CN101729221B - Multi-subframe uplink scheduling method for time division multiplexing system - Google Patents

Abstract

The invention discloses a multi-subframe uplink scheduling method of a time division multiplexing system. The method comprises the following steps that: when a grouping factor Ng of a PHICH is equal to 1, a base station reserves N PHICH groups in a downlink subframe, selects a downlink feedback mode from a multi-ACK/NACK feedback mode and a bundling-ACK/NACK feedback mode according to the number of uplink users NUE to be scheduled currently and/or the number of the uplink users using 1 or 2 uplink subframes for data transmission in the NUE uplink users, and informs each uplink user to be scheduled of the selected downlink feedback mode through an uplink scheduling authority, wherein the N rounds up a result obtained by dividing a product of the Ng and an NRB by 8 and the NRB represents the number of downlink resource blocks. Due to the adoption of the method, time frequency resource which is in the downlink subframe and is used for PHICH transmission can be saved.

Description

A kind of multi-subframe uplink scheduling method of time division multiplex system

Technical field

The present invention relates to the communications field, relate in particular to a kind of multi-subframe uplink scheduling method of time division multiplex system.

Background technology

At LTE (Long Term Evolution, Long Term Evolution) FDD/TDD (Frequency DivisionDuplex/Time Division Duplex, Frequency Division Duplexing (FDD)/time division duplex) in the system, down control channel is positioned at a front n OFDM (Orthogonal Frequency Division Multiplexing, OFDM) symbol, wherein n≤3.Down control channel is comprised of following message:

PCFICH (Physical Contro1Format Indication Channel, Physical Control Format Indicator Channel): be used for the size of notice n, represent with 2bits (bit);

PHICH (Physical HybridARQ Indicator Channel, physical mixed automatic repeat request indicating channel): be used for carrying descending ACK/NACK (the ACKnowledgement/Negative ACKnowledgement relevant with upstream data, confirm answering/no answering, hereinafter to be referred as A/N);

PDCCH (Physical Downlink Control Channel, Physical Downlink Control Channel): comprise descending scheduling mandate (DL grant) and uplink scheduling authorization (UL grant).

Dispatch the size of a required PHICH resource of sub-frame of uplink, be that the number N of PHICH group (PHICH group) is by PBCH (Physical Broadcast Channel, Physical Broadcast Channel) PHICH grouping (PHICH grouping) factor, the i.e. N of the upper 2bits that sends _gDetermine, be defined as follows:

$N=\mathrm{ceil}\left[N_g(N_{\mathrm{RB}}^{\mathrm{DL}}/8)\right]$ (formula 1)

Wherein, ceil () expression rounds up,

The quantity that represents descending RB (Resource Block, Resource Block) (is hereinafter used N _RBExpression); 1 PHICH group is comprised of 8 PHICH; N _g={ 2,1,1/2,1/6}.

Can calculate according to formula 1: under the different bandwidth, different N _gBe worth corresponding N value, as shown in table 1.

Table 1

Up-downgoing is symmetrical in the LTE FDD system, DL subframe (Downlink subframe, descending sub frame) and UL subframe (Uplink subframe, sub-frame of uplink) has one to one relation, therefore all DL subframes configure identical PHICH resource, and size is N.

And up-downgoing is asymmetric in the LTE TDD system, and concrete UL/DL (uplink/downlink) configuration has 7 kinds, and is as shown in table 2:

Table 2

Wherein:

D represents DL subframe (descending sub frame);

U represents UL subframe (sub-frame of uplink);

S represents Specific subframe (special subframe), wherein comprise DwPTS (Downlink PilotTime Slot, descending pilot frequency time slot), front 2 OFDM (Orthogonal FrequencyDivision Multiplexing, OFDM) symbol of special subframe is used for the bearing downlink control signal.

Sub-frame of uplink, descending sub frame and special subframe all are 1ms.When the number of sub-frame of uplink during more than the number sum of descending sub frame and special subframe, a plurality of sub-frame of uplink must utilize uplink scheduling authorization to dispatch in same descending sub frame, that is to say, in 1 uplink scheduling authorization of PDCCH, give UE (User Equipment, user terminal) distribute a plurality of sub-frame of uplink, this uplink scheduling mode is defined as multi-TTI (many subframes) uplink scheduling mode.The length of present multi-TTI window is 2, namely 1 descending sub frame can be dispatched at most 2 sub-frame of uplink, and in the uplink scheduling authorization that adopts PDCCH DCI format0 (Physical Downlink Control Channel Downlink Control Indication format0, the descending control indication of Physical Downlink Control Channel form 0), indicate concrete which sub-frame of uplink of having dispatched with UL index (upper line index) territory of 2bits.Wherein, all sub-frame of uplink that comprise in the multi-TTI window all use identical physical resource and transformation parameter.

