CN102271016A - configuration method for novel TDD HARQ UL Un subframe - Google Patents
configuration method for novel TDD HARQ UL Un subframe Download PDFInfo
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Abstract
The invention discloses a configuration method for a novel Un subframe of up link (UL) of a hybrid automatic repeat-request (HARQ) time sequence of a time division duplex (TDD) system. The method comprises the following steps: step one, selecting a down link (DL) subframe at an e NB end according to a minimum feedback time delay principle and configuring the selected DL subframe as a UL Un subframe; step two, configuring a DL subframe corresponding to the selected DL subframe as a UL Un subframe that is used for replacing the UL subframe to complete Un communication. According to the invention, a DL subframe is designed as a novel UL Un subframe to replace a traditional TDD HARQ UL subframe, so that a problem that a Un interface is lack of a UL subframe in a long term evolution-advanced (LTE-A) system can be solved and thus modification of an original LTE user protocol at a Uu interface can be avoided, thereby obtaining good compatibility in the LTE-A relay system by the original LTE user.
Description
Technical field
The invention belongs to the mobile communication technology field, relate to a kind of collocation method of novel TDD HARQ UL Un subframe.
Background technology
Current communications field development potentiality maximum, the mobile communication technology that market prospects are the widest have welcome the 3G epoch.But in order to solve frequency spectrum resource anxiety, limited, user (the User Equipment of power system capacity, UE) the growing problem of demand, International Telecommunication Association's tissue has started the technology collecting work of the 4th IMT-Advanced of third-generation mobile communication system (ITU) in February, 2008.In order to respond the technology collection of ITU-R IMT-Advanced, also be unwilling to remain out of the limelight as the 3GPP that had once formulated industry 3G UMTS technical standard with strongest influence power, enhancement mode Long Term Evolution (Long Term Evolution-Advanced, LTE-A) standard process have been launched in March, 2008.
A characteristic of LTE-A system be in system, introduced relay station (Relay Station, RS).The coverage that being introduced in of RS improved signal to a certain extent and the capacity of system.But also because the introducing of relay station, time division duplex (Time Division Duplex, TDD) automatic repeat requests (HybridAutomatic Repeat-reQuest mixes in system, HARQ) distribution of sequential and Un interface subframe will be affected, and has passed through two principles of the Un of TDD system interface sub-frame allocation in 60 meetings of 3GPP WG1 RAN:
(1), supports symmetry and asymmetric two kinds of DL/UL Un sub-frame allocation modes for the TDD system;
(2), support the demonstration method of salary distribution of Un UL subframe for the TDD system.
Yet, how to determine that the distribution of TDD Un interface subframe and backhaul HARQ sequential remain the problem that needs are inquired into.For example, if use UL (Up Link) subframe to feed back the ACK/NACK feedback signaling of one group of associated DL (Down Link) subframe at the Un interface, particularity according to former agreement of LTE and Un interface, some subframe can be assigned to Uu interface (be relayed to relay station and have jurisdiction over interface between the user) in this group DL subframe, and the ACK/NACK feedback signaling that is assigned to the DL subframe of Uu interface like this will not have corresponding UL subframe to feed back.In order to address this problem, some company proposes to revise the former agreement HARQ sequential of LTE, is fed back by the UL subframe of distributing to the Uu interface, addresses this problem with this.Will make the LTE original subscriber can't compatible this system but revise the former agreement of LTE, so this is should fight off in the LTE-A standardization effort.
With TDD HARQ configuration 2 is example, as shown in Figure 1, because 0,1,5,6 four subframes need transmit some special signalings thereby can not be applied to the Un interface, therefore can only be used for the Uu interface.And only there are two UL subframes 2,7 in this configuration.UL subframe 2 is fed back the ACK/NACK signaling of DL subframes 4,5,6,8 as can be seen from Figure 1, and is subjected to 8 scheduling of DL subframe; The ACK/NACK signaling of UL subframe 7 feedback DL subframes 9,0,1,3, and be subjected to 3 scheduling of DL subframe.UL subframe 2 and UL subframe 7 must be applied to the Uu interface at the Uu interface in order to keep former LTE agreement, the Un interface will not have the UL subframe and can use like this.If UL subframe 2 or 7 is applied to the Un interface, the DL subframe 0,1 so, and 5,6 will lack the feedback its signaling the UL subframe, make subframe 2 substitute the ACK/NACK signaling that subframe 7 is fed back DL subframe 5,6 if revise former LTE agreement, perhaps make subframe 7 substitute subframe 2 and feed back DL subframe 0,1 ACK/NACK signaling, so all can cause the modification in the former agreement of Uu interface LTE, make that former LTE user can't compatible existing system, therefore existing technology can't solve the problem of the above-mentioned UL subframe disappearance of mentioning.
