
Step 909: by intersecting carrier dispatching on the corresponding scheduling CC of the corresponding subframe of timing relationship of scheduling member carrier transmission mandate, corresponding PHICH still is transmitted on the scheduling member carrier, and transmits by the PHICH sequential relationship of dispatching member carrier.And process ends.
Step 910: the CC that is scheduled will authorize according to self timing relationship transmission on the subframe of corresponding scheduling CC.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope that the present invention protects.
Claims (7)
1. intersect carrier scheduling method in the different up-downgoing proportioning carrier aggregation, it is characterized in that, comprise the steps:
A, judge the scheduling member carrier sub-frame of uplink whether more than the sub-frame of uplink of the member's carrier wave that is scheduled, if, execution in step B;
B, in the Downlink Control Information DCI of member's carrier wave that is scheduled, increase by 1 bit and indicate whether to stride subframe scheduling;
Whether C, the subframe of judging the member's carrier wave that is scheduled be consistent with the up-downgoing of the corresponding subframe of scheduling member carrier, if, execution in step E, otherwise, execution in step D;
Before the D, said descending sub frame sometime the descending sub frame of the scheduling member carrier of skew to the carrier dispatching that intersects of this subframe, thereby accomplish this scheduling;
E, by scheduling member carrier timing relationship to member's carrier transposition carrier dispatching that is scheduled, but the automatic repeat requests indicating channel of physical mixed PHICH according to the location transmission of scheduling member carrier, thereby accomplish this scheduling.
2. method according to claim 1 is characterized in that, the said judged result of steps A is not, further comprises:
F, judge whether the subframe of the member's carrier wave that is scheduled is sub-frame of uplink, if execution in step G, otherwise, execution in step H;
G: on the corresponding scheduling CC of the subframe of send authorizing, intersect carrier dispatching by member's carrier dispatching timing relationship that is scheduled; Corresponding PHICH still is transmitted on the scheduling member carrier; And transmit by the PHICH sequential relationship of scheduling member carrier, and accomplish this scheduling;
H, scheduling member carrier intersect carrier dispatching to the said subframe of the member's carrier wave that is scheduled.
3. method according to claim 2 is characterized in that, said step G comprises:
G1, judge that whether the subframe of the member's carrier wave that is scheduled is and the subframe of conflicting of dispatching member carrier, if, execution in step G2, otherwise execution in step G3;
G2, the CC that is scheduled will authorize according to self timing relationship transmission on the subframe of corresponding scheduling CC, and accomplish this scheduling;
G3, by scheduling member carrier timing relationship to member's carrier transposition carrier dispatching that is scheduled.
4. method according to claim 1 is characterized in that, this method is used for LTE-A TDD system.
5. method according to claim 1 is characterized in that, said scheduling member carrier uses the identical switching point cycle with the member's carrier wave that is scheduled.
6. method according to claim 5 is characterized in that, the said switching point cycle is 5ms or 10ms.
7. according to each described method of claim 1 to 6, it is characterized in that,, then limit I if the scheduling member carrier or the member's carrier wave that is scheduled use sub-frame configuration 0
_ PHICH=0.
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