In 7 kinds of UL/DL configurations of LTE TDD, only has the sub-frame of uplink number of configuration 0 more than descending sub frame and special subframe sum.Adopt configuration 0 o'clock, 1 descending sub frame and 1 special subframe not only comprise the descending scheduling mandate of this descending sub frame/special subframe, also comprise uplink scheduling authorization and the PHICH of next 3 sub-frame of uplink.In order to guarantee that the expense of PHICH minimizes among the DwPTS, DwPTS only dispatches 1 sub-frame of uplink usually, and this just means that 0 work song frame and 5 work song frames will dispatch 2 sub-frame of uplink simultaneously, and feeds back respectively an A/N for these 2 sub-frame of uplink.The number of the PHICH group that therefore comprises in 0 work song frame and the 5 work song frames is exactly 2N.

This multi-TTI uplink dispatch method that proposes for configuration 0 at present, what adopt is a plurality of ACK/NACK feedback systems (being designated hereinafter simply as the multi-A/N feedback system), 2 sub-frame of uplink namely dispatching for it in descending sub frame feed back respectively an A/N, like this will be so that be used for the running time-frequency resource of PHICH transmission in the descending sub frame and double.If UE takies 2 sub-frame of uplink simultaneously in most of situation, when eNodeB (Node B, i.e. base station) wanted the more UE of scheduling simultaneously, the method will greatly reduce the available resources of downstream grants.

Summary of the invention

Technical problem to be solved by this invention is, overcome the deficiencies in the prior art, a kind of multi-subframe uplink scheduling method of time division multiplex system is provided, be used for the employed running time-frequency resource of PHICH transmission (namely being used for sub-frame of uplink is fed back) in the descending sub frame to reduce, but or in the situation of reserving the identical running time-frequency resource that is used for the PHICH transmission, increase dispatching uplink user's quantity.

In order to address the above problem, the invention provides a kind of multi-subframe uplink scheduling method of time division multiplex system, PHICH divides group factor N when physical mixed automatic repeat request indicating channel _gEqual at 1 o'clock, N PHICH group reserved in the base station in descending sub frame, and according to current up number of users N to be scheduled _UE, and/or N _UEUse the up user's of 1 or 2 sub-frame of uplink the transmission of data number among the individual up user, in multiple acknowledgments answering/no answering multi-ACK/NACK feedback system and binding acknowledgement answering/no answering bundling-ACK/NACK feedback system, select a kind of downstream feedback mode, and selected downstream feedback mode is notified to respectively treating the dispatching uplink user by uplink scheduling authorization;

Wherein, described N equals N _gWith N _RBProduct round up again N divided by 8 _RBThe quantity of expression downlink resource piece.

In addition, if N _UELess than or equal to 4N, the selected multi-ACK/NACK feedback system in base station or bundling-ACK/NACK feedback system;

If N _UEGreater than 4N, and N _UEThe up user's of 1 sub-frame of uplink the transmission of data of use number x is more than or equal to 2N among the individual up user _UESubtract 8N or N _UEUse the up user's of 2 sub-frame of uplink the transmission of datas number N among the individual up user _UESubtract x and subtract N less than or equal to 8N _UE, then multi-ACK/NACK feedback system or bundling-ACK/NACK feedback system are selected in the base station;

If N _UEGreater than 4N, and N _UEThe up user's of 1 sub-frame of uplink the transmission of data of use number x is less than 2N among the individual up user _UESubtract 8N or N _UEUse the up user's of 2 sub-frame of uplink the transmission of datas number N among the individual up user _UESubtract x and subtract N greater than 8N _UE, then the bundling-ACK/NACK feedback system is selected in the base station;

Wherein, N _UELess than or equal to: 36 times N _RBDeducting 12 times N deducts 16 values that obtain again round resulting value downwards again after 36.

