CN103634918B - The resource allocation methods of TTI bundling in LTE system - Google Patents

Abstract

The resource allocation methods of TTI bundling in a kind of LTE system, including step 1, in cell configuration or reconfigure, obtains bandwidth of cell and the relevant configuration information of PUCCH and PRACH；Step 2, calculates the physical resource position of PUCCH and PRACH according to configuration information；Step 3, determines, according to bandwidth of cell, the maximum RB number that MSG3 can take；Step 4, calculates the resource range of distribution of MSG3 and TTI Bundling user in scheduling process；Step 5, carries out the RB distribution of MSG3 and TTI Bundling user in scheduling according to the result in step 4.Ascending physical signal resource is divided from frequency band to be come by limiting respective resource range of distribution by the present invention, thus the resource allocation conflict caused because of the Time Inconsistency each accounted for when solving resource distribution, simplify the resource allocation process in scheduling process simultaneously.

Description

The resource allocation methods of TTI bundling in LTE system

Technical field

The present invention relates to moving communicating field, be used for ensureing LTE(Long Term Evolution, Long Term Evolution particularly to one System) TTI bundling(sub-frame of uplink binding in system) physical source distributing method.

Background technology

In LTE system, when user is in cell edge, because bad channel quality, the uplink transmission power of user is limited to Limit so that the upstream rate of the user of cell edge is the lowest.In order to solve this problem, LTE system takes a kind of up son The mode of frame binding TTI Bundling is come to continuous 4 the TTI(Transmission Time Interval of edge customer, during transmission Between be spaced, in LTE system, a TTI is 1 millisecond) distribute identical physical resource, allow this user continuous print 4 TTI sends with a upstream data with different redundancy versions (version is respectively 0,2,3,1), and base station is at this number of demodulation simultaneously According to time use the merging decoding of different redundancy versions to obtain gain, thus be greatly improved the correctness of upstream data demodulation, and then Improve the handling capacity of edge customer.

In LTE system, physical resource is used RB(Resource Block, Resource Block) mode organize, RB's Numbering also would indicate that concrete physical resource position.Different physical channels is also based on what RB divided, and a RB exists It is 15KHz on frequency domain, the time is a TTI.The channel taking ascending physical signal resource has PUCCH(Physical Uplink Control Channel, Physical Uplink Control Channel) and PRACH(Physical Random Access Channel, physics with Machine accesses channel) and PUSCH(Physical Uplink Shared Channel, physical uplink link shared channels).Wherein PUCCH and PUSCH is constantly present in time domain, and the TTI that PRACH channel takies in time domain is according to high-rise configuration, Simultaneously on frequency domain, part RB at PUCCH channel occupancy frequency band two ends, it takies RB quantity according to high-rise configuration, PRACH Fix and take 6 RB, but the initial RB of the particular location taken is configured by high level by high level configuration；Remaining RB by PUSCH takies.In uplink scheduling, it is assumed that current time is N, scheduling needs the up RB distributing the N+4 moment to common User, the up RB in distribution N+6 moment is to the MSG3(message 3 in random access procedure), also need to distribute N+4 simultaneously To the identical RB of continuous 4 TTI of N+7 to the user of TTI Bundling.The most how to ensure the use of TTI Bundling Not conflicting with the resource of PRACH channel and MSG3 when distributing the RB of N+4 to N+7 in family just becomes what needs solved Problem.

Summary of the invention

It is an object of the invention to overcome the shortcoming of prior art, it is provided that the resource distribution of TTI bundling in a kind of LTE system Method, it is ensured that the resource distribution of TTI Bundling user does not conflicts with other resource request in LTE uplink scheduling, and will In scheduling, the possible resource contention of 4 TTI of N+4 to N+7 solves to be normalized to the N+4 moment.

Technical scheme provides the resource allocation methods of TTI bundling in a kind of LTE system, comprises the steps of

Step 1, in cell configuration or reconfigure, obtains bandwidth of cell and the relevant configuration information of PUCCH and PRACH；

Step 2, calculates the physical resource position of PUCCH and PRACH according to configuration information；

Step 3, determines, according to bandwidth of cell, the maximum RB number that MSG3 can take；

Step 4, physical resource position and step 3 gained MSG3 according to step 2 gained PUCCH and PRACH can account for Maximum RB number, calculate the resource range of distribution of MSG3 and TTI Bundling user in scheduling process；

Step 5, carries out the RB distribution of MSG3 and TTI Bundling user in scheduling according to the result in step 4.

