CN105050195A - LTE-A network user scheduling method and device - Google Patents
LTE-A network user scheduling method and device Download PDFInfo
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Abstract
The invention discloses an LTE-A network user scheduling method and device. According to the method, a first proportion value occupied by an LTE user corresponding to a current CSI-RS subframe is compared with a second portion value occupied by an LTE user corresponding to the lat CSI-RS subframe, and a first average block error rate of the LTE user corresponding to the current CSI-RS subframe is compared with a second average block error rate of the LTE user corresponding to the last CSI-RS subframe, so that the transmission period of the CSI-RS subframes is adjusted dynamically, and performance decrease of LTE users caused by the CSI-RS subframes is dynamically reduced. Compared with the prior art, the CSI-RS subframe transmission period can be adjusted dynamically needless of setting thresholds manually, the whole user scheduling process is without interference of manual factors, and thus, the accuracy of user scheduling in the LTE-A network is improved.
Description
Technical field
The application relates to mobile communication technology field, more particularly, relates to dispatching method and the device of a kind of LTE-A network user.
Background technology
In order to support higher downlink transmission rate, at current LTE-A (LongTermEvolutionAdvanced, long-term evolution strengthening technology) in network, introduce CSI-RS subframe (ChannelStatementInformationReferenceSignal, channel state information reference signals).CSI-RS subframe improves the accuracy that down channel measures and supports the descending MIMO of higher exponent number simultaneously, thus can improve the descending performance of LTE-A user.But, when CSI-RS sub-frame transmission, because original LTE user can not identify the CSI-RS subframe introduced in LTE-A, be still seen as effective user's downlink data, thus have impact on the demodulation performance of LTE user.
The introducing of CSI-RS subframe in LTE-A network improves LTE-A user performance on the one hand, loss can be brought on the other hand to LTE user performance original in network, so how between both performance, to obtain compromise when the user of these two different editions coexists, this is the problem having to solve in real network is disposed.
For this reason, the dispatching method of user is decided in the prior art by comparing LTE user's proportion value and predetermined threshold value.But LTE user and LTE-A number of users are changes of constantly floating in real network, and this predetermined threshold value is artificial setting, thus cannot ensure the accuracy of user scheduling.
Summary of the invention
In view of this, the application provides dispatching method and the device of a kind of LTE-A network user, to improve the accuracy of LTE-A network user scheduling.
To achieve these goals, the existing scheme proposed is as follows:
A LTE-A network user's dispatching method, comprising:
Set up LTE user list and LTE-A user list that present sub-frame needs descending scheduling;
If when present sub-frame is CSI-RS subframe, calculate first average block error rate of LTE user corresponding to current C SI-RS subframe shared first ratio value and LTE user in all users of LTE-A network;
If during the non-first CSI-RS subframe of present sub-frame, more described first ratio value and LTE user second ratio value corresponding to last CSI-RS subframe, and second average block error rate of the first average block error rate and LTE user corresponding to last CSI-RS subframe;
According to the comparative result of described first ratio value and described second ratio value, and the comparative result of described first average block error rate and the second average block error rate, the transmission cycle of CSI-RS subframe is adjusted.
Preferably, described LTE user list and the LTE-A user list set up present sub-frame and need descending scheduling, comprising:
Obtain all users that present sub-frame needs descending scheduling;
Judge whether each user is configured with CSI-RS;
If so, then using this user as LTE-A user, if not then using this user as LTE user;
Set up LET-A user list and LTE user list.
Preferably, first average block error rate of the LTE user that described calculating current C SI-RS subframe is corresponding, comprising:
Obtain the Block Error Rate of each LTE user corresponding to current C SI-RS;
Calculate the mean value of the Block Error Rate of all LTE users, obtain described first average block error rate.