In addition, the base station uses 4 different values of the upper line index of 2 bits in the uplink scheduling authorization to represent respectively: only dispatch the 1st sub-frame of uplink, only dispatch the 2nd sub-frame of uplink, the 1st and the 2nd sub-frame of uplink of scheduling and adopt multi-ACK/NACK feedback system, the 1st and the 2nd sub-frame of uplink of scheduling and adopt the bundling-ACK/NACK feedback system.

The present invention also provides a kind of multi-subframe uplink scheduling method of time division multiplex system, works as N _gEqual 1/2 or at 1/6 o'clock, 2N PHICH group reserved in the base station in descending sub frame, and according to current up number of users N to be scheduled _UE, and/or N _UEUse the up user's of 1 or 2 sub-frame of uplink the transmission of data number among the individual up user, in multi-ACK/NACK feedback system and bundling-ACK/NACK feedback system, select a kind of downstream feedback mode, and selected downstream feedback mode is notified to respectively treating the dispatching uplink user by uplink scheduling authorization;

Wherein, described N equals N _gWith N _RBProduct round up again N divided by 8 _RBThe quantity of expression downlink resource piece.

In addition, work as N _gEqual at 1/2 o'clock:

If N _UELess than or equal to 8N, the selected multi-ACK/NACK feedback system in base station or bundling-ACK/NACK feedback system;

If N _UEGreater than 8N, and N _UEThe up user's of 1 sub-frame of uplink the transmission of data of use number x is more than or equal to 2N among the individual up user _UESubtract 16N or N _UEUse the up user's of 2 sub-frame of uplink the transmission of datas number N among the individual up user _UESubtract x and subtract N less than or equal to 16N _UE, then multi-ACK/NACK feedback system or bundling-ACK/NACK feedback system are selected in the base station;

If N _UEGreater than 8N, and N _UEThe up user's of 1 sub-frame of uplink the transmission of data of use number x is less than 2N among the individual up user _UESubtract 16N or N _UEUse the up user's of 2 sub-frame of uplink the transmission of datas number N among the individual up user _UESubtract x and subtract N greater than 16N _UE, then the bundling-ACK/NACK feedback system is selected in the base station;

Wherein, N _UELess than or equal to: 36 times N _RBDeducting 24 times N deducts 16 values that obtain again round resulting value downwards again after 36.

In addition, work as N _gEqual at 1/6 o'clock:

If N _UELess than or equal to 8N, the selected multi-ACK/NACK feedback system in base station or bundling-ACK/NACK feedback system;

If N _UEGreater than 8N, and N _UEThe up user's of 1 sub-frame of uplink the transmission of data of use number x is more than or equal to 2N among the individual up user _UESubtract 16N or N _UEUse the up user's of 2 sub-frame of uplink the transmission of datas number N among the individual up user _UESubtract x and subtract N less than or equal to 16N _UE, then multi-ACK/NACK feedback system or bundling-ACK/NACK feedback system are selected in the base station;

If N _UEGreater than 8N, and N _UEThe up user's of 1 sub-frame of uplink the transmission of data of use number x is less than 2N among the individual up user _UESubtract 16N or N _UEUse the up user's of 2 sub-frame of uplink the transmission of datas number N among the individual up user _UESubtract x and subtract N greater than 16N _UE, then the bundling-ACK/NACK feedback system is selected in the base station;

Wherein, N _UELess than or equal to 16N.

In addition, the base station uses 4 different values of the upper line index of 2 bits in the uplink scheduling authorization to represent respectively: only dispatch the 1st sub-frame of uplink, only dispatch the 2nd sub-frame of uplink, the 1st and the 2nd sub-frame of uplink of scheduling and adopt multi-ACK/NACK feedback system, the 1st and the 2nd sub-frame of uplink of scheduling and adopt the bundling-ACK/NACK feedback system.

The present invention also provides a kind of multi-subframe uplink scheduling method of time division multiplex system, works as N _gEqual at 2 o'clock, N physical mixed automatic repeat request indicating channel PHICH group reserved in the base station in descending sub frame;

Wherein, described N equals N _gWith N _RBProduct round up again N divided by 8 _RBThe quantity of expression downlink resource piece.

In addition, when the base station receives the dispatch request of up user's transmission, in multi-ACK/NACK feedback system and bundling-ACK/NACK feedback system, select a kind of downstream feedback mode, and selected downstream feedback mode is notified to respectively treating the dispatching uplink user by uplink scheduling authorization.