And, the relevant configuration information of step 1 gained PUCCH and PRACH, the RB quantity taken including PUCCHThe initial RB position n of PRACH channel_prach。

And, in step 2,

The physical resource position mode calculating PUCCH is to be calculated as the coboundary RB of PUCCH occupied bandwidth low band portion PositionCalculate the lower boundary RB position of PUCCH occupied bandwidth highband partRB that PUCCH takies numbered wherein from 0 toWithArrive

The physical resource position mode calculating PRACH is, according to the initial RB n of PRACH channel_prachContinuous with taking RB quantityThe RB that PRACH takies is numbered wherein from n_prachArrive

And, in step 3, the maximum RB number that MSG3 can take MSG3_NUM is the quantity of the MSG3 that a TTI at most processes, and MSG3_RB is the RB that a MSG3 needs to take Quantity, MSG3_RB presets according to bandwidth of cell.

And, in step 4, the resource range of distribution calculation of MSG3 and TTI Bundling user is as follows,

First, calculate PUSCH channel according to the configuration of PRACH and be divided into 2 continuous print frequency band sizes by PRACH,

$N_{\mathrm{RB}}^{\mathrm{hole}1}=n_{\mathrm{prach}}-n_{\mathrm{part}1}^{\mathrm{pucch}}$

$N_{\mathrm{RB}}^{\mathrm{hole}2}=n_{\mathrm{part}2}^{\mathrm{pucch}}-n_{\mathrm{prach}}-N_{\mathrm{RB}}^{\mathrm{PRACH}}$

Wherein,WithRepresent that these 2 sequential frequency bands are able in Resource Block hole1, the hole2 used respectively The quantity of RB；

Then, calculate the range of distribution of MSG3 and TTI Bundling in the following manner,

If the RB quantity of the Resource Block hole1 that first sequential frequency band can use is less than 6, i.e.So:

$n_{\mathrm{msg}3}=n_{\mathrm{prach}}+N_{\mathrm{RB}}^{\mathrm{PRACH}}$

$N_{\mathrm{RB}}^{\mathrm{MSG}3}=\mathrm{MSG}3\_\mathrm{RB}\×\mathrm{MSG}3\_\mathrm{NUM}$

$n_{\mathrm{bundling}}=n_{\mathrm{msg}3}+N_{\mathrm{RB}}^{\mathrm{MSG}3}$

$N_{\mathrm{RB}}^{\mathrm{BUND}}=N_{\mathrm{RB}}^{\mathrm{hole}2}-N_{\mathrm{RB}}^{\mathrm{MSG}3}$

If the RB quantity of the Resource Block hole2 that second sequential frequency band can use is less than 6, i.e.So:

$n_{\mathrm{msg}3}=n_{\mathrm{part}1}^{\mathrm{pucch}}$

$N_{\mathrm{RB}}^{\mathrm{MSG}3}=\mathrm{MSG}3\_\mathrm{RB}\×\mathrm{MSG}3\_\mathrm{NUM}$

$n_{\mathrm{bundling}}=n_{\mathrm{msg}3}+N_{\mathrm{RB}}^{\mathrm{MSG}3}$

$N_{\mathrm{RB}}^{\mathrm{BUND}}=N_{\mathrm{RB}}^{\mathrm{hole}1}-N_{\mathrm{RB}}^{\mathrm{MSG}3}$

When above 2 conditions are the most ungratified time,

If the RB quantity of the Resource Block hole1 that first sequential frequency band can use is less than or equal to second sequential frequency band During the quantity of the RB of the Resource Block hole2 that can use,

