CN101400140B - Method and apparatus for lowering cost of uplink scheduling control signaling - Google Patents
Method and apparatus for lowering cost of uplink scheduling control signaling Download PDFInfo
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Abstract
The invention discloses a method of reducing spending of up scheduling control siganlling, comprising: in a wireless frame, setting N up TTI through combining up sub-frames by a base station Node , setting unique corresponding down TTI for each up TTI, wherein N is smaller than or equal to the number of the down TTI presupposed by the system; transmitting the up scheduling control signalling of each up TTI carried in the down TTI uniquely corresponding in the up TTI; acquiring setting mode of the up TTI and corresponding relation between the up TTI and the down TTI, according to the corresponding relation of N up TTI and the up TTI and the down TTI, extracting the up scheduling control signalling of each up TTI in the receiving down frame, performing resource scheduling. The invention alsodiscloses a base station and a user terminal. According to the invention, control channel availability of the TDD system is increased.
Description
Technical field
The present invention relates to the time division duplex technology, particularly a kind of method and device that reduces ascending scheduling control signaling overhead.
Background technology
3-G (Generation Three mobile communication system) (3G) adopts the CDMA multi-access mode, supports multimedia service, has higher competitiveness.In order to ensure keep this competitiveness in the longer time, 3GPP has started Long Term Evolution (Long Term Evolution, the LTE) research project of 3G wireless interface technology.
At present, the LTE system determines to support 2 kinds of frame structures.First kind frame structure is supported Frequency Division Duplexing (FDD) (FDD) and two kinds of duplex modes of time division duplex (TDD) as shown in Figure 1.Wherein, the frame length of a radio frames is 10ms, comprises 20 time slots altogether, and time slot mark from 0 to 19, every slot length are 0.5ms, and two continuous time slot are defined as a subframe, and subframe i is made up of time slot 2i and 2i+1, i=0 wherein, and 1 ..., 9.
The second class frame structure is only supported the TDD duplex mode as shown in Figure 2.Wherein, the frame length of a radio frames is 10ms, comprises the field of two 5ms.Each field is made up of 7 business time-slots (being labeled as 0～6) and 3 special time slots (descending pilot frequency time slot, protection is time slot and uplink pilot time slot at interval).Every subframe definition is a business time-slot.Wherein, subframe 0 and descending pilot frequency time slot always are used for downlink transfer, and uplink pilot time slot and subframe 1 always are used for uplink.
In the LTE system, Transmission Time Interval (TTI), be meant the once transmission time from start to end, usually TTI is the duration of a subframe, scheduling of resource is that unit carries out with TTI, just be that unit carries out with the subframe, and the scheduling of resource of up-downgoing is finished by base station (NodeB), therefore, the ascending scheduling control signaling that is used for carrying out ascending resource scheduling transmits at the descending control signaling that NodeB sends to user terminal (UE).
Particularly, under current LTE system, utilize the individual modulation symbol transmitting downlink control signal of preceding m (m≤3) of each descending sub frame.Wherein, can comprise uplink scheduling signaling in this descending control signaling at certain sub-frame of uplink.Specifically under the LTE system, the modulation system of physical layer is OFDM (OFDM), so the modulation symbol in the descending sub frame is the OFDM symbol, just transmitting downlink control signal in preceding m OFDM symbol of descending sub frame.
For LTE FDD system, because up-downgoing separates on frequency domain, ascending-descending subframes has implied relation one to one, so the ascending scheduling control signaling that transmits in each descending sub frame has impliedly been determined corresponding sub-frame of uplink.
But for LTE TDD system, because it supports non-symmetrical service, often the setting of ascending-descending subframes number is unequal, may not have relation one to one.When the sub-frame of uplink number is counted greater than descending sub frame, must there be at least one descending sub frame need transmit the uplink scheduling signaling of an above sub-frame of uplink.So, for the descending sub frame of uplink scheduling signaling of an above sub-frame of uplink of transmission, once just need utilize in the transmission arbitrarily extra indication bit indicate this time transmission the uplink scheduling signaling at sub-frame of uplink.
Especially, by the up-downgoing switching point is set, proportion of ascending subframe and descending subframe can be set arbitrarily.And according to the difference of ascending-descending subframes ratio, the indication bit number that needs in the descending sub frame also may be different.Specifically there is dual mode that bit number is set, the ascending-descending subframes ratio that adaptation may change.
