CN104219018A - TTI binding based LTE uplink transmission method, LTE base station and LTE system - Google Patents
TTI binding based LTE uplink transmission method, LTE base station and LTE system Download PDFInfo
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Abstract
The present invention discloses a TTI binding based LTE uplink transmission method, an LTE base station and an LTE system. The method comprises: the base station setting different transmission time interval (TTI) binding sizes for user terminals in the edge area of a cell according to a channel quality of a wireless channel, wherein the better the channel quality is, the smaller the TTI binding size is, the poorer the channel quality is, the larger the TTI binding size is, and the TTI binding size is the number of the TTIs of a carrying data block; the base station triggering user terminal TTI binding and sending TTI binding configuration information to the user terminal, the TTI binding configuration information containing information about set TTI binding sizes; the user terminal sending PUSCH data information according to the TTI binding configuration information. The technical solution provided in the present invention enhances the coverage capability of physical uplink shared channels in the edge area of the cell.
Description
Technical field
The present invention relates to wireless communication field, particularly a kind of LTE ascending transmission method based on TTI binding, base station and system.
Background technology
Along with the development of wireless communication technology, the performance of mobile terminal also constantly promotes, and impels the demand of the high-rate service based on mobile Internet more and more obvious.Such as in an uplink transmission, become wireless air interface for the transmission of the medium-rate business of peripheral speed 384kbps and must ensure one of business.In order to reduce time delay end to end, the Transmission Time Interval (Transmission Time Interval, TTI) that LTE system is eated dishes without rice or wine by Long Term Evolution (LTE, Long Term Evolution) standard is defined as 1ms.But, adopt the TTI of 1ms, make the subscriber equipment of cell edge (terminal) (UE, User Equipment) enough information energies cannot be transmitted in single TTI, the thresholding needed for the demodulation of medium-rate service uplink can not be reached, thus bring cell edge to cover limited problem.
In order to reach the object reducing time delay and promote MPS process simultaneously, in traditional solution, by carrying out segmentation at wireless spread-spectrum technology (Radio Link Control, RLC) layer, then transmit these segmentations by multiple TTI.Due to after RLC segmentation, the source bits of each TTI transmission is less, reduces the packet of physical layer transmission, thus by reducing Physical Resource Block (the Physical Resource Block of transfer of data, PRB) number and code check improve data transmission credibility, enhance MPS process.
But, RLC segmentation method increases overhead significantly, such as, the control signal expense of RLC/MAC header overhead, Resourse Distribute, multiple hybrid automatic repeat-request (HARQ, Hybrid Automatic Repeat reQuest) the correct response (ACK of process, Acknowledgement)/negative response (NACK, Negative Acknowledgement) feedback overhead.These extra expenses can direct influential system efficiency, also brings the ACK/NACK transmission error of multiple HARQ process simultaneously.
In order to improve uplink cells edges cover, in LTE version 8, introduce TTI binding technology for Physical Uplink Shared Channel (PUSCH, Physical Uplink Shared Channel).The core concept of TTI binding technology is: for a transmission block, by cyclic redundancy check (CRC) (CRC, Cyclic Redundancy Check), chnnel coding forms the different redundancy versions of 4 rate-matched modes, 4 different redundancy versions transmit respectively in 4 continuous print TTI.
Shown in Figure 1, Fig. 1 illustrates TTI binding technology schematic diagram of the prior art.The corresponding same HARQ process of 4 TTI in 1 binding, base station only produces HARQ feedback to last TTI, and namely 4 TTI just produce a HARQ feedback after receiving.If correct demodulation and need to retransmit is failed in some TTI binding, then retransmitting also is the binding of 4 continuous T TI.Such as, what VoIP uploaded transmits in units of TTI subframe by the speech business of IP packet form; The data message that during 4 TTI bindings, each TTI transmission is the same, but data message adopts different RV(coding form) version, for obtaining higher performance gain when receiving terminal merges.