$n_{\mathrm{msg}3}=n_{\mathrm{part}1}^{\mathrm{pucch}}$

$N_{\mathrm{RB}}^{\mathrm{MSG}3}=N_{\mathrm{RB}}^{\mathrm{hole}1}$

$n_{\mathrm{bundling}}=n_{\mathrm{prach}}+N_{\mathrm{RB}}^{\mathrm{PRACH}}$

$N_{\mathrm{RB}}^{\mathrm{BUND}}=N_{\mathrm{RB}}^{\mathrm{hole}2}$

Otherwise,

$n_{\mathrm{msg}3}=n_{\mathrm{prach}}+N_{\mathrm{RB}}^{\mathrm{PRACH}}$

$N_{\mathrm{RB}}^{\mathrm{MSG}3}=N_{\mathrm{RB}}^{\mathrm{hole}2}$

$n_{\mathrm{bundling}}=n_{\mathrm{part}1}^{\mathrm{pucch}}$

$N_{\mathrm{RB}}^{\mathrm{BUND}}=N_{\mathrm{RB}}^{\mathrm{hole}1}$

Wherein, n_msg3Represent the initial RB numbering of MSG3 distribution,Represent the length that MSG3 can distribute；n_bundling Represent the initial RB numbering of TTI Bundling distribution,Represent the length that TTI Bundling can distribute.

And, in step 5, it is included in each TTI and performs following sub-step,

Step 1051, initializes the relevant information of uplink scheduling；

Step 1052, process had distributed the scheduling of the TTI Bundling user of resource at current TTI, including first determining whether The resource requirement mark of TTI Bundling user,

Resource requirement is masked as very, then deduct, according to the RB position of distribution for the first time, the RB resource information being currently able in advance, Then judge that first time of current TTI and this TTI Bundling user is assigned to difference bundling_diff between the TTI of resource, If bundling_diff is more than or equal to 4, if resource requirement is masked as vacation；

If bundling_diff is less than 4, then the RB resource location distributed according to first TTI of this TTI Bundling user is it Distribute the RB resource of current TTI；

Resource requirement is masked as vacation, then the next TTI Bundling user having distributed resource at current TTI of poll, directly Inquire about complete to all associated users, enter step 1053；

Step 1053, processes the scheduling of resource of MSG3, including judging the n that determines in step 4_msg3WithThe money limited Whether source also has can RB resource, be then to distribute RB resource subsequently into step 1053 for MSG3, the most directly enter Enter step 1054；

Step 1054, the scheduling of processes user data, including TTI Bundling user and the data of non-TTI Bundling user Scheduling, for the data dispatch of TTI Bundling user, it is first determined whether meet following 2 conditions,

When condition 1 is current scheduling, die sinking 4 is equal to 0, and expression is continuous 4 TTI same asset of TTI Bundling user The first time resource distribution of demand；

Condition 2 is the n determined in step 4_bundlingWithThe resource limited also has the RB resource of energy,

If meet the two condition simultaneously, carry out resource distribution, after being allocated successfully, this user is used for the money of TTI Bundling Demand mark position, source is true, enters step 1055；

Otherwise it is directly entered step 1055；

Step 1055, encapsulated layer interface message；

Step 1056, current TTI finishing scheduling.

By above technical scheme, the resource allocation process in scheduling process just has only to according to the frequency band range that each can use Distribute RB resource, need not consider because the inconsistent RB resource being currently needed for caused of time is by upper one or several Individual scheduling instance distributes to other resources requesting party.Contrast prior art, the beneficial features of the present invention is as follows:

1), this is used for the resource allocation methods of TTI Bundling, it is ensured that in LTE system, uplink scheduling is TTI Bundling User's distribution has only to consider whether the resource in N+4 moment can be used, if there being available resource, then it arrives at N+5 The resource in N+7 moment the most necessarily can use, such that it is able to the resource allocation flow simplified in scheduling.

2), this be used for the resource allocation methods of TTI Bundling, calculating MSG3 and the TTI Bundling user's taked Range of distribution mode complexity is extremely low, and can adapt to high level various configurations, the method add to scheduling and system time Performance impact between can be ignored.

3), this be used for the resource allocation methods of TTI Bundling, can be according to reality in the RB quantity taken for MSG3 Border needs to configure its relevant parameter, it is possible to determines respective range of distribution according to demand, has practical value.