A kind of mode is: at every kind of proportion of ascending subframe and descending subframe, adopt the least number of bits indication.This mode efficient is higher, but will cause the various control channel format.
Another kind of mode is: select in all ascending-descending subframes ratios, the situation that required bit number is maximum is provided with indication bit, and this mode only need increase a kind of control channel form, but has reduced channel utilization.
In a word, in LTE TDD system, when the sub-frame of uplink number is counted greater than descending sub frame, need extra control channel expense to indicate the pairing sub-frame of uplink of ascending scheduling control signaling at present.
Summary of the invention
In view of this, the invention provides a kind of method and apparatus that reduces ascending scheduling control signaling overhead, can improve the channel utilization of control channel.
For achieving the above object, the present invention adopts following technical scheme:
A kind of method that reduces ascending scheduling control signaling overhead comprises:
In a radio frames, base station node B is provided with N up TTI according to the ascending-descending subframes ratio by merging sub-frame of uplink, and described N is smaller or equal to the number of the descending TTI of systemic presupposition;
The descending TTI of unique correspondence is set for each the up TTI that is provided with;
To be carried at the ascending scheduling control signaling of each up TTI among the descending TTI of the unique correspondence of this up TTI and send.
Preferably, described merging sub-frame of uplink is: determine the sub-frame of uplink number that each TTI comprises according to business need.
Preferably, high more to the delay requirement of up TTI, the number of sub frames that this up TTI comprises is few more; Delay requirement to up TTI is low more, and the number of sub frames that this up TTI comprises is many more;
System is high more to the coverage requirement of up TTI, and the number of sub frames that this up TTI comprises is many more; System is low more to the coverage requirement of up TTI, and the number of sub frames that this up TTI comprises is few more.
Preferably, this method further comprises: in NodeB, in advance at various ascending-descending subframes ratios, the set-up mode of corresponding collocating uplink TTI;
Described NodeB is provided with N up TTI: according to the described set-up mode of current ascending-descending subframes ratio correspondence, N up TTI is set.
Preferably, described NodeB for the descending TTI that each up TTI is provided with unique correspondence is: according to up TTI that is provided with in NodeB in advance and the corresponding relation of descending TTI, the descending TTI of unique correspondence is set for each up TTI.
A kind of method that reduces ascending scheduling control signaling overhead comprises:
User terminal UE obtains the set-up mode of N up TTI and the corresponding relation of up TTI and descending TTI; Described N up TTI be NodeB according to the ascending-descending subframes ratio, sub-frame of uplink is provided with by merging in a radio frames, described N is smaller or equal to the number of the descending TTI of systemic presupposition;
According to the set-up mode of the up TTI that obtains and the corresponding relation of up TTI and descending TTI, in the downlink frame that receives, extract ascending scheduling control signaling to each up TTI, carry out ascending resource scheduling.
Preferably, described UE obtains the set-up mode of up TTI and is:
In advance at various ascending-descending subframes ratios, the set-up mode of corresponding collocating uplink TTI, and according to the indicated current ascending-descending subframes ratio of NodeB is determined corresponding described set-up mode in UE;
Perhaps, receive the up TTI set-up mode that NodeB issues by broadcasting or high-level signaling.
Preferably, the mode that described UE obtains up TTI and descending TTI corresponding relation is: pre-configured in UE, perhaps, receive the described corresponding relation that NodeB issues by broadcasting or high-level signaling.
A kind of base station node B comprises:
Up TTI is provided with the unit, be used for according to the ascending-descending subframes ratio, by merging sub-frame of uplink N up TTI is set, the descending TTI of unique correspondence is set for each up TTI, described N is smaller or equal to the number of the descending TTI of systemic presupposition, and the corresponding relation of up TTI and descending TTI is offered the ascending scheduling control signaling transmitting element;
The ascending scheduling control signaling transmitting element is used for according to up TTI up TTI that the unit provides and the corresponding relation of descending TTI being set, and will be carried at the ascending scheduling control signaling of each up TTI among the descending TTI of the unique correspondence of this up TTI to send.
A kind of user terminal UE comprises:
Up TTI acquiring unit, be used to obtain and preserve the set-up mode of N up TTI and the corresponding relation of up TTI and descending TTI, and offer the ascending resource scheduling unit, described N up TTI is that NodeB is according to the ascending-descending subframes ratio, sub-frame of uplink is provided with by merging in a radio frames, and described N is smaller or equal to the number of the descending TTI of systemic presupposition;
The ascending resource scheduling unit, the set-up mode of the up TTI that provides according to up TTI acquiring unit and the corresponding relation of up TTI and descending TTI are provided, in the downlink frame that receives, extract ascending scheduling control signaling, carry out ascending resource scheduling each up TTI.