But the TTI binding of above-mentioned LTE existing version must be that unit is bound for 4 TTI, namely binds size and is fixed as 4 TTI.But to the UE being in community diverse location, communication channel quality can difference to some extent, and fixing TTI binds size, can not mate the different channels quality that UE has well.Such as, when the channel quality of certain edge UE is relatively better, 4 TTI bindings can bring the waste of resource, reduce system effectiveness; When the channel quality of certain edge UE is poor especially, 4 TTI bindings still can not ensure the correct demodulation of UE data.Visible existing scheme, cannot enhance the covering power of cell edge Physical Uplink Shared Channel.
Summary of the invention
According to an aspect of the embodiment of the present invention, a technical problem to be solved is: provide a kind of LTE ascending transmission method based on TTI binding, base station and system, to enhance the covering power of cell edge Physical Uplink Shared Channel.
A kind of Long Term Evolution LTE ascending transmission method based on TTI binding that the embodiment of the present invention provides, comprising:
Base station is according to the channel quality of wireless channel, and bind size for the user terminal being in cell edge sets different Transmission Time Interval TTI, wherein, channel quality is better, then TTI binding size is less, and channel quality is poorer, then TTI binding size is larger; Described TTI binds the TTI number that size is carrying data block;
Described base station triggers user terminal TTI binds, and sends TTI binding configuration information to user terminal, and described TTI binds configuration information and comprises set TTI binding size information;
User terminal binds configuration information according to described TTI, sends Physical Uplink Shared Channel PUSCH data message.
Preferably, also comprise:
Size is bound according to configured TTI in base station, setting hybrid automatic repeat-request HARQ two-way time RTT size, and wherein, TTI binding size is larger, and HARQ RTT is larger, and TTI binding size is less, and HARQ RTT is less; Or
Base station sets HARQ RTT is fixed numbers;
Described TTI binds in configuration information, also comprises the HARQ RTT size information of setting.
Preferably, also comprise:
Base station, according to the sensitivity of business to time delay, is user terminal setting continuous subframes or the TTI binding mode of discontinuous subframe, wherein, for delay sensitive business, adopt the TTI binding of continuous subframes, for the insensitive business of time delay, adopt the TTI of discontinuous subframe to bind;
The TTI binding mode of described continuous subframes comprises: one is bundled in transmission on multiple continuous print TTI;
The TTI binding mode of described discontinuous subframe comprises: one is bundled in transmission on multiple discontinuous TTI;
Described TTI binds in configuration information and also comprises set TTI binding mode information.
Preferably, wherein, when the TTI binding mode set for user terminal is the TTI binding of discontinuous subframe, described method also comprises:
Base station is the positional information of user terminal setting binding TTI;
Described TTI binds in configuration information the positional information also comprising set TTI binding.
Preferably, wherein, base station sends TTI to user terminal and binds configuration information, specifically comprises:
Base station sends TTI by RRC signaling to user terminal and binds configuration information; And/or
Send TTI by layer 1 control signal to user terminal in real time and bind configuration information.
Preferably, also comprise:
The channel quality of the wireless channel of identification of base stations user terminal position;
When being in the middle part of community according to described channel quality identification place user terminal, for user terminal setting does not adopt TTI to bind.
A kind of LTE base station that the embodiment of the present invention provides, comprising:
TTI binds size setup unit, for the channel quality according to wireless channel, binds size for the user terminal being in cell edge sets different TTI, wherein, channel quality is better, then TTI binding size is less, channel quality is poorer, then TTI binding size is larger; Described TTI binds the TTI number that size is carrying data block;
Dispensing unit, binds for activated user terminal TTI, sends TTI bind configuration information to user terminal, to bind configuration information by user terminal according to described TTI, send PUSCH data message, wherein, described TTI binds configuration information and comprises set TTI binding size information.
Preferably, also comprise:
HARQ RTT size setup unit, for binding size according to configured TTI, setting HARQ RTT size, wherein, TTI binding size is larger, and HARQ RTT is larger, and TTI binding size is less, and HARQ RTT is less; Or setting HARQ RTT is fixed numbers;
Described TTI binds in configuration information, also comprises the HARQ RTT size information of setting.
Preferably, also comprise:
TTI binding mode setup unit, for according to the sensitivity of business to time delay, for user terminal sets the TTI binding mode of continuous subframes or discontinuous subframe, wherein, for delay sensitive business, adopt the TTI binding of continuous subframes, for the insensitive business of time delay, adopt the TTI of discontinuous subframe to bind;
The TTI binding mode of described continuous subframes comprises: one is bundled in transmission on multiple continuous print TTI;
The TTI binding mode of described discontinuous subframe comprises: one is bundled in transmission on multiple discontinuous TTI;
Described TTI binds in configuration information and also comprises set TTI binding mode information.