Summary of the invention
Technical problem to be solved by this invention is: a kind of collocation method of novel TDD HARQ UL Un subframe is provided, and this method need not to change the problem that the former agreement of LTE also can solve UL subframe disappearance at the Uu interface.
For solving the problems of the technologies described above, the present invention adopts following technical scheme.
A kind of collocation method of novel TDD HARQ UL Un subframe may further comprise the steps:
As a preferred embodiment of the present invention, in the step 1, the method that reconfigures in the described DL subframe that is selected of eNB end is: preceding n OFDM symbol of the described DL subframe that is selected is used for the transmitting physical downlink control channel, and informs that the described DL subframe that is selected of grand user is the MBSFN subframe; N+1 OFDM symbol of the described DL subframe that is selected is used for the conversion that is dealt into up receipts from descending, receives upstream data from RN from n+2 OFDM sign-on.
As another kind of preferred version of the present invention, in the step 2, hold the collocation method of corresponding DL subframe to be at RN: preceding n+1 OFDM symbol of corresponding DL subframe is used for the transmitting physical downlink control channel, and informs that the corresponding DL subframe of user that RN has jurisdiction over is the MBSFN subframe; Corresponding DL subframe is held to eNB from the ACK/NACK feedback signaling of n+2 each DL subframe of OFDM sign-on transmission Un interface end and the UL data message that is scheduled.
As another preferred version of the present invention, the ratio of number and the number of ULUn subframe that is configured to the DL subframe of UL Un subframe is 1: 1,2: 1 or 3: 1.
Beneficial effect of the present invention is: the present invention is designed to a kind of novel UL Un subframe with the DL subframe and substitutes traditional TDD HARQ UL subframe, thereby solve the problem of Un interface disappearance UL subframe in the LTE-A system, avoided in of the modification of Uu interface, made former LTE user in the LTE-A relay system, obtain good compatibility former LTE User Agreement.
Description of drawings
Fig. 1 is a TDD HARQ LTE allocation plan;
Fig. 2 is a UL Un sub-frame configuration schematic diagram;
Fig. 3 is configured to the schematic diagram of UL Un subframe for DL subframe 3 among the embodiment two;
Fig. 4 is configured to the schematic diagram of UL Un subframe for DL subframe 3 among the embodiment three;
Fig. 5 is configured to the schematic diagram of UL Un subframe for DL subframe 3 among the embodiment four.
Embodiment
In the Un of the LTE-A system interface TDD HARQ sub-frame configuration, because the introducing of RN needs to give Un interface assignment ascending-descending subframes.And because the particularity of tdd frame structure, when the HARQ timing Design, each UL subframe all needs to carry the ACK/NACK feedback signaling of a plurality of DL subframes in some configuration.If the DL sub-frame allocation that will be associated with feedback signaling has been given Uu interface, and the UL sub-frame allocation that should carry the ACK/NACK feedback signaling of a plurality of DL subframes has been given Un interface, can cause the ACK/NACK feedback signaling of DL subframe to lose like this, promptly the Un interface does not receive the ACK/NACK feedback signaling of DL subframe.For the ACK/NACK feedback signaling that guarantees the DL subframe all obtains feedback, need more UL subframe so.And in the actual sub-frame allocation, often can distribute to the UL sub-frame resources scarcity of Un interface.In order to address this problem, the present invention is designed to a kind of novel UL Un subframe with the DL subframe and substitutes traditional TDD HARQ UL subframe, thereby solve the problem of Un interface disappearance UL subframe in the LTE-A system, avoided modification, made former LTE user in the LTE-A relay system, can obtain good compatibility former LTE User Agreement.
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail.
Embodiment one
Present embodiment provides a kind of collocation method of novel TDD HARQ UL Un subframe, is example with TDDHARQ configuration 2 shown in Figure 1.Among Fig. 1, subframe 0,1,5,6 need to transmit some special signalings, therefore can only be used for the Uu interface.And only there are two UL subframes 2 and 7 in this configuration.As can be seen from Figure 1, UL subframe 2 is fed back the ACK/NACK signaling of DL subframe 4,5,6,8 in former LTE agreement, and is subjected to 8 scheduling of DL subframe; UL subframe 7 is fed back the ACK/NACK signaling of DL subframe 9,0,1,3 in former LTE agreement, and is subjected to 3 scheduling of DL subframe.If UL subframe 2 and 7 is applied to the Uu interface, the Un interface will not have the UL subframe and can use so; If UL subframe 2 or 7 is applied to the Un interface, DL subframe 0,1 or 5,6 will lack the UL subframe of its ACK/NACK signaling of feedback so.Therefore, the present invention becomes novel UL Un subframe to substitute the communication that the UL subframe is finished Un the DL sub-frame configuration.