Preferably, the described comparative result according to described first ratio value and described second ratio value, and the comparative result of described first average block error rate and the second average block error rate, adjust the transmission cycle of CSI-RS subframe, comprising:
If described first ratio value is greater than described second ratio value, and described first average block error rate is greater than described second average block error rate, then the transmission cycle of CSI-RS subframe is set to 2 times of currency;
If described first ratio value is greater than described second ratio value, and described first average block error rate is less than or equal to described second average block error rate, then keep the transmission cycle of CSI-RS subframe constant;
If described first ratio value is less than described second ratio value, and described first average block error rate is less than described second average block error rate, then the transmission cycle of CSI-RS subframe is set to the half of currency;
If described first ratio value is less than described second ratio value, and described first average block error rate is greater than described second average block error rate, then the transmission cycle of CSI-RS subframe is set to 2 times when time value.
Preferably, after the described transmission cycle to CSI-RS subframe adjusts, also comprise:
Determine present sub-frame type, the first maximum scheduling metrics value and the second maximum scheduling metrics value; Wherein, described first maximum scheduling metrics value is the maximum scheduling metrics value in all LTE users, and described second maximum scheduling metrics value is the maximum scheduling metrics value in all LTE-A users;
According to present sub-frame type, the first maximum scheduling metrics value and the second maximum scheduling metrics value, adjustment LTE user list and LTE-A user list.
Preferably, after the described transmission cycle to CSI-RS subframe adjusts, also comprise:
Determine the maximum dispatched users number of present sub-frame type and present sub-frame;
According to the maximum dispatched users number of present sub-frame type and present sub-frame, adjustment LTE user list and LTE-A user list.
Preferably, describedly determine the first maximum scheduling metrics value and the second maximum scheduling metrics value, comprising:
The scheduling metrics value of each LTE user and each LTE-A user is calculated according to preset formula;
Using scheduling metrics value maximum in all LTE users as the first maximum scheduling metrics value, scheduling metrics value maximum in all LTE-A users is as the second maximum scheduling metrics value;
Wherein, described preset formula is M=QOS/BLER, M=N/BLER or M=N*QOS;
M is scheduling metrics value, N is downlink data amount, BLER is Block Error Rate, QOS is service quality value
A LTE-A network user's dispatching device, comprising:
User list creating unit, needs LTE user list and the LTE-A user list of descending scheduling for setting up present sub-frame;
Computing unit, if when being CSI-RS subframe for present sub-frame, calculates first average block error rate of LTE user corresponding to current C IS-RS subframe shared first ratio value and LTE user in all users of LTE-A network;
Comparing unit, if during first CSI-RS subframe non-for present sub-frame, more described first ratio value and LTE user second ratio value corresponding to last CSI-RS subframe, and second average block error rate of the first average block error rate and LTE user corresponding to last CSI-RS subframe;
Cycle adjusting unit, for the comparative result according to described first ratio value and described second ratio value, and the comparative result of described first average block error rate and the second average block error rate, the transmission cycle of CSI-RS subframe is adjusted.
Preferably, described user list creating unit comprises:
User gathers subelement, needs all users of descending scheduling for obtaining present sub-frame;
User type determination subelement, for judging whether each user is configured with CSI-RS, if so, then using this user as LTE-A user, if not then using this user as LTE user;
List creating subelement, for setting up LET-A user list and LTE user list.
Preferably, described computing unit comprises:
First computation subunit, for calculating LTE user corresponding to current C IS-RS subframe shared first ratio value in all users of LTE-A network;
Block Error Rate gathers subelement, for obtaining the Block Error Rate of each LTE user corresponding to current C SI-RS;
Second computation subunit, for calculating the mean value of the Block Error Rate of all LTE users, obtains described first average block error rate.
Through as shown from the above technical solution, this application discloses dispatching method and the device of a kind of LTE-A network user.The method is by comparing the second ratio value shared by the first ratio value shared by the corresponding LTE user of current C SI-RS subframe and LTE user corresponding to a upper CSI subframe, and second average block error rate of first average block error rate of LTE user corresponding to current C SI-RS subframe and LTE user corresponding to a upper CSI-RS subframe, carry out the transmission cycle of dynamic conditioning CSI-RS subframe, dynamically reduce the hydraulic performance decline that CSI-RS subframe is brought to LTE user.Compared with prior art, the present invention can realize the dynamic conditioning to the CRI-RS sub-frame transmission cycle, without the need to artificially arranging threshold value, that is in whole user scheduling process without the interference of human factor, thus improve the accuracy of user scheduling in LTE-A network.