Preferably, when the TTI binding mode set for user terminal is the TTI binding of discontinuous subframe, described base station also comprises:
TTI bindings bit installs cell, for the positional information for user terminal setting binding TTI;
Described TTI binds in configuration information the positional information also comprising set TTI binding.
Preferably, described dispensing unit, sends TTI especially by RRC signaling to user terminal and binds configuration information; And/or
Send TTI by layer 1 control signal to user terminal in real time and bind configuration information.
Preferably, described dispensing unit, also for identifying the channel quality of the wireless channel of user terminal position; When being in the middle part of community according to described channel quality identification place user terminal, for user terminal setting does not adopt TTI to bind.
A kind of LTE system that the embodiment of the present invention provides, comprising:
According to the LTE base station provided in any one LTE base station embodiment above-mentioned; And
User terminal, for binding configuration information according to described TTI, sends PUSCH data message.
The LTE ascending transmission method based on TTI binding provided based on the above embodiment of the present invention, base station and system, by the channel quality of base station according to wireless channel, bind size for the user terminal being in cell edge sets different TTI, send PUSCH data message to make user terminal according to this TTI binding information set flexibly.Particularly, channel quality is better, then TTI binding size is less, avoids multiple TTI to bind the wasting of resources brought, thus saves Radio Resource; Channel quality is poorer, then TTI binding size is larger, thus improve correct decoding probability, reduce retransmit and reduce corresponding control signal expense, realize the channel conditions of more preferably coupling diverse location user terminal, thus enhance the covering power of cell edge Physical Uplink Shared Channel.
By referring to the detailed description of accompanying drawing to exemplary embodiment of the present invention, further feature of the present invention and advantage thereof will become clear.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Meanwhile, it should be understood that for convenience of description, the size of the various piece shown in accompanying drawing is not draw according to the proportionate relationship of reality.Represent similar terms in similar label and letter accompanying drawing below, therefore, once be defined in an a certain Xiang Yi accompanying drawing, then do not need to be further discussed it in accompanying drawing subsequently.
What form a part for specification drawings describes embodiments of the invention, and together with the description for explaining principle of the present invention.
With reference to accompanying drawing, according to detailed description below, clearly the present invention can be understood, wherein:
Fig. 1 illustrates TTI binding technology schematic diagram of the prior art;
Fig. 2 illustrates the knot flow process intention of a kind of embodiment of LTE ascending transmission method based on TTI binding provided by the present invention;
Fig. 3 illustrates the schematic flow sheet of a kind of embodiment of LTE ascending transmission method based on TTI binding provided by the present invention;
Fig. 4 illustrates the schematic flow sheet of a kind of embodiment of LTE ascending transmission method based on TTI binding provided by the present invention;
Fig. 5 illustrates the schematic diagram of discontinuous TTI binding provided by the invention;
Fig. 6 illustrates the HARQ procedure schematic diagram of the technology of TTI binding in prior art;
Fig. 7 illustrates the schematic flow sheet of a kind of embodiment of LTE ascending transmission method based on TTI binding provided by the present invention;
Fig. 8 illustrates the structural representation of a kind of embodiment of LTE base station provided by the present invention;
Fig. 9 illustrates the structural representation of a kind of embodiment of LTE system provided by the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.It should be noted that: unless specifically stated otherwise, otherwise the parts of setting forth in these embodiments and the positioned opposite of step do not limit the scope of the invention.
Illustrative to the description only actually of at least one exemplary embodiment below, never as any restriction to the present invention and application or use.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
May not discuss in detail for the known technology of person of ordinary skill in the relevant, method and apparatus, but in the appropriate case, described technology, method and apparatus should be regarded as a part of authorizing specification.
In all examples with discussing shown here, any occurrence should be construed as merely exemplary, instead of as restriction.Therefore, other example of exemplary embodiment can have different values.