As seen from the above technical solution, among the present invention, on the one hand, in the NodeB side, can by merging sub-frame of uplink N up TTI be set according to the ascending-descending subframes ratio, wherein, N is the positive integer smaller or equal to descending TTI number in the system, and the descending TTI of unique correspondence is set for each up TTI.Because the number N of the up TTI after being provided with smaller or equal to the number of descending TTI in the system, therefore can be set up the one-to-one relationship of up-downgoing TTI.Then, when sending ascending scheduling control signaling, will be carried at the ascending scheduling control signaling of each up TTI among the descending TTI of this up TTI correspondence and send.On the other hand, in the UE side, obtain the one-to-one relationship of set-up mode and the up-downgoing TTI of up TTI among the NodeB, receiving after NodeB sends to downlink frame, one-to-one relationship according to set-up mode and the up-downgoing TTI of the capable TTI that obtains, extraction is carried out ascending resource scheduling to the ascending scheduling control signaling of each up TTI.This shows, mode of the present invention can be carried out normal scheduling of resource, simultaneously because each up TTI has its each self-corresponding descending TTI, therefore when the transmission ascending scheduling control signaling, directly carrying ascending scheduling control signaling gets final product, not needing increases the TTI that extra indication bit indicates this ascending scheduling control signaling to dispatch, thereby has improved the control channel utilance of TDD system.
Description of drawings
Fig. 1 is the first kind frame structure schematic diagram of LTE system;
Fig. 2 is the second class frame structure schematic diagram of LTE system;
Fig. 3 is the method particular flow sheet that reduces ascending scheduling control signaling overhead in the embodiment of the invention one;
Fig. 4 is the method particular flow sheet that reduces ascending scheduling control signaling overhead in the embodiment of the invention two;
Fig. 5 is for carrying out the schematic diagram that up TTI is provided with in the embodiment of the invention two;
Fig. 6 is applied to the schematic diagram in the first kind frame structure of LTE system for the inventive method;
Fig. 7 is the concrete structure figure of NodeB provided by the invention;
Fig. 8 is the concrete structure figure of UE provided by the invention.
Embodiment
For making purpose of the present invention, technological means and advantage clearer, the present invention is described in further details below in conjunction with accompanying drawing.
Basic thought of the present invention is: the descending TTI that unique correspondence is set for each up TTI, thereby the descending TTI that directly utilizes up TTI correspondence carries the ascending scheduling control signaling of this up TTI, avoid increasing the TTI that extra indication bit is indicated uplink scheduling, to improve the control channel utilance.
Specifically in implementation process of the present invention,, guarantee the number of the number of up TTI smaller or equal to descending TTI in the system by setting to up TTI.Especially, when the sub-frame of uplink number is counted greater than descending sub frame, the part sub-frame of uplink is merged into a TTI, thereby guarantee the number of the number of up TTI smaller or equal to descending TTI in the system.
In embodiment, the mode that being provided with of up TTI can be adopted fixed configurations or adopt mode according to the state of affairs flexible configuration.Below by specific embodiment explanation dual mode.
Embodiment one:
In the present embodiment, the employing fixed configurations mode that is provided with of up TTI.
Fig. 3 is the method particular flow sheet that reduces ascending scheduling control signaling overhead in the embodiment of the invention one.As shown in Figure 3, this method comprises:
Wherein, comprise the sub-frame of uplink that number N that up TTI is set and each up TTI comprise for the setting of up TTI, and the number N of up TTI should be smaller or equal to the number of descending TTI.
Owing to work as the ascending-descending subframes ratio not simultaneously, the number of descending TTI is also different, so set-up mode and the up TTI of up TTI all carries out according to the different of ascending-descending subframes ratio with the correspondence setting of descending TTI in the present embodiment.
For example, table 1 is a kind of up TTI and up-downgoing TTI mapping table of fixed configurations, this table designs at the second class frame format, wherein, the TS0～TS6 of form first row represents the subframe numbers as descending sub frame, and the TS1～TS6 in the remaining row represents the subframe numbers as sub-frame of uplink, up TTI utilizes ETS to represent, "-" represents that the descending sub frame of these row number does not exist, and promptly this subframe is a sub-frame of uplink, and " 0 " represents the not corresponding up TTI of the represented descending TTI of the descending sub frame of these row.