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 embodiments of the 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 the accompanying drawing provided.
Fig. 1 shows the dispatching method of a kind of LTE-A network user disclosed in one embodiment of the invention;
Fig. 2 shows a kind of LTE-A network user scheduling method disclosed in another embodiment of the present invention;
Fig. 3 shows a kind of LTE-A network user scheduling method disclosed in another embodiment of the present invention;
Fig. 4 shows a kind of LTE-A network user dispatching device disclosed in another embodiment of 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.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.
Embodiment one
The dispatching method of a kind of LTE-A network user disclosed in one embodiment of the invention is shown see Fig. 1, Fig. 1.
As shown in Figure 1, in the present embodiment, the method comprises:
101: set up the LTE user list and LTE-A user list that present sub-frame need descending scheduling.
Optionally, obtain on present sub-frame by base station and need all users carrying out descending scheduling, then whether be configured with CSI-RS according to user and user is included in the user list of corresponding establishment.If this user is configured with CSI-RS, this user is included in LTE-A user list, otherwise if do not configure CSI-RS, this user is added in LTE user list.
102: when present sub-frame is CIS-RS subframe, calculate first average block error rate of LTE user corresponding to current C IS-RS subframe shared first ratio value and LTE user in all users of LTE-A network.
This process specifically comprises:
A: judge present sub-frame type.
Judge whether present sub-frame is CSI-RS subframe (namely judging whether present sub-frame is configured with needs to carry out CSI-RS transmission).Its deterministic process is as follows:
Whether present sub-frame is that CSI-RS subframe can according to formula:
judge with the CSI-RS side-play amount configured and cycle.
Wherein: n
frepresentative system frame number, n
srepresent timeslot number, Δ
cSI-RSrepresent CSI-RS side-play amount, T
cSI-RSrepresent CSI-RS period of sub-frame.
B: calculate the first ratio value shared by LTE user that present sub-frame is corresponding.
Concrete, if present sub-frame is CSI-RS subframe, the LTE user list in statistic procedure 101 and the number of users in LTE-A user list, calculate LTE user's proportion value, i.e. the first ratio value.
C: the first average block error rate calculating LTE user corresponding to present sub-frame.
Block Error Rate includes user uplink and descending Block Error Rate, because only relate to the transmission of down user data here, so Block Error Rate mentioned here only refers to descending Block Error Rate.
Concrete, obtain the descending Block Error Rate of each LTE user, then descending Block Error Rates all in user list is averaged, i.e. the first average block error rate.
103: if during the non-first CSI-RS subframe of present sub-frame, more described first ratio value and LTE user second ratio value corresponding to last CSI-RS subframe, and second average block error rate of the first average block error rate and LTE user corresponding to last CSI-RS subframe.
It should be noted that, when to need to precalculate current C SI-RS subframe in comparison procedure be system first CSI-RS subframe, the ratio value of LTE user and average block error rate.
Judge that whether present sub-frame is first CSI-RS subframe of system configuration, its Rule of judgment judges above seeing whether present sub-frame is whether meet in CSI-RS sub-frame procedure
if meet this condition, present sub-frame is first CSI-RS subframe in system, otherwise current C SI-RS subframe is not first CSI-RS subframe in system.
104: according to the comparative result of described first ratio value and described second ratio value, and the comparative result of described first average block error rate and the second average block error rate, the transmission cycle of CSI-RS subframe is adjusted.
Optionally, if described first ratio value is greater than described second ratio value, and described first average block error rate is greater than described second average block error rate, then the transmission cycle of CSI-RS subframe is set to 2 times of currency;
If described first ratio value is greater than described second ratio value, and described first average block error rate is less than or equal to described second average block error rate, then keep the transmission cycle of CSI-RS subframe constant;
If described first ratio value is less than described second ratio value, and described first average block error rate is less than described second average block error rate, then the transmission cycle of CSI-RS subframe is set to the half of currency;
If described first ratio value is less than described second ratio value, and described first average block error rate is greater than described second average block error rate, then the transmission cycle of CSI-RS subframe is set to 2 times when time value.