In addition, the base station uses 4 different values of the upper line index of 2 bits in the uplink scheduling authorization to represent respectively: only dispatch the 1st sub-frame of uplink, only dispatch the 2nd sub-frame of uplink, the 1st and the 2nd sub-frame of uplink of scheduling and adopt multi-ACK/NACK feedback system, the 1st and the 2nd sub-frame of uplink of scheduling and adopt the bundling-ACK/NACK feedback system.

In sum, the said method that the present invention proposes compared with prior art, save the running time-frequency resource that is used for the PHICH transmission in the descending sub frame, perhaps in the situation of reserving the identical running time-frequency resource that is used for the PHICH transmission, but improved dispatching uplink user's quantity.

Description of drawings

Fig. 1 is the multi-subframe uplink scheduling method flow chart of embodiment of the invention time division multiplex system;

Fig. 2 is definite method schematic diagram of multi-TII uplink scheduling window.

Embodiment

Basic ideas of the present invention are: eNodeB is according to N _gUp user's number N of value, descending sub frame actual schedule _UEAnd the concrete transmission feature of up user (for example, the sub-frame of uplink number of up CU), in descending sub frame, need to determine the PHICH number of resources reserved, in descending bundling-A/N feedback (binding ACK/NACK feedback) mode and descending multi-A/N feedback system, select a kind of ACK/NACK feedback system, and selected ACK/NACK feedback system notified to UE, to reduce the running time-frequency resource that is used for the PHICH transmission in the descending sub frame or to increase schedulable up number of users.

The multi-A/N feedback system refers to: descending sub frame carries out respectively A/N feedback (namely feeding back 2 A/N) for its 2 sub-frame of uplink dispatching simultaneously; The bundling-A/N feedback system refers to: descending sub frame only is its A/N of 2 sub-frame of uplink feedbacks that dispatches simultaneously.

Describe the present invention below in conjunction with drawings and Examples.

Fig. 1 is the multi-subframe uplink scheduling method flow chart of embodiment of the invention time division multiplex system, specifically may further comprise the steps:

101:UE sends dispatch request to eNodeB.

After 102:eNodeB receives dispatch request, according to the N that obtains from PBCH _gThe number of the PHICH group that should reserve in the definite a certain descending sub frame of value, and the transmission feature concrete according to all up users that are scheduled in this descending sub frame (each the up user who namely is scheduled in this descending sub frame is at 1 sub-frame of uplink transmitting data, or at 2 continuous sub-frame of uplink transmitting datas) the descending A/N feedback system of selection.

The below is respectively to N _gReservation number and the corresponding descending A/N feedback system of the corresponding PHICH of 4 kinds of different values (2,1,1/2,1/6) group be described in detail.

(a)N _g＝2：

Work as N _g=2 o'clock, if adopt the multi-A/N feedback system according to prior art, and in descending sub frame, reserve 2N PHICH group, the number of then organizing according to the PHICH that reserves as can be known, descending sub frame can be dispatched at most (2N * 8) individual up user.

But, by calculating as can be known, organize in descending sub frame actual schedulable maximum up number of users N in the situation that reserve 2N PHICH according to available control channel resource _MaxBe (not considering the resource that pilot tone is shared):

Wherein, N _RBBe the RB number under the given bandwidth, ' 12 ' is sub-carrier number, and ' 3 ' is the maximum symbol numbers that can be used for control information, so N _RBThe * 12 * 3rd, can be used for the maximum running time-frequency resource number of control channel; ' 2N * 12 ' is the running time-frequency resource of reserving for the PHICH group in the control channel; ' 16 ' is the running time-frequency resource of reserving for PCFICH in the control channel; ' 36 ' is the running time-frequency resource number (being the running time-frequency resource number that each up user need to take) that a control information unit comprises.

In the LTE system, bandwidth value 1.4MHz, 3MHz, 5MHz, 10MHz, the N that 15MHz, 20MHz are corresponding _RBValue is respectively: 6,15,25,50,75,100.