As shown in table 1, when the ascending-descending subframes ratio is 6: 1,6 sub-frame of uplink are merged into a up TTI-ETS1, and it is corresponding with unique descending TTI-TS0 that this ETS1 is set; When the ascending-descending subframes ratio is 5: 2, sub-frame of uplink TS1 is corresponding with the TTI of descending sub frame TS6 representative as a TTI, (TS2～TS5) merge into a up TTI-ETS2, it is corresponding with the TTI of descending sub frame TS0 representative that this TTI is set with 4 sub-frame of uplink.And the like, the content in the table 1 has promptly embodied the fixed configurations relation, promptly under each ascending-descending subframes ratio, and the set-up mode of up TTI and up-downgoing TTI corresponding relation.Table 1 is kept among NodeB and the UE.
| TS1 | TS2 | TS3 | TS4 | TS5 | TS6 | TS0 | |
| 1∶6 | - | 0 | 0 | 0 | 0 | 0 | ETS1(TS1) |
| 2∶5 | - | - | 0 | 0 | 0 | ETS1 (TS1) | ETS2(TS2) |
| TS1 | TS2 | TS3 | TS4 | | TS6 | TS0 | ||
| 3∶4 | - | - | - | 0 | ETS1 (TS1) | ETS2 (TS2) | ETS3(TS3) | |
| 4∶3 | - | - | - | - | ETS1 (TS1) | ETS2 (TS2) | ETS3 (comprising TS3﹠TS4) | |
| 5∶2 | - | - | - | - | - | ETS1 (TS1) | ETS2 (comprising TS2, TS3, TS4﹠ TS5) | |
| 6∶1 | - | - | - | - | - | - | ETS1 (comprise TS1, TS2, TS3, TS4, TS5﹠TS6) |
Table 1
By above-mentioned table 1 as seen, in the present embodiment, when the sub-frame of uplink number was counted greater than descending sub frame, the up TTI number N of setting equated with the descending sub frame number all the time, and, when the sub-frame of uplink number is counted greater than descending sub frame, do not carry out the merging of sub-frame of uplink.In fact, the number N of up TTI also can be less than the descending sub frame number, and when the sub-frame of uplink number was counted less than sub-frame of uplink, the merging that also can carry out sub-frame of uplink was to form a up TTI.For example, be 5: 2 o'clock in the ascending-descending subframes ratio, ETS1 can be set comprise TS1～TS5, and corresponding with any one descending TTI; In the ascending-descending subframes ratio is 2: 5 o'clock, ETS1 can be set comprise TS1～TS2, and corresponding with any one descending TTI.
Along with the operation of system, the ascending-descending subframes ratio may change.When the ascending-descending subframes ratio changed, NodeB and UE obtained current ascending-descending subframes ratio, and according to ascending-descending subframes ratio that is provided with in the step 301 and the corresponding relation of up TTI, i.e. table 1, determine under the current ascending-descending subframes ratio, the set-up mode of up TTI, and finish setting.
UE can obtain current ascending-descending subframes ratio by the configuration messages that NodeB issues, and according to the content of table 1, determines under the current ascending-descending subframes ratio corresponding relation of the set-up mode of up TTI and up TTI and descending TTI.
Under the current ascending-descending subframes ratio of determining according to step 302, the corresponding relation of up TTI and descending TTI is carried at ascending scheduling control signaling among the descending TTI of correspondence and is transferred to UE.
In this step, UE is according under the current ascending-descending subframes ratio of determining in the step 303, and the corresponding relation of the set-up mode of up TTI and up TTI and descending TTI extracts the ascending scheduling control signaling of each up TTI, and carries out scheduling of resource.When carrying out scheduling of resource, carry out scheduling of resource according to current up TTI set-up mode, for example, if current up-downgoing ratio is 6: 1, then according to the corresponding relation of table 1, the TTI of current scheduling unit comprises 6 sub-frame of uplink, needs so 6 sub-frame of uplink are dispatched as a Resource Block, carries out in the duration of 6 sub-frame of uplink during the transmission data.