From embodiment one, this application discloses the dispatching method of a kind of LTE-A network user.The method is by comparing the second ratio value shared by the first ratio value shared by the corresponding LTE user of current C SI-RS subframe and LTE user corresponding to a upper CSI subframe, and second average block error rate of first average block error rate of LTE user corresponding to current C SI-RS subframe and LTE user corresponding to a upper CSI-RS subframe, carry out the transmission cycle of dynamic conditioning CSI-RS subframe, dynamically reduce the hydraulic performance decline that CSI-RS subframe is brought to LTE user.Compared with prior art, the present invention can realize the dynamic conditioning to the CRI-RS sub-frame transmission cycle, without the need to artificially arranging threshold value, that is in whole user scheduling process without the interference of human factor, thus improve the accuracy of user scheduling in LTE-A network.
Embodiment two
A kind of LTE-A network user scheduling method disclosed in another embodiment of the present invention is shown see Fig. 2, Fig. 2.In the present embodiment after completing the adjustment to the CSI-RS sub-frame transmission cycle, the LTE user list set up and LTE-A user list are adjusted, to optimize the user scheduling of LTE-A network further.
As shown in Figure 2, the method comprises:
201: set up the LTE user list and LTE-A user list that present sub-frame need descending scheduling.
202: when present sub-frame is CIS-RS subframe, calculate first average block error rate of LTE user corresponding to current C IS-RS subframe shared first ratio value and LTE user in all users of LTE-A network;
203: if during the non-first CSI-RS subframe of present sub-frame, more described first ratio value and LTE user second ratio value corresponding to last CSI-RS subframe, and second average block error rate of the first average block error rate and LTE user corresponding to last CSI-RS subframe.
204: according to the comparative result of described first ratio value and described second ratio value, and the comparative result of described first average block error rate and the second average block error rate, the transmission cycle of CSI-RS subframe is adjusted.
205: determine present sub-frame type, the first maximum scheduling metrics value and the second maximum scheduling metrics value.
Wherein, described first maximum scheduling metrics value is value maximum in the scheduling metrics value of all LTE users, and the second maximum scheduling metrics value is value maximum in the scheduling metrics value of all LTE-A users.
It should be noted that, because different business is different to the requirement of LTE-A network, thus operating personnel can define described scheduling metrics value according to different business needs in the present embodiment.
Optionally, those service quality QOS values (QualityofService) to business are required that comparatively strict system then can define scheduling degree metric M=QOS/BLER.
Can consider to use the ratio of downlink data amount and Block Error Rate as scheduling metrics value, i.e. M=N/BLER for those systems larger to downlink data amount.
To QOS and downlink data amount, simultaneously higher system is required for those, the downlink data amount of use user and the long-pending as scheduling metrics value, i.e. M=N*QOS of QOS metric can be considered.
Wherein, M is scheduling metrics value, N is downlink data amount, BLER is Block Error Rate, QOS is service quality value.
206: according to present sub-frame type, the first maximum scheduling metrics value and the second maximum scheduling metrics value, adjustment LTE user list and LTE-A user list.
Wherein, if when present sub-frame is CSI subframe, searching loop LTE-A user list, then the scheduling metrics value judging whether to exist in LTE-A user list user is greater than the user of the first maximum scheduling metrics value, if exist, the front end that this LTE-A user joins LTE user list is entered in user list.
If current subframe is CSI-RS subframe, then searching loop LTE user list, then judge whether to exist in LTE user list the user that user scheduling metric is greater than the second maximum scheduling metrics value, if exist, this LTE user is joined the front end of LTE-A user list, and adjust the MCS (ModulationandCodingScheme, modulation and coding strategy) of this LTE user.
Here the step adjusting the MCS of this LTE user is as follows:
Then the Block Error Rate extracting this LTE user judges whether its Block Error Rate is greater than 0.1.