Shown in Figure 2, Fig. 2 illustrates the schematic flow sheet of a kind of embodiment of LTE ascending transmission method based on TTI binding provided by the present invention.The LTE ascending transmission method based on TTI binding that this embodiment provides comprises following operation.
201, base station is evolved node B(Evolved Node B such as, eNobeB) according to the channel quality of wireless channel, bind size for the UE being in cell edge sets different TTI, wherein, channel quality is better, then TTI binding size is less, channel quality is poorer, then transmission performance needs to promote, and therefore TTI binding size is larger; TTI binds the TTI number that size is carrying data block.By 201 operations, the uplink wireless channel quality of base station by detecting, for different UE, configures different TTI to the uplink of next frame UE and binds size.
Exemplarily, channel quality is better, then setting TTI binding size is 2, bad channel quality, then setting TTI binding size is 8, marginal channel quality, then can set TTI binding size is 4.
Size, according to channel quality, is bound for the UE being in cell edge sets different TTI in base station, and when channel quality is good, UE uses less TTI binding to avoid multiple TTI to bind the wasting of resources brought, thus saves Radio Resource; On the contrary, work as bad channel quality, UE adopts larger TTI binding, improves the probability of correct decoding, reduces to retransmit, and reduce corresponding control signal expense.
Base station can set flexibly according to the enforcement of different implementations is above-mentioned, such as, according to channel quality, UE is divided into multiple grade, and the UE of different brackets configures different TTI and binds size.For channel quality, edge UE higher grade relatively preferably, configures less TTI binding; The edge UE lower grade poor especially for channel quality, configures larger TTI binding.
In 201, uplink signal-channel quality can based on the channel detection pilot frequency (SRS of LTE system, Sounding Reference Signal), Signal to Interference plus Noise Ratio (Signal to Interference plus Noise Ratio, SINR) or other uplink physical channel/signal acquisitions.
In addition, base station is for Cell Center User, and because channel quality is usually all better, TTI can not be adopted to bind, namely TTI binds size is 1.Particularly: the channel quality of the wireless channel of identification of base stations UE position; When being in the middle part of community according to channel quality identification place UE, for UE setting does not adopt TTI to bind.
202, base station triggers UETTI bindings, send TTI to UE and bind configuration information, and TTI binds configuration information and comprises set TTI binding size information.
203, UE binds configuration information according to TTI, sends PUSCH data message.After base station receives PUSCH data message, carry out corresponding demodulation, feedback processing.Such as, when adopting TTI binding, each sub-frame data of binding, after reception, last TTI data of demodulation, does and merges by base station, judges whether to need to retransmit this bag according to pooling information.If desired retransmit, feed back NACK, retransmit if do not need, feeding back ACK.
The LTE ascending transmission method based on TTI binding that the above embodiment of the present invention provides, by the channel quality of base station according to wireless channel, the channel quality status of the edge UE of coupling diverse location, thus adapted to UE channel variation, namely Radio Resource has been saved, in turn enhance the covering power of up PUSCH, play the performance of TTI binding technology more.
Simultaneously, rate business is waited for the medium/high of cell edge UE, owing to carrying more data bit, channel quality is poor, link demodulation performance cannot ensure, and existing TTI binding technology be only applicable to PRB number be not more than 3 little bandwidth, low-order-modulated is as quarternary phase-shift keying (QPSK) (Quadri-Phase Shift Keying, QPSK) low rate traffic, can not be used for the transfer of data of the speed such as medium/high.And the above-mentioned dynamic setting TTI of logical the present invention binds size, can to the PUSCH of any PRB number, arbitrarily modulation system, adopt TTI binding technology, the medium/high rate business further providing cell edge UE ensures, add the covering of the medium/high rate business of LTE system Cell Edge User, solve the up covering problem of the PUSCH channel of up carrying different rates business, particularly high speed rate business and VoIP, thus reach the object promoting the overall covering power of LTE system.
Shown in Figure 3, Fig. 3 illustrates the schematic flow sheet of a kind of embodiment of LTE ascending transmission method based on TTI binding provided by the present invention.According to a concrete example of the inventive method embodiment, the method can also comprise:
301, size is bound according to configured TTI in base station, setting HARQ two-way time (Round Trip Time, RTT) size, and wherein, TTI binding size is larger, and HARQ RTT is larger, and TTI binding size is less, and HARQ RTT is less; Such as, or setting HARQ RTT is set as fixed numbers, 16ms.Accordingly, TTI binds in size information, also comprises the HARQ RTT size information of setting.