So far, the method flow of the embodiment of the invention finishes.In the present embodiment, the corresponding relation of the setting of up TTI and up-downgoing TTI adopts the mode of fixed configurations to carry out, this mode helps the simplified system design, handle simple, but very flexible, can't adjust the set-up mode of up TTI and the corresponding relation of up-downgoing TTI according to business need (for example the difference to time delay requires), with further raising systematic function.
Embodiment two:
In the present embodiment, the employing flexible configuration mode that is provided with of up TTI.
Fig. 4 is the method particular flow sheet that reduces ascending scheduling control signaling overhead in the embodiment of the invention two.As shown in Figure 4, this method comprises:
In this step, the setting of up TTI comprises the number N that up TTI is set and the sub-frame of uplink that comprises among each TTI is set.Wherein, when the number N of up TTI is set, carry out according to the ascending-descending subframes ratio of current system.When the sub-frame of uplink that each up TTI comprises is set, carry out according to the business need of system.
Particularly, determine relation between the ascending-descending subframes number according to the ascending-descending subframes ratio, and when N is set, guarantee that N is smaller or equal to descending TTI number.For example, when the ascending-descending subframes ratio was 4: 3, it was 3 or 2 or 1 that up TTI number can be set.
In embodiment one, at fixing ascending-descending subframes ratio, the sub-frame of uplink that each corresponding up TTI comprises is determined.But in fact, even the ascending-descending subframes ratio determines that the sub-frame of uplink that each up TTI comprises also can have multiple possibility.In the present embodiment, when the sub-frame of uplink that comprises being set, can select different up TTI configurations according to the different business requirement of system for each up TTI.For example, when when higher, making this up TTI comprise less sub-frame of uplink number to the delay requirement of certain TTI; When the covering power that can provide certain TTI is had relatively high expectations, make this up TTI comprise more sub-frame of uplink number.
With Fig. 5 is example, the ascending-descending subframes ratio is 5: 2, the 1st line display among Fig. 5 carries out the ascending scheduling control signaling transmission manner according to background technology, the 2nd row carries out the ascending scheduling control signaling transmission manner to the 5th line display according to mode of the present invention, wherein N can be set to 2 or 1, has five kinds of different TTI configuration modes.Particularly,
Situation 1: can be with TS1 as ETS1, with TS2, TS3, TS4 and TS5 merge into ETS2, then can the corresponding ETS1 of TS6, the corresponding ETS2 of TS0.
Situation 2: TS1 and TS2 are merged into ETS1, TS3, TS4 and TS5 merge into ETS2, then can TS6 corresponding ETS1, the corresponding ETS2 of TS0.
Situation 3: with TS1, TS2 and TS3 merge into ETS1, and TS4 and TS5 merge into ETS2, then can TS6 corresponding ETS1, the corresponding ETS2 of TS0.
Situation 4: with TS1, TS2, TS3 and TS4 merge into ETS1, with TS5 as ETS2, then can TS6 corresponding ETS1, the corresponding ETS2 of TS0.
Situation 5: with TS1, TS2, TS3, TS4 merges into ETS1, then can TS6 corresponding ETS1, the perhaps corresponding ETS1 of TS0, another descending sub frame does not have corresponding up TTI.
Step 402 is provided with the descending TTI of unique correspondence for each up TTI.
In this step, for N the up TTI that is provided with in the step 401 is provided with each self-corresponding descending TTI.The corresponding relation of this up-downgoing TTI can be specified when system design, in system's running, the corresponding relation according to this appointment is that up TTI is provided with corresponding descending TTI all the time, perhaps, also can in system's running, the corresponding relation of up TTI and descending TTI be set in real time.
In this step, NodeB can be carried at the corresponding relation of the set-up mode of current up TTI and up TTI and descending TTI in broadcast or the high-level signaling (for example MAC signaling, RNC signaling etc.) and send to UE.
Perhaps,, then the corresponding relation of up-downgoing TTI can be kept among the UE, needn't send to UE by NodeB if the corresponding relation of up-downgoing TTI is finished appointment when system design.
Step 404～405, when needs carry out ascending resource scheduling, NodeB will be carried at the ascending scheduling control signaling of each up TTI among the descending TTI of this up TTI correspondence and transmit; UE receives downlink frame, extracts the ascending scheduling control signaling of each up TTI, and carries out scheduling of resource.
The concrete operations of step 404～405 are identical with step 304～305 among the embodiment one, just repeat no more here.