Through calculating as can be known, under above-mentioned each bandwidth, the up number of users N of actual schedulable maximum in the descending sub frame _MaxValue all is far smaller than 2N the corresponding up number of users of PHICH group number of reserving on the descending sub frame: 2N * 8.Even the N that dispatches in the descending sub frame _MaxIndividual usefulness uses continuous 2 sub-frame of uplink to carry out transfer of data per family, and only adopts the multi-A/N feedback system, at most also only needs in the descending sub frame to reserve: N _Max* 2/8 PHICH group; And under the various bandwidth of LTE system, by bringing corresponding N into _RBThe value and the N value as can be known, N _Max* 2/8 always less than N.

Therefore can draw to draw a conclusion:

Work as N _g, in descending sub frame, only need reserve N PHICH group, and eNodeB can adopt the multi-A/N feedback system at=2 o'clock.

(b)N _g＝1：

Work as N _g, if adopt the multi-A/N feedback system according to prior art, and in descending sub frame, reserve 2N PHICH group, the up number of users N of actual schedulable maximum in the descending sub frame at=1 o'clock _MaxBe (not considering the resource that pilot tone is shared):

Through calculating as can be known, under the various bandwidth of LTE system, N _MaxValue all is far smaller than 2N the PHICH that reserves in the descending sub frame and organizes corresponding up number of users: 2N * 8.Therefore, work as N _g, in descending sub frame, equally also only need to reserve N PHICH group at=1 o'clock.

If in descending sub frame, reserve N PHICH group, the up number of users of actual schedulable maximum in the descending sub frame

Then be (not considering the resource that pilot tone is shared):

Suppose that the up number of users of actual schedule is in the descending sub frame $N_{\mathrm{UE}}(N_{\mathrm{UE}}\≤N_{\max }^{\′})$ , and have x up user only to use 1 sub-frame of uplink to carry out transfer of data, (N is then arranged _UE-x) individual up user uses continuous 2 sub-frame of uplink to carry out transfer of data.If adopt the multi-A/N feedback system, only have (the N as x+ _UE-x) * 2≤N * 8, i.e. x 〉=2N _UEDuring-8N, the N that reserves in the descending sub frame PHICH group is just enough; Otherwise eNodeB just needs to adopt the bundling-A/N feedback system.

It should be noted that because x more than or equal to 0, therefore works as N _UE≤ 4N, i.e. N _UEX 〉=2N is necessarily satisfied in-4N≤0 o'clock _UE-8N.That is to say, as the up number of users N of actual schedule _UEDuring≤4N, eNodeB can adopt the multi-A/N feedback system fully.

Therefore can draw to draw a conclusion:

Work as N _g=1 o'clock, in descending sub frame, only need reserve N PHICH group, and:

When $4N<N_{\mathrm{UE}}\&le;N_{\max }^{\&prime;},$ And eNodeB has measured more than or equal to (2N _UE-when 8N) individual up user only used 1 sub-frame of uplink to carry out transfer of data, the N that reserves on the descending sub frame PHICH group resource was sufficient, so eNodeB can select to adopt the multi-A/N feedback system;

When $4N<N_{\mathrm{UE}}\&le;N_{\max }^{\&prime;},$ And eNodeB measures and only uses 1 sub-frame of uplink to carry out the up number of users of transfer of data less than (2N _UE-8N) time, eNodeB selects to adopt the bundling-A/N feedback system;

Work as N _UEDuring≤4N, eNodeB can select to adopt the multi-A/N feedback system.

(c)N _g＝1/2：

Work as N _g, if adopt the multi-A/N feedback system according to prior art, and in descending sub frame, reserve 2N PHICH group, the up number of users N of actual schedulable maximum in the descending sub frame at=1/2 o'clock _MaxBe (not considering the resource that pilot tone is shared):

Through calculating as can be known N _MaxThe 2N that reserves in value and a descending sub frame PHICH organizes corresponding up number of users (2N * 8) and is more or less the same.Therefore, need in descending sub frame, reserve 2N PHICH group.

Suppose that the up number of users of actual schedule is N in the descending sub frame _UE(N _UE≤ N _Max), and have x up user only to use 1 sub-frame of uplink to carry out transfer of data, (N is then arranged _UE-x) individual up user uses continuous 2 sub-frame of uplink to carry out transfer of data.If adopt the multi-A/N feedback system, only have (the N as x+ _UE-x) * 2≤2N * 8, i.e. x 〉=2N _UEDuring-16N, the 2N that reserves in the descending sub frame PHICH group is just enough; Otherwise eNodeB will select to adopt the bundling-A/N feedback system.