By above-described embodiment, HARQ RTT can be determined according to concrete TTI binding size and actual needs.Change because the HARQ cycle can bind size according to TTI, make system be more suitable for actual transmissions, performance is better.Such as:
If when TTI binding size is 2, can set HARQ RTT is 8ms;
If when TTI binding size is 4 or 8, can set HARQ RTT is 16ms;
If when TTI binding size is 2,4 or 8, can set HARQ RTT is 16ms
In addition, HARQ RTT also can use fixing 16ms, does not receive this instruction when base station does not send about the instruction of HARQ RTT or UE, and namely unified is that 16ms transmits according to HARQ RTT, to reduce the complexity that system realizes.
Shown in Figure 4, Fig. 4 illustrates the schematic flow sheet of a kind of embodiment of LTE ascending transmission method based on TTI binding provided by the present invention.The method also comprises:
401, base station is according to the sensitivity of business to time delay, for UE sets the TTI binding mode of continuous subframes or discontinuous subframe, wherein, for delay sensitive business, such as, VoIP business, adopts the TTI binding of continuous subframes, for the insensitive business of time delay, such as ftp business, adopts the TTI of discontinuous subframe to bind;
The TTI binding mode of continuous subframes comprises: one is bundled in transmission on multiple continuous print TTI; A TTI being bundled in multiple Time Continuous sends, and each TTI on, transmission is with the information bit of different redundancy versions; The TTI binding mode of discontinuous subframe comprises: one is bundled in transmission on multiple discontinuous TTI; One is bundled in transmission on multiple discontinuous TTI, each TTI sends the information bit with different redundancy versions.
TTI binds in configuration information and also comprises set TTI binding mode information.
By above-described embodiment, according to the susceptibility of business to time delay, the TTI binding of configuration continuous subframes or discontinuous subframe.Shown in Figure 5, Fig. 5 illustrates the schematic diagram of discontinuous TTI binding provided by the invention.PUSCH is configured to the TTI binding of discontinuous subframe, HARQ impact in following Fig. 6 can be avoided to limit with scheduling.The HARQ RTT of discontinuous subframe TTI binding can be 8ms.In addition, compared with binding with non-TTI, the TTI binding of discontinuous subframe has reduction ACK/NACK feedback overhead, reduces the advantages such as ACK/NACK probability of miscarriage of justice
Contrastingly, in the prior art, because HARQ constant period is 16ms.Shown in Figure 6, Fig. 6 illustrates the HARQ procedure schematic diagram of the technology of TTI binding in prior art.Because existing TTI binding technology is bound together by multiple continuous print TTI.This mode changes original HARQ mechanism, and such as, in FDD system, the HARQ RTT that TTI binds business increases to 16ms, across the RTT of two non-TTI bindings; Simultaneously, because TTI binds 4ms, in order to avoid the conflict of resource, need to be limited scheduling, scheduler will do further setting, such as, subframe 8-11 can not be used for dispatching non-TTI and bind business, if otherwise scheduled non-TTI and bind business, its re-transmission will appear in subframe 16-19, and that conflicts mutually by with the re-transmission that TTI binds business; Subframe 13-16 can not be used for TTI and bind business, otherwise conflicts with the re-transmission that TTI binds business mutually equally.
Shown in Figure 7, Fig. 7 illustrates the schematic flow sheet of a kind of embodiment of LTE ascending transmission method based on TTI binding provided by the present invention.According to a concrete example of the inventive method embodiment, when the TTI binding mode set for UE is the TTI binding of discontinuous subframe, method also comprises: 701, and base station is the positional information of UE setting binding TTI.
TTI binds in configuration information the positional information also comprising set TTI binding, to indicate in similar Fig. 5, and the subframe position of the TTI binding of discontinuous subframe.
Compared to HARQ, the TTI binding of discontinuous subframe, without the need to PHICH feeding back ACK/NACK, saves PHICH expense compared to conventional transmission scheme.