Next, consider that choosing suitable DL sub-frame configuration is novel UL Un subframe.Remove also remaining subframe 3,4,8,9 these 4 the DL subframes of DL subframe 0,1,5,6.Each subframe is made into the propagation delay time after the ULUn subframe as can be seen from Table 1.With subframe 3 is example, and when selecting subframe 3 as UL Un subframe for use, the feedback/scheduler latency of subframe 4 is 9ms, and the feedback/scheduler latency of subframe 8 is 5ms, and the feedback/scheduler latency of subframe 9 is 4ms.
Table 1: each subframe is made into the feedback/scheduling time delay table after the UL Un subframe
As known from Table 1, subframe 3 and feedback/scheduling time delay of 8 are less, can choose subframe 3 or 8 according to the DL sub-frame allocation situation of Un interface and do novel UL Un subframe.
According to minimum feedback time delay principle, be example with subframe 3, the process that is configured to novel UL Un subframe is as shown in Figure 2.
1, choose DL subframe 3 at the eNB end and be configured to novel UL Un subframe:
At first, preceding n OFDM symbol is used for transmitting physical downlink control channel (PDCCH), and it is multicast Single frequency network subframe (MBSFN) to inform grand user (macro UE);
Secondly, n+1 OFDM symbol is used for the conversion that is dealt into up receipts from descending, so from the upstream data of n+2 OFDM sign-on reception from RN.
2, at the RN end corresponding subframe 3 also is configured to UL Un subframe:
At first, preceding n+1 OFDM symbol is used to transmit PDCCH, and informs that this subframe of user that RN has jurisdiction over is the MBSFN subframe;
Secondly, n+2 OFDM sign-on sends the ACK/NACK feedback signaling of each DL subframe of Un interface end, and the UL data message that is scheduled is to eNB.
The present invention is designed to a kind of novel UL Un subframe with the DL subframe and substitutes traditional TDD HARQ UL subframe, thereby solve the problem of Un interface disappearance UL subframe in the LTE-A system, avoided modification, made former LTE user in the LTE-A relay system, can obtain good compatibility former LTE User Agreement.
Embodiment two
Present embodiment is configured to novel UL Un subframe according to embodiment one described collocation method with DL subframe 3, the schematic diagram of this novel UL Un subframe as shown in Figure 3, DL: UL=1 wherein: 1.
Embodiment three
The difference of present embodiment and embodiment two is: DL: UL=2: 1.
Embodiment four
The difference of present embodiment and embodiment two is: DL: UL=3: 1.
The method of the invention can be applied in other configurations of TDD HARQ, and relates in the different proportion of TDD subframe DL: UL configuration, also can be applied in other systems that need use the UL sub-frame configuration.
Here description of the invention and application is illustrative, is not to want with scope restriction of the present invention in the above-described embodiments.Here the distortion of disclosed embodiment and change are possible, and the various parts of the replacement of embodiment and equivalence are known for those those of ordinary skill in the art.Those skilled in the art are noted that under the situation that does not break away from spirit of the present invention or substantive characteristics, and the present invention can be with other forms, structure, layout, ratio, and realize with other elements, material and parts.
Claims (4)
1. the collocation method of a novel TDD HARQ UL Un subframe is characterized in that, said method comprising the steps of:
Step 1 is chosen the DL subframe according to minimum feedback time delay principle at the eNB end, and the described DL sub-frame configuration that is selected is become UL Un subframe;
Step 2 at the RN end, will become UL Un subframe with the described DL subframe corresponding D L sub-frame configuration that is selected, and finish the communication of Un in order to substitute the UL subframe.
2. the collocation method of novel TDD HARQ UL Un subframe according to claim 1 is characterized in that, in the step 1, holds the method that reconfigures of the described DL subframe that is selected to be at eNB:
Preceding n OFDM symbol of the described DL subframe that is selected is used for the transmitting physical downlink control channel, and informs that the described DL subframe that is selected of grand user is the MBSFN subframe;
N+1 OFDM symbol of the described DL subframe that is selected is used for the conversion that is dealt into up receipts from descending, receives upstream data from RN from n+2 OFDM sign-on.