It should be noted that because x more than or equal to 0, therefore works as N _UE≤ 8N, i.e. N _UEX 〉=2N is necessarily satisfied in-8N≤0 o'clock _UE-16N.That is to say, as the up number of users N of actual schedule _UEDuring≤8N, eNodeB can adopt the multi-A/N feedback system fully.

Therefore can draw to draw a conclusion:

Work as N _g=1/2 o'clock, in descending sub frame, need to reserve 2N PHICH group, and:

As 8N＜N _UE≤ N _Max, and eNodeB has measured more than or equal to (2N _UE-when 16N) individual up user only used 1 sub-frame of uplink to carry out transfer of data, the 2N that reserves on the descending sub frame PHICH group resource was sufficient, so eNodeB can select to adopt the multi-A/N feedback system;

As 8N＜N _UE≤ N _Max, and eNodeB measures and only uses 1 sub-frame of uplink to carry out the up number of users of transfer of data less than (2N _UE-16N) time, eNodeB selects to adopt the bundling-A/N feedback system;

Work as N _UEDuring≤8N, eNodeB can select to adopt the multi-A/N feedback system.

(d)N _g＝1/6：

Work as N _g, if adopt the multi-A/N feedback system according to prior art, and in descending sub frame, reserve 2N PHICH group, the up number of users N of actual schedulable maximum in the descending sub frame at=1/6 o'clock _MaxBe (not considering the resource that pilot tone is shared):

Through calculating as can be known N _MaxIt is large that value is organized corresponding up number of users (2N * 8) than the 2N that reserves in a descending sub frame PHICH.Therefore, need in descending sub frame, reserve 2N PHICH group.Actual schedulable maximum then is 2N * 8=16N with up amount in the descending sub frame at this moment.

Suppose that the up number of users of actual schedule is N in the descending sub frame _UE(N _UE≤ 16N), and have x up user only to use 1 sub-frame of uplink to carry out transfer of data, (N is then arranged _UE-x) individual up user uses continuous 2 sub-frame of uplink to carry out transfer of data.If adopt the multi-A/N feedback system, only have (the N as x+ _UE-x) * 2≤2N * 8, i.e. x 〉=2N _UEDuring-16N, the 2N that reserves in the descending sub frame PHICH group is just enough; Otherwise eNodeB will select to adopt the bundling-A/N feedback system.

It should be noted that because x more than or equal to 0, therefore works as N _UE≤ 8N, i.e. N _UEX 〉=2N is necessarily satisfied in-8N≤0 o'clock _UE-16N.That is to say, as the up number of users N of actual schedule _UEDuring≤8N, eNodeB can adopt the multi-A/N feedback system fully.

Therefore can draw to draw a conclusion:

Work as N _g=1/6 o'clock, in descending sub frame, need to reserve 2N PHICH group, and:

As 8N＜N _UE≤ 16N, and eNodeB has measured more than or equal to (2N _UE-when 16N) individual up user only used 1 sub-frame of uplink to carry out transfer of data, the 2N that reserves on the descending sub frame PHICH group resource was sufficient, so eNodeB can select to adopt the multi-A/N feedback system;

As 8N＜N _UE≤ 16N, and eNodeB measures and only uses 1 sub-frame of uplink to carry out the up number of users of transfer of data less than (2N _UE-16N) time, eNodeB selects to adopt the bundling-A/N feedback system;

Work as N _UEDuring≤8N, eNodeB can select to adopt the multi-A/N feedback system.

Note, in above four kinds of situations, if adopt the bundling-A/N feedback system, the corresponding PHICH call number of two sub-frame of uplink that is scheduled is simultaneously determined by the PHICH call number of the 1st sub-frame of uplink in the scheduling window or the 2nd sub-frame of uplink.

Table 3 is to above-mentioned four N _hThe reservation number and the corresponding descending A/N feedback system that are worth corresponding PHICH group are summarized.

Table 3

103:eNodeB notifies to each UE by the descending A/N feedback system that adopts PDCCH DCI format0 transmission uplink scheduling authorization (UL grant) to select m subframe.

Indicate concrete descending A/N feedback system of having dispatched which sub-frame of uplink and current selected in the UL index territory of eNodeB employing PDCCH DCI format0 2bits in uplink scheduling authorization.