In addition, the TTI of discontinuous subframe binds single signaling and triggers, and even this signaling does not trigger and then can adopt traditional HARQ retransmission scheme.The HARQ RTT of discontinuous subframe TTI binding is consistent with traditional HARQ, is 8ms.
In the various embodiments described above, bind at 202 base station triggers UE TTI, and send the operation of TTI binding configuration information to UE, specifically can realize in the following manner:
Base station sends TTI by RRC signaling to UE and binds configuration information and/or bind configuration information by layer 1 control signal to UE transmission TTI in real time.
Size may be bound with regard to TTI for different UEs in base station, the TTI position of continuously/discontinuous subframe binding mode and binding is arranged, and binds configuration information by TTI and send to UE.
TTI binds size information, subframe binding mode information and binding positional information and can bind configuration information or multiple TTI and bind configuration information and send to UE by being included in TTI.
Accordingly, can be used alone RRC signaling or layer 1(PDCCH) control signal carries out TTI binding triggering, transmission TTI binds configuration information.
Realized by RRC signaling, then according to the transmission cycle of RRC signaling, accordingly, the On/Off of TTI binding is by the semi-static configuration of rrc layer.Such as, the TTI starting to adopt TTI to bind and configure by RRC signaled UE binds size.Now, it is semi-static configuration that TTI binds size, by cycle/aperiodic configuration or reprovision, bind size to change TTI.By RRC signaling, inform continuous/discontinuous subframe binding mode that UE configures.Now, continuously/discontinuous subframe binding mode is semi-static configuration, by cycle/aperiodic configuration or reprovision, change continuously/discontinuous subframe binding mode.
Realized by layer 1 control signal, in up LTE system, considering the channel quality that the reason such as user mobility, presence of intercell interference change causes better is dynamic change.When user channel quality changes, according to the real-time change of channel quality, can realize every frame and indicate in real time, configuration or reprovision TTI bind rapidly, thus match channels change more timely and effectively.Such as, increase the bit of some at layer 1 control signal Downlink Control Information (Downlink Control Information, DCI) form 0, bind configuration information to carry TTI, and impact can not be brought on layer 1 signaling of other DCI format.As bound size or mode by layer 1 control signal configuration TTI, now, can to configure rapidly according to Real-time Channel situation or reprovision TTI binds size or mode.
Meanwhile, the TTI positional information that binding TTI number, continuously/discontinuous TTI binding pattern setting and discontinuous TTI bind can bind configuration information by different TTI, informs UE respectively by the combination of RRC signaling and layer 1 control signal simultaneously.Such as, TTI binding triggers and continuously/discontinuous TTI binding pattern sets by RRC signaled user, triggering and the continuously/discontinuous TTI binding of now TTI binding are semi-static configurations, by cycle/aperiodic configuration or reprovision, and user is informed by layer 1 control signal in the TTI position of binding TTI number and discontinuous TTI binding, now can to configure fast according to customer location and Real-time Channel environment or reprovision TTI binds the TTI number adopted, UE so not only can be made according to real time channel quality change adjustment transmission mode but also can effective key-course 1 control signal expense.
When adopting discontinuous TTI binding mode, inform by RRC signaling or layer 1 control signal the TTI position that UE binds together.
Shown in Figure 8, Fig. 8 illustrates the structural representation of a kind of embodiment of LTE base station provided by the present invention.A kind of LTE base station that this embodiment provides, comprising:
TTI binds size setup unit 801, and for the channel quality according to wireless channel, bind size for the UE being in cell edge sets different TTI, wherein, channel quality is better, then TTI binding size is less, and channel quality is poorer, then TTI binding size is larger; TTI binds the TTI number that size is carrying data block;
Dispensing unit 802, binds for triggering UE TTI, sends TTI bind configuration information to UE, to bind configuration information by UE according to TTI, sends PUSCH data message, and wherein, TTI binds configuration information and comprises set TTI binding size information.
According to a concrete example of base station embodiment of the present invention, this base station also comprises:
HARQ RTT size setup unit 803, for binding size according to configured TTI, setting HARQ RTT size, wherein, TTI binding size is larger, and HARQ RTT is larger, and TTI binding size is less, and HARQ RTT is less; Or setting HARQ RTT is set as fixed numbers, such as, 16ms.TTI binds in configuration information, also comprises the HARQ RTT size information of setting.