Accompanying drawing explanation

Fig. 1 is the overview flow chart of the embodiment of the present invention；

Fig. 2 be the embodiment of the present invention uplink scheduling in about the resource allocated substreams journey figure of TTI Bundling user.

Detailed description of the invention

Ascending physical signal resource is divided from frequency band to be come by limiting respective resource range of distribution by the present invention, thus solves The resource allocation conflict caused because of the Time Inconsistency each accounted for during resource distribution.In conjunction with accompanying drawing, it is provided that the present invention is real Execute example to be described in detail below.

Software engineering can be used when being embodied as to realize the automatic operation of technical scheme.Seeing Fig. 1, the embodiment of the present invention is passed through Determine that each resources requesting party scope that takies on frequency band, to solve the resource allocation problem of TTI Bundling, comprises the steps of

Step 101, in cell configuration or reconfigure, obtains bandwidth of cell, the relevant configuration letter of PUCCH and PRACH Breath.

Embodiment obtains bandwidth of cell in cell configuration or reconfiguration courseThe RB quantity that PUCCH takies The initial RB position n of PRACH channel_prach。

Step 102, calculates the resource location that PUCCH takies, and calculates the resource location that PRACH takies；

The physical resource position of PUCCH and PRACH can be calculated according to the information in configuration.

Embodiment calculates the resource location that PUCCH takies, and calculates PUCCH channel respectively including according to formula (1) (2) The RB information at band occupancy two ends, the RB that takies numbered wherein from 0 toWithArrive

$n_{\mathrm{part}2}^{\mathrm{pucch}}=N_{\mathrm{RB}}^{\mathrm{UL}}-n_{\mathrm{part}1}^{\mathrm{pucch}}---\left(2\right)$

Wherein,For the RB position, coboundary of PUCCH occupied bandwidth low band portion,Take for PUCCH The lower boundary RB position of bandwidth highband part,

Embodiment calculates the resource location of PRACH channel occupancy, according to the initial RB n of PRACH channel_prachWith take Continuous print RB quantityObtaining, the RB i.e. taken is numbered wherein from n_prachArrive

Step 103, processes the maximum number of MSG3, determines that MSG3 can take according to bandwidth of cell in determining a TTI Maximum RB number.

Determine that the maximum of MSG3 takies the MSG3 resource request quantity and one that RB number at most can be processed by a TTI The RB number that MSG3 takies calculates, and the quantity of MSG3 that TTI at most processes is relevant with bandwidth of cell.

Embodiment determines the maximum magnitude that can distribute of MSG3, a TTI RB quantity MSG3_RB that quantity MSG3_NUM of the MSG3 at most processed and MSG3 message needs take, Wherein advise MSG3_RB=3, MSG3_NUM=1, MSG3_NUM=5 during 10/15/20MHz when 5MHz bandwidth.

Step 104, calculates MSG3 and TTI in scheduling process according to the resource information of PUCCH, PRACH and MSG3 The resource range of distribution of the user of Bundling.

The present invention is when calculating the resource range of distribution of MSG3 and TTI Bundling user, no matter PRACH channel is in the time On be configured to how many, all think that each TTI of PRACH channel takies these RB positions.The MSG3 calculated and The range of distribution of TTI Bundling user typically cannot be less than 6 RB(in less bandwidth, such as should under 5M bandwidth situation Restriction can relax for, the range of distribution of MSG3 and TTI Bundling user cannot be less than 3 RB).

The concrete calculation of embodiment is as follows:

It is first depending on the configuration of PRACH to calculate PUSCH channel by formula (3) (4) and be divided into 2 by PRACH Continuous print frequency band size；WithRepresent this 2 sequential frequency band available resource block 1(hole1 respectively), available resource block The quantity of the RB in 2(hole2).