Wherein, determine that the concrete grammar of multi-TTI uplink scheduling window is: descending sub frame and DwPTS dispatch respectively 1 or 2 sub-frame of uplink after 3 subframes, specifically as shown in Figure 2.For example, for No. 0 descending sub frame, first schedulable sub-frame of uplink is 4 work song frames; For 1 work song frame, first schedulable sub-frame of uplink is 7 work song frames.

The concrete meaning in UL index territory is as shown in table 4: if descending sub frame or DwPTS have only dispatched a sub-frame of uplink, i.e. and scheduling (a) or scheduling (b), then the value in UL index territory is ' 00 ' or ' 01 '; If descending sub frame or DwPTS have dispatched two sub-frame of uplink simultaneously, namely dispatched simultaneously (a) and (b), then the value in ULindex territory is ' 10 ' or ' 11 ', and the multi-A/N feedback system is adopted in ' 10 ' expression, and the bundling-A/N feedback system is adopted in ' 11 ' expression.

Table 4

The data that 104:UE decodes to PDCCH and is ready to send, through k (k 〉=3) individual subframe the time delay, at the PUSCH the transmission of data.

105:eNodeB decodes to PUSCH and produces A/N, through the individual subframe of j (j 〉=3) the time delay, send A/N by PHICH to UE.

According to descending A/N feedback system specified among the UL index in the uplink scheduling authorization, eNodeB is in same descending sub frame, may feed back the A/N of 1 sub-frame of uplink, also may feed back the A/N of 2 sub-frame of uplink, specifically be decided by the descending A/N feedback system that draws in the step 202.

106:UE decodes to PDCCH and PHICH, through k (k 〉=3) individual subframe the time delay, be ACK or NACK according to what receive, needing to determine whether retransmitting, just jump to step 104 if need to retransmit; Otherwise finish.

Claims (6)

1. the multi-subframe uplink scheduling method of a time division multiplex system is characterized in that,

PHICH divides group factor N when physical mixed automatic repeat request indicating channel _gEqual at 1 o'clock, N PHICH group reserved in the base station in descending sub frame, and according to current up number of users N to be scheduled _UE, and/or N _UEUse the up user's of 1 or 2 sub-frame of uplink the transmission of data number among the individual up user, in multiple acknowledgments answering/no answering multi-ACK/NACK feedback system and binding acknowledgement answering/no answering bundling-ACK/NACK feedback system, select a kind of downstream feedback mode, and selected downstream feedback mode is notified to respectively treating the dispatching uplink user by uplink scheduling authorization;

Wherein, described N equals N _gWith N _RBProduct round up again N divided by 8 _RBThe quantity of expression downlink resource piece;

If N _UELess than or equal to 4N, the selected multi-ACK/NACK feedback system in base station or bundling-ACK/NACK feedback system;

If N _UEGreater than 4N, and N _UEThe up user's of 1 sub-frame of uplink the transmission of data of use number x is more than or equal to 2N among the individual up user _UESubtract 8N or N _UEUse the up user's of 2 sub-frame of uplink the transmission of datas number N among the individual up user _UESubtract x and subtract N less than or equal to 8N _UE, then multi-ACK/NACK feedback system or bundling-ACK/NACK feedback system are selected in the base station;

If N _UEGreater than 4N, and N _UEThe up user's of 1 sub-frame of uplink the transmission of data of use number x is less than 2N among the individual up user _UESubtract 8N or N _UEUse the up user's of 2 sub-frame of uplink the transmission of datas number N among the individual up user _UESubtract x and subtract N greater than 8N _UE, then the bundling-ACK/NACK feedback system is selected in the base station;

Wherein, N _UELess than or equal to: 36 times N _RBDeducting 12 times N deducts 16 values that obtain again round resulting value downwards again after 36.

2. the method for claim 1 is characterized in that,

The base station uses 4 different values of the upper line index of 2 bits in the uplink scheduling authorization to represent respectively: only dispatch the 1st sub-frame of uplink, only dispatch the 2nd sub-frame of uplink, the 1st and the 2nd sub-frame of uplink of scheduling and adopt multi-ACK/NACK feedback system, the 1st and the 2nd sub-frame of uplink of scheduling and adopt the bundling-ACK/NACK feedback system.