According to a concrete example of base station embodiment of the present invention, also comprise:
TTI binding mode setup unit 804, for according to the sensitivity of business to time delay, for UE sets the TTI binding mode of continuous subframes or discontinuous subframe, wherein, for delay sensitive business, adopt the TTI binding of continuous subframes, for the insensitive business of time delay, adopt the TTI of discontinuous subframe to bind; The TTI binding mode of continuous subframes comprises: one is bundled in transmission on multiple continuous print TTI; The TTI binding mode of discontinuous subframe comprises: one is bundled in transmission on multiple discontinuous TTI; TTI binds in configuration information and also comprises set TTI binding mode information.
According to a concrete example of base station embodiment of the present invention, when the TTI binding mode set for UE is the TTI binding of discontinuous subframe, this base station also comprises:
TTI bindings bit installs cell 805, for the positional information for UE setting binding TTI;
TTI binds in configuration information the positional information also comprising set TTI binding.
According to a concrete example of base station embodiment of the present invention, TTI binding mode setup unit 804, also for according to channel condition, for UE sets the TTI binding mode of discontinuous subframe; TTI binds in configuration information and also comprises set TTI binding mode information.
In above-described embodiment, dispensing unit 802, concrete periodicity or RRC signaling of aperiodically passing through send TTI to UE and bind configuration information; Or send TTI by layer 1 control signal to UE in real time and bind configuration information.
According to a concrete example of base station embodiment of the present invention, dispensing unit 802, also for identifying the channel quality of the wireless channel of UE position; When being in the middle part of community according to channel quality identification place UE, for UE setting does not adopt TTI to bind.
The structural representation of a kind of embodiment of LTE system provided by the present invention is shown see Fig. 9, Fig. 9.The invention provides a kind of LTE system to comprise:
Any one LTE base station 901 in above-described embodiment; And user terminal 902, for binding configuration information according to TTI, send PUSCH data message.
So far, described in detail according to a kind of LTE ascending transmission method based on TTI binding of the present invention, base station and system.In order to avoid covering design of the present invention, details more known in the field are not described.Those skilled in the art, according to description above, can understand how to implement technical scheme disclosed herein completely.
In this specification, each embodiment all adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiment, same or analogous part cross-reference between each embodiment.For the LTE uplink base station of binding based on TTI and system embodiment, because itself and embodiment of the method are substantially corresponding, so description is fairly simple, relevant part illustrates see the part of embodiment of the method.
The LTE ascending transmission method based on TTI binding of the present invention, base station and system may be realized in many ways.Such as, any combination by software, hardware, firmware or software, hardware, firmware realizes the LTE ascending transmission method based on TTI binding of the present invention, base station and system.Said sequence for the step of described method is only to be described, and the step of method of the present invention is not limited to above specifically described order, unless specifically stated otherwise.In addition, in certain embodiments, can be also record program in the recording medium by the invention process, these programs comprise the machine readable instructions for realizing according to method of the present invention.Thus, the present invention also covers the recording medium stored for performing the program according to method of the present invention.
Although be described in detail specific embodiments more of the present invention by example, it should be appreciated by those skilled in the art, above example is only to be described, instead of in order to limit the scope of the invention.It should be appreciated by those skilled in the art, can without departing from the scope and spirit of the present invention, above embodiment be modified.Scope of the present invention is limited by claims.
Claims (13)
1., based on a Long Term Evolution LTE ascending transmission method for TTI binding, comprising:
Base station is according to the channel quality of wireless channel, and bind size for the user terminal being in cell edge sets different Transmission Time Interval TTI, wherein, channel quality is better, then TTI binding size is less, and channel quality is poorer, then TTI binding size is larger; Described TTI binds the TTI number that size is carrying data block;
Described base station triggers user terminal TTI binds, and sends TTI binding configuration information to user terminal, and described TTI binds configuration information and comprises set TTI binding size information;
User terminal binds configuration information according to described TTI, sends Physical Uplink Shared Channel PUSCH data message.