If the Block Error Rate of current LTE user is greater than 0.1, and active user reports the MCS value of acquisition to be greater than 1 according to channel measurement that its MCS value is deducted 2 on original basis; If the Block Error Rate of current LTE user is less than 0.1, its MCS value is set on the original basis obtaining income value through channel measurement, deduct 1.
Embodiment three
A kind of LTE-A network user scheduling method disclosed in another embodiment of the present invention is shown see Fig. 3, Fig. 3.
301: set up the LTE user list and LTE-A user list that present sub-frame need descending scheduling.
302: when present sub-frame is CIS-RS subframe, calculate first average block error rate of LTE user corresponding to current C IS-RS subframe shared first ratio value and LTE user in all users of LTE-A network;
303: if during the non-first CSI-RS subframe of present sub-frame, more described first ratio value and LTE user second ratio value corresponding to last CSI-RS subframe, and second average block error rate of the first average block error rate and LTE user corresponding to last CSI-RS subframe.
304: according to the comparative result of described first ratio value and described second ratio value, and the comparative result of described first average block error rate and the second average block error rate, the transmission cycle of CSI-RS subframe is adjusted.
305: the maximum dispatched users number determining present sub-frame type and present sub-frame.
306: according to the maximum dispatched users number of present sub-frame type and present sub-frame, adjustment LTE user list and LTE-A user list.
Wherein, present sub-frame is CSI subframe, if number of users is greater than the maximum dispatched users number of present sub-frame (because on descending sub frame, running time-frequency resource is limited in current LTE user list, so the number of users can dispatched in single subframe is limited, here 60% of community user number is got), then a part of LTE user less for user scheduling metric in LTE user list is shifted out list and equal the maximum dispatched users number of descending sub frame to meet number of users in LTE user list; If number of users is less than the maximum dispatched users number of descending sub frame in current LTE user list, then continue user larger for user metric value in LTE-A user list to put into until meet number of users in LTE user list to equal the maximum dispatched users number of descending sub frame in LTE user list, form the user list finally can dispatched.
Present sub-frame is CSI-RS subframe, if number of users is greater than maximum downstream dispatched users number in current LTE-A user list, then shifts out a part of user less for user scheduling metric in LTE-A user list to meet number of users in LTE-A user list and equal the maximum dispatched users number of descending sub frame; If number of users is less than the maximum dispatched users number of descending sub frame in current LTE-A user list, then choose the larger a part of user of user scheduling metric in LTE user list to put it in LTE-A user list and make number of users in LTE-A user list equal the maximum dispatched users number of descending sub frame, meanwhile needing to adjust the MCS of this part LTE user in order to reduce CSI-RS to the performance loss that LTE user brings, forming the user list finally can dispatched.Here set-up procedure is as follows:
Then the Block Error Rate extracting this LTE user judges whether its Block Error Rate is greater than 0.1.
If the Block Error Rate of current LTE user is greater than 0.1, and active user reports the MCS value of acquisition to be greater than 1 according to channel measurement that its MCS value is deducted 2 on original basis; If the Block Error Rate of current LTE user is less than 0.1, its MCS value is set on the original basis obtaining income value through channel measurement, deduct 1.
It should be noted that, in order to further optimizing user dispatching method in other embodiments disclosed by the invention, can on the basis of embodiment two, further according to the maximum dispatched users number of present sub-frame type and present sub-frame, adjustment LTE user list and LTE-A user list, to realize the optimization of user scheduling.
Described on total, above embodiment disclosed by the invention has the following advantages:
1. the calculating of user metric value.The new metric for weighing dispatching priority of users---a user scheduling metric is introduced in the program, wherein QOS value, embody the priority of customer service, BLER is user's Block Error Rate, indirectly embody the quality of user performance, Block Error Rate less user's receiving terminal performance is better, here with the degrees of priority levels value that this ratio is user scheduling, make service priority higher and the user of better performances preferentially can obtain resource, meet User Priority requirement to a certain extent;
2. dynamic subscriber selects and sequence.Adjust user list and scheduling sequencing that present sub-frame can be dispatched according to the user scheduling metric of up-to-date introducing and the maximum dispatched users number of descending sub frame, not only ensure that the QOS of customer service requires but also guarantees the most effectively utilizing of resource.