So far, the method flow of the embodiment of the invention two finishes.In the present embodiment, therefore being provided with of up TTI can further improve systematic function according to the business need flexible configuration, improves user experience.
In addition, ascending scheduling control signaling of the present invention goes for the frame structure of TDD form, for LTE TDD system, all is suitable for for the first kind frame format and the second class frame format.Above-mentioned is the explanation that example is carried out with the second class frame format all, identical for the execution mode of first kind frame format.For example, situation shown in Figure 6, in a radio frames, subframe 0 and subframe 5 are descending sub frame, all the other are sub-frame of uplink, then subframe 1～subframe 4 can be merged into a up TTI, and are corresponding with subframe 0; Subframe 6～subframe 9 is merged into a up TTI, corresponding with subframe 5.As seen, the present invention all is suitable for for two kinds of frame formats of LTE TDD system.In fact, all can utilize mode of the present invention to carry out the transmission of ascending scheduling control signaling, and, be not limited in the OFDM modulation system in the LTE system the code modulation mode and the no requirement (NR) of physical layer for the TDD system.
In above-mentioned two embodiment, respectively fixed configurations mode and flexible configuration mode are had been described in detail.In fact, two kinds of configuration modes can also be combined, for example, can adopt (comprise the number that up TTI is set and the sub-frame of uplink that comprises among each up TTI is set) mode of fixed configurations for the set-up mode of N up TTI, adopt the mode of flexible configuration for the corresponding relation of up-downgoing TTI; Perhaps, can adopt (comprise the number that up TTI is set and the sub-frame of uplink that comprises among each up TTI is set) mode of flexible configuration, adopt the mode of fixed configurations for the corresponding relation of up-downgoing TTI for the set-up mode of N up TTI.
When adopting the fixed configurations mode in NodeB, the UE side can be by receiving mode that NodeB issues or the mode that adopts fixed configurations; When adopting the flexible configuration mode in NodeB, the UE side must be obtained corresponding configuration in the mode that issues by reception NodeB.
The above-mentioned method embodiment that is reduction ascending scheduling control signaling overhead provided by the invention.The present invention also provides NodeB and the UE that reduces ascending scheduling control signaling overhead.Particularly, Fig. 7 and Fig. 8 are respectively the concrete structure figure of NodeB provided by the invention and UE.
As shown in Figure 7, NodeB comprises that up TTI is provided with unit and ascending scheduling control signaling transmitting element.Wherein, up TTI is provided with the unit, is used to be provided with N up TTI, and the descending TTI of unique correspondence is set for each up TTI, described N is smaller or equal to the number of the descending TTI of systemic presupposition, and the corresponding relation of up TTI and descending TTI is offered the ascending scheduling control signaling transmitting element.
The ascending scheduling control signaling transmitting element is used for according to up TTI up TTI that the unit provides and the corresponding relation of descending TTI being set, and will be carried at the ascending scheduling control signaling of each up TTI among the descending TTI of the unique correspondence of this up TTI to send.
As shown in Figure 8, UE comprises up TTI acquiring unit and ascending resource scheduling unit.Wherein, up TTI acquiring unit, be used to obtain and preserve the set-up mode of N up TTI and the corresponding relation of up TTI and descending TTI, and to offer the described N in ascending resource scheduling unit up TTI be that NodeB is according to the ascending-descending subframes ratio, sub-frame of uplink is provided with by merging in a radio frames, and described N is smaller or equal to the number of the descending TTI of systemic presupposition.
The ascending resource scheduling unit, the set-up mode of the up TTI that provides according to up TTI acquiring unit and the corresponding relation of up TTI and descending TTI are provided, in the downlink frame that receives, extract ascending scheduling control signaling, carry out ascending resource scheduling each up TTI.
Being preferred embodiment of the present invention only below, is not to be used to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a method that reduces ascending scheduling control signaling overhead is characterized in that, this method comprises:
In a radio frames, base station node B is provided with N up TTI according to the ascending-descending subframes ratio by merging sub-frame of uplink, and described N is smaller or equal to the number of the descending TTI of systemic presupposition;
The descending TTI of unique correspondence is set for each the up TTI that is provided with;
To be carried at the ascending scheduling control signaling of each up TTI among the descending TTI of the unique correspondence of this up TTI and send.
2. method according to claim 1 is characterized in that, described merging sub-frame of uplink is: determine the sub-frame of uplink number that each TTI comprises according to business need.