$N_{\mathrm{RB}}^{\mathrm{hole}1}=n_{\mathrm{prach}}-n_{\mathrm{part}1}^{\mathrm{pucch}}---\left(3\right)$

$N_{\mathrm{RB}}^{\mathrm{hole}2}=n_{\mathrm{part}2}^{\mathrm{pucch}}-n_{\mathrm{prach}}-N_{\mathrm{RB}}^{\mathrm{PRACH}}---\left(4\right)$

Then calculated the range of distribution of MSG3 and TTI Bundling by following algorithm, with ensure the MSG3 that calculates and The range of distribution of TTI Bundling user cannot be less than 6 RB.Wherein n_msg3Represent the initial RB numbering of MSG3 distribution,Represent the assignable length of MSG3；n_bundlingRepresent the initial RB numbering of TTI Bundling distribution,Represent The assignable length of TTI Bundling；

If the RB quantity of the Resource Block hole1 that first sequential frequency band can use is less than 6, i.e.So:

$n_{\mathrm{msg}3}=n_{\mathrm{prach}}+N_{\mathrm{RB}}^{\mathrm{PRACH}}$

$N_{\mathrm{RB}}^{\mathrm{MSG}3}=\mathrm{MSG}3\_\mathrm{RB}\×\mathrm{MSG}3\_\mathrm{NUM}$

$n_{\mathrm{bundling}}=n_{\mathrm{msg}3}+N_{\mathrm{RB}}^{\mathrm{MSG}3}$

$N_{\mathrm{RB}}^{\mathrm{BUND}}=N_{\mathrm{RB}}^{\mathrm{hole}2}-N_{\mathrm{RB}}^{\mathrm{MSG}3}$

If the RB quantity of the Resource Block hole2 that second sequential frequency band can use is less than 6, i.e.So:

$n_{\mathrm{msg}3}=n_{\mathrm{prat}1}^{\mathrm{pucch}}$

$N_{\mathrm{RB}}^{\mathrm{MSG}3}=\mathrm{MSG}3\_\mathrm{RB}\×\mathrm{MSG}3\_\mathrm{NUM}$

$n_{\mathrm{bundling}}=n_{\mathrm{msg}3}+N_{\mathrm{RB}}^{\mathrm{MSG}3}$

$N_{\mathrm{RB}}^{\mathrm{BUND}}=N_{\mathrm{RB}}^{\mathrm{hole}1}-N_{\mathrm{RB}}^{\mathrm{MSG}3}$

When above 2 conditions are the most ungratified time:

If the RB quantity of the Resource Block hole1 that first sequential frequency band can use is less than or equal to second sequential frequency band During the quantity of the RB of the Resource Block hole2 that can use:

$n_{\mathrm{msg}3}=n_{\mathrm{part}1}^{\mathrm{pucch}}$

$N_{\mathrm{RB}}^{\mathrm{MSG}3}=N_{\mathrm{RB}}^{\mathrm{hole}1}$

$n_{\mathrm{bundling}}=n_{\mathrm{prach}}+N_{\mathrm{RB}}^{\mathrm{PRACH}}$

$N_{\mathrm{RB}}^{\mathrm{BUND}}=N_{\mathrm{RB}}^{\mathrm{hole}2}$

Otherwise:

$n_{\mathrm{msg}3}=n_{\mathrm{puach}}+N_{\mathrm{RB}}^{\mathrm{PRACH}}$

$N_{\mathrm{RB}}^{\mathrm{MSG}3}=N_{\mathrm{RB}}^{\mathrm{hole}2}$

$n_{\mathrm{bundling}}=n_{\mathrm{part}1}^{\mathrm{pucch}}$

$N_{\mathrm{RB}}^{\mathrm{BUND}}=N_{\mathrm{RB}}^{\mathrm{hole}1}$

Step 105, distributes RB resource according to MSG3 in the range of MSG3 in uplink scheduling, presses TTI in uplink scheduling The user that the scope of Bundling is TTI Bundling distributes RB resource, it is achieved the limit of the result in foundation 105 in scheduling The RB distribution of MSG3 and TTI Bundling user processed.

During for TTI Bundling user resource allocation, the potentially conflicting that the physical resource of 4 TTI of continuous print exists with MSG3 Problem is by dividing the solution of the range of distribution of this two class resources requesting party on frequency band；This possible resource conflict problem is Owing to each requiring what the time disunity taken caused.The each TTI of uplink scheduling is carried out once, such as Fig. 2, at up tune In degree task, what each TTI performed specifically comprises the following steps that

Step 1051: initialize the relevant information of uplink scheduling, can be found in prior art；

Step 1052: process had distributed the scheduling of the TTI Bundling user of resource at current TTI.Due to for TTI Bundling user, system is that this user distributes the resource of continuous 4 TTI at certain TTI, and TTI had distributed money herein The TTI bundling user in source refers to that system is assigned with the TTI bundling user of continuous 4 TTI resources for it.