3. the collocation method of novel TDD HARQ UL Un subframe according to claim 1 is characterized in that, in the step 2, holds the collocation method of corresponding DL subframe to be at RN:
Preceding n+1 OFDM symbol of corresponding DL subframe is used for the transmitting physical downlink control channel, and informs that the corresponding DL subframe of user that RN has jurisdiction over is the MBSFN subframe;
Corresponding DL subframe is held to eNB from the ACK/NACK feedback signaling of n+2 each DL subframe of OFDM sign-on transmission Un interface end and the UL data message that is scheduled.
4. according to the collocation method of any described novel TDD HARQ UL Un subframe of claim 1 to 3, it is characterized in that: the ratio of number and the number of UL Un subframe that is configured to the DL subframe of UL Un subframe is 1: 1,2: 1 or 3: 1.
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| CN103944666A (en) * | 2013-01-18 | 2014-07-23 | 上海贝尔股份有限公司 | Subframe collocation method and device |
| CN104135352A (en) * | 2013-05-03 | 2014-11-05 | 宏达国际电子股份有限公司 | Communication system and method using dynamic time division duplex configuration mechanism |
| CN104811955A (en) * | 2014-01-24 | 2015-07-29 | 宏达国际电子股份有限公司 | Method for configuring table in LTE TDD system and apparatus using the same |
| CN107409405A (en) * | 2015-03-15 | 2017-11-28 | 高通股份有限公司 | Self-contained time division duplex (tdd) subframe structure |
| CN108632790A (en) * | 2017-03-24 | 2018-10-09 | 中兴通讯股份有限公司 | A kind of resource allocation method and device |
| US11026245B2 (en) | 2015-03-15 | 2021-06-01 | Qualcomm Incorporated | Mission critical data support in self-contained time division duplex (TDD) subframe structure |
| US11122583B2 (en) | 2015-05-15 | 2021-09-14 | Qualcomm Incorporated | Scaled symbols for a self-contained time division duplex (TDD) subframe structure |
| US11470625B2 (en) | 2015-07-20 | 2022-10-11 | Qualcomm Incorporated | Time division duplex (TDD) subframe structure supporting single and multiple interlace modes |
| US11950241B2 (en) | 2015-03-15 | 2024-04-02 | Qualcomm Incorporated | Self-contained time division duplex (TDD) subframe structure for wireless communications |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103944666A (en) * | 2013-01-18 | 2014-07-23 | 上海贝尔股份有限公司 | Subframe collocation method and device |
| CN104135352A (en) * | 2013-05-03 | 2014-11-05 | 宏达国际电子股份有限公司 | Communication system and method using dynamic time division duplex configuration mechanism |
| CN104135352B (en) * | 2013-05-03 | 2017-10-13 | 宏达国际电子股份有限公司 | Use the communication system and method for the duplexing configuration mechanism of dynamic Time Division |
| CN104811955A (en) * | 2014-01-24 | 2015-07-29 | 宏达国际电子股份有限公司 | Method for configuring table in LTE TDD system and apparatus using the same |
| CN104811955B (en) * | 2014-01-24 | 2018-07-27 | 宏达国际电子股份有限公司 | The method of LTE TDD system configuration forms and the device for using this method |
| US11622361B2 (en) | 2015-03-15 | 2023-04-04 | Qualcomm Incorporated | Mission critical data support in self-contained time division duplex (TDD) subframe structure |
| CN107409405A (en) * | 2015-03-15 | 2017-11-28 | 高通股份有限公司 | Self-contained time division duplex (tdd) subframe structure |
| US11950241B2 (en) | 2015-03-15 | 2024-04-02 | Qualcomm Incorporated | Self-contained time division duplex (TDD) subframe structure for wireless communications |
| CN107409405B (en) * | 2015-03-15 | 2021-04-27 | 高通股份有限公司 | Self-contained Time Division Duplex (TDD) subframe structure |
| US11026245B2 (en) | 2015-03-15 | 2021-06-01 | Qualcomm Incorporated | Mission critical data support in self-contained time division duplex (TDD) subframe structure |
| US11122583B2 (en) | 2015-05-15 | 2021-09-14 | Qualcomm Incorporated | Scaled symbols for a self-contained time division duplex (TDD) subframe structure |
| US11470625B2 (en) | 2015-07-20 | 2022-10-11 | Qualcomm Incorporated | Time division duplex (TDD) subframe structure supporting single and multiple interlace modes |
| CN108632790A (en) * | 2017-03-24 | 2018-10-09 | 中兴通讯股份有限公司 | A kind of resource allocation method and device |
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| CN102271016B (en) | 2015-09-23 |
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