2. method according to claim 1, also comprises:
Size is bound according to configured TTI in base station, setting hybrid automatic repeat-request HARQ two-way time RTT size, and wherein, TTI binding size is larger, and HARQ RTT is larger, and TTI binding size is less, and HARQ RTT is less; Or
Base station sets HARQ RTT is fixed numbers;
Described TTI binds in configuration information, also comprises the HARQ RTT size information of setting.
3. method according to claim 2, also comprises:
Base station, according to the sensitivity of business to time delay, is user terminal setting continuous subframes or the TTI binding mode of discontinuous subframe, wherein, for delay sensitive business, adopt the TTI binding of continuous subframes, for the insensitive business of time delay, adopt the TTI of discontinuous subframe to bind;
The TTI binding mode of described continuous subframes comprises: one is bundled in transmission on multiple continuous print TTI;
The TTI binding mode of described discontinuous subframe comprises: one is bundled in transmission on multiple discontinuous TTI;
Described TTI binds in configuration information and also comprises set TTI binding mode information.
4. method according to claim 3, wherein, when the TTI binding mode set for user terminal is the TTI binding of discontinuous subframe, described method also comprises:
Base station is the positional information of user terminal setting binding TTI;
Described TTI binds in configuration information the positional information also comprising set TTI binding.
5. the method according to Claims 1-4 any one, wherein, base station sends TTI to user terminal and binds configuration information, specifically comprises:
Base station sends TTI by RRC signaling to user terminal and binds configuration information; And/or
Send TTI by layer 1 control signal to user terminal in real time and bind configuration information.
6. method according to claim 5, also comprises:
The channel quality of the wireless channel of identification of base stations user terminal position;
When being in the middle part of community according to described channel quality identification place user terminal, for user terminal setting does not adopt TTI to bind.
7. a LTE base station, comprising:
TTI binds size setup unit, for the channel quality according to wireless channel, binds size for the user terminal being in cell edge sets different TTI, wherein, channel quality is better, then TTI binding size is less, channel quality is poorer, then TTI binding size is larger; Described TTI binds the TTI number that size is carrying data block;
Dispensing unit, binds for activated user terminal TTI, sends TTI bind configuration information to user terminal, to bind configuration information by user terminal according to described TTI, send PUSCH data message, wherein, described TTI binds configuration information and comprises set TTI binding size information.
8. base station according to claim 7, also comprises:
HARQ RTT size setup unit, for binding size according to configured TTI, setting HARQ RTT size, wherein, TTI binding size is larger, and HARQ RTT is larger, and TTI binding size is less, and HARQ RTT is less; Or setting HARQ RTT is fixed numbers;
Described TTI binds in configuration information, also comprises the HARQ RTT size information of setting.
9. base station according to claim 8, also comprises:
TTI binding mode setup unit, for according to the sensitivity of business to time delay, for user terminal sets the TTI binding mode of continuous subframes or discontinuous subframe, wherein, for delay sensitive business, adopt the TTI binding of continuous subframes, for the insensitive business of time delay, adopt the TTI of discontinuous subframe to bind;
The TTI binding mode of described continuous subframes comprises: one is bundled in transmission on multiple continuous print TTI;
The TTI binding mode of described discontinuous subframe comprises: one is bundled in transmission on multiple discontinuous TTI;
Described TTI binds in configuration information and also comprises set TTI binding mode information.
10. base station according to claim 9, wherein, when the TTI binding mode set for user terminal is the TTI binding of discontinuous subframe, described base station also comprises:
TTI bindings bit installs cell, for the positional information for user terminal setting binding TTI;
Described TTI binds in configuration information the positional information also comprising set TTI binding.
11. base stations according to claim 7 to 10 any one, wherein, described dispensing unit, sends TTI especially by RRC signaling to user terminal and binds configuration information; And/or
Send TTI by layer 1 control signal to user terminal in real time and bind configuration information.
12. base stations according to claim 11, described dispensing unit, also for identifying the channel quality of the wireless channel of user terminal position; When being in the middle part of community according to described channel quality identification place user terminal, for user terminal setting does not adopt TTI to bind.
13. 1 kinds of LTE system, comprising:
LTE base station described in claim 7 to 12 any one; And
User terminal, for binding configuration information according to described TTI, sends PUSCH data message.
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