In the method, the concrete distribution for the identical RB resource of continuous 4 TTI of TTI Bundling user realizes logical The resource deduction crossing (first TTI in i.e. 4 TTI) resource distribution for the first time and rear 3 TTI realizes, this step Process the resource deduction process of rear 3 TTI.Resource distribution for the first time is shown in step 1054, here firstly the need of its resource requirement mark Will,

This flag bit is the most then to represent that this TTI Bundling user needs to take RB resource at current TTI, can be according to for the first time The RB position of distribution deducts currently available RB resource information in advance, then judges that current TTI and this TTI Bundling uses The first time at family is assigned to difference bundling_diff of the TTI of resource, if bundling_diff is more than or equal to 4, by it Mark position is false, i.e. 4 continuous print TTI resources of this TTI Bundling user are assigned；If bundling_diff Less than 4(i.e. bundling_diff=1 or 2 or 3), then the RB distributed according to first TTI of this TTI Bundling user Resource location is its RB resource distributing current TTI；

If this flag bit is false, the next TTI Bundling user having distributed resource at current TTI of poll, press more than Mode processes equally, until all associated users inquire about complete, enters step 1053.

Step 1053: process the scheduling of resource of MSG3, when for MSG3 Resources allocation, if determine at step 104 n_msg3WithThe resource limited also has available RB resource can distribute RB for this MSG3, be otherwise directly entered step Rapid 1054, if having available RB resource and MSG3 resource to be allocated successfully, need to be taken in RB distribution information RB resource deduction, subsequently into step 1054.

Step 1054: the scheduling of processes user data, includes user and the use of non-TTI Bundling of TTI Bundling here The data dispatch at family.

The data dispatch of the user of non-TTI Bundling can use prior art.And it is TTI Bundling user in this step Resources allocation needs to meet 2 conditions, and when condition 1 is current scheduling, die sinking 4 is equal to 0, and expression is TTI Bundling user First time resource distribution (in i.e. 4 TTI first TTI distribution) of continuous 4 TTI same asset demands；Condition 2 It is the n determined at step 104_bundlingWithAlso having available RB resource in the resource limited can be this TTI Bundling user distributes RB.If the two condition can not be met simultaneously, do not carry out TTI Bundling user distribution and be directly entered Step 1055.If meet the two to require simultaneously, carry out resource distribution, after being allocated successfully, this user is used for TTI Bundling Resource requirement mark position be true, and taken in RB distribution information RB resource deduction, after completing enter step 1055。

Step 1055: encapsulated layer interface message, can be found in prior art.

Step 1056: current TTI finishing scheduling, can be found in prior art.

Above flow process mainly includes, first carries out step 101～104, determines MSG3 and TTI in processing configuration task Bundling's can range of distribution；Then step 105 is carried out, according to the range assignment resource determined in scheduler task.

For the sake of ease of implementation, it is provided that the concrete example application of embodiment: bandwidth of cellPUCCH takies RB numberOriginal position n of PRACH_prach=3, at this moment:

$n_{\mathrm{part}2}^{\mathrm{pucch}}=N_{\mathrm{RB}}^{\mathrm{UL}}-n_{\mathrm{part}1}^{\mathrm{pucch}}=47$

Work as bandwidth of cellTime, MSG3_RB=3, MSG3_NUM=5；

And 2 continuous print frequency bands that now PUSCH is split by PRACH are a length of:

$N_{\mathrm{RB}}^{\mathrm{hole}1}=n_{\mathrm{prach}}-n_{\mathrm{part}1}^{\mathrm{pucch}}=0$

$N_{\mathrm{RB}}^{\mathrm{hole}2}=n_{\mathrm{part}2}^{\mathrm{pucch}}-n_{\mathrm{prach}}-N_{\mathrm{RB}}^{\mathrm{PRACH}}=38$

So:

$n_{\mathrm{msg}3}=n_{\mathrm{prach}}+N_{\mathrm{RB}}^{\mathrm{PRACH}}=9$

$N_{\mathrm{RB}}^{\mathrm{MSG}3}=\mathrm{MSG}3\_\mathrm{RB}*\mathrm{MSG}3\_\mathrm{NUM}=15$

$n_{\mathrm{bundling}}=n_{\mathrm{msg}3}+N_{\mathrm{RB}}^{\mathrm{MSG}3}=24$

$N_{\mathrm{RB}}^{\mathrm{BUND}}=N_{\mathrm{RB}}^{\mathrm{hole}2}-N_{\mathrm{RB}}^{\mathrm{MSG}3}=24$

That in the most whole upstream band, PRACH takies is 3 to No. 8 RB, and the range of distribution of MSG3 is 9 to 23 Number RB, TTI Bundling user distribution is 24 to No. 47 RB, then in scheduling, MSG3 and TTI Bundling exists According to the range of distribution point RB of oneself during resource distribution, if the user of TTI Bundling obtains in first time resource is distributed 24 to No. 26 RB, before having only at other data dispatch in 3 TTI of following continuous print by 24 to No. 26 RB to This user uses, and do not have MSG3 distributes 24 to No. 26 RB that are unknown with RB of its distribution and that cause in advance It is already allocated to the situation that MSG3 uses, because the RB distribution of MSG3 is merely able to 9 to No. 23 RB distributed amongst, from And solve its collision problem, simplify resource allocation process.

Above content is to combine specific embodiment further description made for the present invention, it is impossible to assert the tool of the present invention Body is implemented to be confined to these explanations.For general technical staff of the technical field of the invention, without departing from the present invention On the premise of design, it is also possible to make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.

Claims (6)

1. the resource allocation methods of TTI bundling in a LTE system, it is characterised in that comprise the steps of

Step 1, in cell configuration or reconfigure, obtains bandwidth of cell and the relevant configuration information of PUCCH and PRACH；

Step 2, calculates the physical resource position of PUCCH and PRACH according to configuration information；

Step 3, determines, according to bandwidth of cell, the maximum RB number that MSG3 can take；

Step 4, physical resource position and step 3 gained MSG3 according to step 2 gained PUCCH and PRACH can account for Maximum RB number, calculate the resource range of distribution of MSG3 and TTI Bundling user in scheduling process；

Step 5, carries out the RB distribution of MSG3 and TTI Bundling user in scheduling according to the result in step 4.

The resource allocation methods of TTI bundling in LTE system the most according to claim 1, it is characterised in that: step 1 gained The relevant configuration information of PUCCH and PRACH, the RB quantity taken including PUCCHPRACH channel Initial RB position n_prach。

The resource allocation methods of TTI bundling in LTE system the most according to claim 2, it is characterised in that: in step 2, The physical resource position mode calculating PUCCH is, calculates the RB position, coboundary of PUCCH occupied bandwidth low band portion PutCalculate the lower boundary RB position of PUCCH occupied bandwidth highband partRB that PUCCH takies numbered wherein from 0 toWithArrive

The physical resource position mode calculating PRACH is, according to the initial RB n of PRACH channel_prachContinuous with taking RB quantityThe RB that PRACH takies is numbered wherein from n_prachTo n_prach+5。

The resource allocation methods of TTI bundling in LTE system the most according to claim 3, it is characterised in that: in step 3, The maximum RB number that MSG3 can takeMSG3_NUM be a TTI The quantity of the MSG3 of multiprocessing, MSG3_RB is the RB quantity that a MSG3 needs to take, and MSG3_RB is according to community Bandwidth is preset.