3. method according to claim 2 is characterized in that, and is high more to the delay requirement of up TTI, and the number of sub frames that this up TTI comprises is few more; Delay requirement to up TTI is low more, and the number of sub frames that this up TTI comprises is many more;
System is high more to the coverage requirement of up TTI, and the number of sub frames that this up TTI comprises is many more; System is low more to the coverage requirement of up TTI, and the number of sub frames that this up TTI comprises is few more.
4. method according to claim 1 is characterized in that, this method further comprises: in NodeB, in advance at various ascending-descending subframes ratios, the set-up mode of corresponding collocating uplink TTI;
Described NodeB is provided with N up TTI: according to the described set-up mode of current ascending-descending subframes ratio correspondence, N up TTI is set.
5. method according to claim 1, it is characterized in that, described NodeB for the descending TTI that each up TTI is provided with unique correspondence is: according to up TTI that is provided with in NodeB in advance and the corresponding relation of descending TTI, the descending TTI of unique correspondence is set for each up TTI.
6. a method that reduces ascending scheduling control signaling overhead is characterized in that, this method comprises:
User terminal UE obtains the set-up mode of N up TTI and the corresponding relation of up TTI and descending TTI; Described N up TTI be NodeB according to the ascending-descending subframes ratio, sub-frame of uplink is provided with by merging in a radio frames, described N is smaller or equal to the number of the descending TTI of systemic presupposition;
According to the set-up mode of the up TTI that obtains and the corresponding relation of up TTI and descending TTI, in the downlink frame that receives, extract ascending scheduling control signaling to each up TTI, carry out ascending resource scheduling.
7. method according to claim 6 is characterized in that, the set-up mode that described UE obtains up TTI is:
In advance at various ascending-descending subframes ratios, the set-up mode of corresponding collocating uplink TTI, and according to the indicated current ascending-descending subframes ratio of NodeB is determined corresponding described set-up mode in UE;
Perhaps, receive the up TTI set-up mode that NodeB issues by broadcasting or high-level signaling.
8. method according to claim 6 is characterized in that, the mode that described UE obtains up TTI and descending TTI corresponding relation is: pre-configured in UE, perhaps, receive the described corresponding relation that NodeB issues by broadcasting or high-level signaling.
9. a base station node B is characterized in that, this NodeB comprises:
Up TTI is provided with the unit, be used for according to the ascending-descending subframes ratio, by merging sub-frame of uplink N up TTI is set, the descending TTI of unique correspondence is set for each up TTI, described N is smaller or equal to the number of the descending TTI of systemic presupposition, and the corresponding relation of up TTI and descending TTI is offered the ascending scheduling control signaling transmitting element;
The ascending scheduling control signaling transmitting element is used for according to up TTI up TTI that the unit provides and the corresponding relation of descending TTI being set, and will be carried at the ascending scheduling control signaling of each up TTI among the descending TTI of the unique correspondence of this up TTI to send.
10. a user terminal UE is characterized in that, this UE comprises:
Up TTI acquiring unit, be used to obtain and preserve the set-up mode of N up TTI and the corresponding relation of up TTI and descending TTI, and offer the ascending resource scheduling unit, described N up TTI is that NodeB is according to the ascending-descending subframes ratio, sub-frame of uplink is provided with by merging in a radio frames, and described N is smaller or equal to the number of the descending TTI of systemic presupposition;
The ascending resource scheduling unit, the set-up mode of the up TTI that provides according to up TTI acquiring unit and the corresponding relation of up TTI and descending TTI are provided, in the downlink frame that receives, extract ascending scheduling control signaling, carry out ascending resource scheduling each up TTI.
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| CN101409582B (en) * | 2007-10-09 | 2012-05-23 | 电信科学技术研究院 | Method and apparatus for reducing ascending scheduling control signaling overhead |
| CN106413106B (en) | 2015-07-28 | 2019-09-17 | 电信科学技术研究院 | A kind of transmission method and device of upstream data |
| CN109479264B (en) * | 2016-03-31 | 2021-01-05 | 华为技术有限公司 | Uplink data sending method, uplink data scheduling method and device |
| CN106028452B (en) * | 2016-05-23 | 2019-10-22 | 宇龙计算机通信科技(深圳)有限公司 | A kind of method and device configuring ascending-descending subframes |
| CN106793102B (en) * | 2016-05-31 | 2020-02-11 | 北京展讯高科通信技术有限公司 | System configuration indication method and device |
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