3. the multi-subframe uplink scheduling method of a time division multiplex system is characterized in that,

Work as N _gEqual 1/2 or at 1/6 o'clock, 2N PHICH group reserved in the base station in descending sub frame, and according to current up number of users N to be scheduled _UE, and/or N _UEUse the up user's of 1 or 2 sub-frame of uplink the transmission of data number among the individual up user, in multi-ACK/NACK feedback system and bundling-ACK/NACK feedback system, select a kind of downstream feedback mode, and selected downstream feedback mode is notified to respectively treating the dispatching uplink user by uplink scheduling authorization;

Wherein, described N equals N _gWith N _RBProduct round up again N divided by 8 _RBThe quantity of expression downlink resource piece;

Work as N _gEqual at 1/2 o'clock:

If N _UELess than or equal to 8N, the selected multi-ACK/NACK feedback system in base station or bundling-ACK/NACK feedback system;

If N _UEGreater than 8N, and N _UEThe up user's of 1 sub-frame of uplink the transmission of data of use number x is more than or equal to 2N among the individual up user _UESubtract 16N or N _UEUse the up user's of 2 sub-frame of uplink the transmission of datas number N among the individual up user _UESubtract x and subtract N less than or equal to 16N _UE, then multi-ACK/NACK feedback system or bundling-ACK/NACK feedback system are selected in the base station;

If N _UEGreater than 8N, and N _UEThe up user's of 1 sub-frame of uplink the transmission of data of use number x is less than 2N among the individual up user _UESubtract 16N or N _UEUse the up user's of 2 sub-frame of uplink the transmission of datas number N among the individual up user _UESubtract x and subtract N greater than 16N _UE, then the bundling-ACK/NACK feedback system is selected in the base station;

Wherein, N _UELess than or equal to: 36 times N _RBDeducting 24 times N deducts 16 values that obtain again round resulting value downwards again after 36; Work as N _gEqual at 1/6 o'clock:

If N _UELess than or equal to 8N, the selected multi-ACK/NACK feedback system in base station or bundling-ACK/NACK feedback system;

If N _UEGreater than 8N, and N _UEThe up user's of 1 sub-frame of uplink the transmission of data of use number x is more than or equal to 2N among the individual up user _UESubtract 16N or N _UEUse the up user's of 2 sub-frame of uplink the transmission of datas number N among the individual up user _UESubtract x and subtract N less than or equal to 16N _UE, then multi-ACK/NACK feedback system or bundling-ACK/NACK feedback system are selected in the base station;

If N _UEGreater than 8N, and N _UEThe up user's of 1 sub-frame of uplink the transmission of data of use number x is less than 2N among the individual up user _UESubtract 16N or N _UEUse the up user's of 2 sub-frame of uplink the transmission of datas number N among the individual up user _UESubtract x and subtract N greater than 16N _UE, then the bundling-ACK/NACK feedback system is selected in the base station;

Wherein, N _UELess than or equal to 16N.

4. method as claimed in claim 3 is characterized in that,

The base station uses 4 different values of the upper line index of 2 bits in the uplink scheduling authorization to represent respectively: only dispatch the 1st sub-frame of uplink, only dispatch the 2nd sub-frame of uplink, the 1st and the 2nd sub-frame of uplink of scheduling and adopt multi-ACK/NACK feedback system, the 1st and the 2nd sub-frame of uplink of scheduling and adopt the bundling-ACK/NACK feedback system.

5. the multi-subframe uplink scheduling method of a time division multiplex system is characterized in that,

Work as N _gEqual at 2 o'clock, N physical mixed automatic repeat request indicating channel PHICH group reserved in the base station in descending sub frame, when the base station receives the dispatch request of up user's transmission, in multi-ACK/NACK feedback system and bundling-ACK/NACK feedback system, select a kind of downstream feedback mode, and selected downstream feedback mode is notified to respectively treating the dispatching uplink user by uplink scheduling authorization;

Wherein, described N equals N _gWith N _RBProduct round up again N divided by 8 _RBThe quantity of expression downlink resource piece.

6. method as claimed in claim 5 is characterized in that,

The base station uses 4 different values of the upper line index of 2 bits in the uplink scheduling authorization to represent respectively: only dispatch the 1st sub-frame of uplink, only dispatch the 2nd sub-frame of uplink, the 1st and the 2nd sub-frame of uplink of scheduling and adopt multi-ACK/NACK feedback system, the 1st and the 2nd sub-frame of uplink of scheduling and adopt the bundling-ACK/NACK feedback system.

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