The resource allocation methods of TTI bundling in LTE system the most according to claim 4, it is characterised in that: in step 4, The resource range of distribution calculation of MSG3 and TTI Bundling user is as follows,

First, calculate PUSCH channel according to the configuration of PRACH and be divided into 2 continuous print frequency band sizes by PRACH,

$N_{RB}^{hole1}=n_{prach}-n_{part1}^{pucch}$

$N_{RB}^{hole2}=n_{part2}^{pucch}-n_{prach}-N_{RB}^{PRACH}$

Wherein,WithRepresent that these 2 sequential frequency bands are able in Resource Block hole1, the hole2 used respectively The quantity of RB；

Then, calculate the range of distribution of MSG3 and TTI Bundling in the following manner,

If the RB quantity of the Resource Block hole1 that first sequential frequency band can use is less than 6, i.e.So:

$n_{msg3}=n_{prach}+N_{RB}^{PRACH}$

$N_{RB}^{MSG3}=MSG3\_RB\×MSG3\_NUM$

$n_{bundling}=n_{msg3}+N_{RB}^{MSG3}$

$N_{RB}^{BUND}=N_{RB}^{hole2}-N_{RB}^{MSG3}$

If the RB quantity of the Resource Block hole2 that second sequential frequency band can use is less than 6, i.e.So:

$n_{msg3}=n_{part1}^{pucch}$

$N_{RB}^{MSG3}=MSG3\_RB\×MSG3\_NUM$

$n_{bundling}=n_{msg3}+N_{RB}^{MSG3}$

$N_{RB}^{BUND}=N_{RB}^{hole1}-N_{RB}^{MSG3}$

When above 2 conditions are the most ungratified time,

If the RB quantity of the Resource Block hole1 that first sequential frequency band can use is less than or equal to second sequential frequency band During the quantity of the RB of the Resource Block hole2 that can use,

$n_{msg3}=n_{part1}^{pucch}$

$N_{RB}^{MSG3}=N_{RB}^{hole1}$

$n_{bundling}=n_{prach}+N_{RB}^{PRACH}$

$N_{RB}^{BUND}=N_{RB}^{hole2}$

Otherwise,

$n_{msg3}=n_{prach}+N_{RB}^{PRACH}$

$N_{RB}^{MSG3}=N_{RB}^{hole2}$

$n_{bundling}=n_{part1}^{pucch}$

$N_{RB}^{BUND}=N_{RB}^{hole1}$

Wherein, n_msg3Represent the initial RB numbering of MSG3 distribution,Represent the length that MSG3 can distribute；n_bundling Represent the initial RB numbering of TTI Bundling distribution,Represent the length that TTI Bundling can distribute.

The resource allocation methods of TTI bundling in LTE system the most according to claim 5, it is characterised in that: in step 5, It is included in each TTI and performs following sub-step,

Step 1051, initializes the relevant information of uplink scheduling；

Step 1052, process had distributed the scheduling of the TTI Bundling user of resource at current TTI, including first determining whether The resource requirement mark of TTI Bundling user,

Resource requirement is masked as very, then deduct, according to the RB position of distribution for the first time, the RB resource information being currently able in advance, Then judge that first time of current TTI and this TTI Bundling user is assigned to difference bundling_diff between the TTI of resource,

If bundling_diff is more than or equal to 4, if resource requirement is masked as vacation；

If bundling_diff is less than 4, then the RB resource location distributed according to first TTI of this TTI Bundling user is it Distribute the RB resource of current TTI；

Resource requirement is masked as vacation, then the next TTI Bundling user having distributed resource at current TTI of poll, directly Inquire about complete to all associated users, enter step 1053；

Step 1053, processes the scheduling of resource of MSG3, including judging the n that determines in step 4_msg3WithThe money limited Whether source also has can RB resource, be then to distribute RB resource subsequently into step 1053 for MSG3, the most directly enter Enter step 1054；

Step 1054, the scheduling of processes user data, including TTI Bundling user and the data of non-TTI Bundling user Scheduling, for the data dispatch of TTI Bundling user, it is first determined whether meet following 2 conditions,

When condition 1 is current scheduling, die sinking 4 is equal to 0, and expression is continuous 4 TTI same asset demands of TTI Bundling user First time resource distribution；

Condition 2 is the n determined in step 4_bundlingWithThe resource limited also has the RB resource of energy,

If meet the two condition simultaneously, carry out resource distribution, after being allocated successfully, this user is used for the money of TTI Bundling Demand mark position, source is true, enters step 1055；

Otherwise it is directly entered step 1055；

Step 1055, encapsulated layer interface message；

Step 1056, current TTI finishing scheduling.