3. the dynamic conditioning CSI-RS transmission cycle.According to the Block Error Rate dynamic conditioning CSI-RS transmission cycle of LTE user's proportion value and LTE user in community, reduce loss to the full extent, ensure that CSI-RS period assignment makes systematic function reach best.
Embodiment four
A kind of LTE-A network user dispatching device disclosed in another embodiment of the present invention is shown see Fig. 4, Fig. 4.
As shown in Figure 4, this device comprises: user list creating unit 1, computing unit 2, comparing unit 3 and cycle adjusting unit 4.
Wherein, user list creating unit needs LTE user list and the LTE-A user list of descending scheduling for setting up present sub-frame.Concrete, this user is configured with CSI-RS and then this user is included in LTE-A user list, otherwise if do not configure CSI-RS, this user is added in LTE user list.
When computing unit is CSI-RS subframe for present sub-frame, calculate first average block error rate of LTE user corresponding to current C SI-RS subframe shared first ratio value and LTE user in all users of LTE-A network.
When comparing unit is used for present sub-frame non-first CSI-RS subframe, more described first ratio value and LTE user second ratio value corresponding to last CSI-RS subframe, and second average block error rate of the first average block error rate and LTE user corresponding to last CSI-RS subframe.
Cycle adjusting unit is used for the comparative result according to described first ratio value and described second ratio value, and the comparative result of described first average block error rate and the second average block error rate, adjusts the transmission cycle of CSI-RS subframe.
It should be noted that, device disclosed in the present embodiment is suitable for mutually with the dispatching method of LTE-A network user a kind of disclosed in embodiment one.The specific implementation of the user list creating unit of this device, computing unit, comparing unit and CSI-RS period of sub-frame adjustment unit illustrates in embodiment one, and therefore not to repeat here.
Optionally, in other embodiments disclosed by the invention, the user list creating unit of this device comprises: user gathers subelement, user type determination subelement and list creating subelement.Wherein, user gathers subelement needs descending scheduling all users for obtaining present sub-frame.User type determination subelement, for judging whether each user is configured with CSI-RS, if so, then using this user as LTE-A user, if not then using this user as LTE user.List creating subelement, for setting up LET-A user list and LTE user list.
The computing unit of this device comprises: the first computation subunit, Block Error Rate gather subelement and the second computation subunit.Wherein, the first computation subunit is for calculating LTE user corresponding to current C IS-RS subframe shared first ratio value in all users of LTE-A network.Block Error Rate gathers subelement, for obtaining the Block Error Rate of each LTE user corresponding to current C SI-RS.Second computation subunit, for calculating the mean value of the Block Error Rate of all LTE users, obtains described first average block error rate.
Finally, also it should be noted that, in this article, the such as relational terms of first and second grades and so on is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply the relation that there is any this reality between these entities or operation or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, article or equipment and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, article or equipment.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment comprising described key element and also there is other identical element.
In this specification, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a LTE-A network user's dispatching method, is characterized in that, comprising:
Set up LTE user list and LTE-A user list that present sub-frame needs descending scheduling;
If when present sub-frame is CSI-RS subframe, calculate first average block error rate of LTE user corresponding to current C SI-RS subframe shared first ratio value and LTE user in all users of LTE-A network;
If during the non-first CSI-RS subframe of present sub-frame, more described first ratio value and LTE user second ratio value corresponding to last CSI-RS subframe, and second average block error rate of the first average block error rate and LTE user corresponding to last CSI-RS subframe;
According to the comparative result of described first ratio value and described second ratio value, and the comparative result of described first average block error rate and the second average block error rate, the transmission cycle of CSI-RS subframe is adjusted.
2. method according to claim 1, is characterized in that, described LTE user list and the LTE-A user list set up present sub-frame and need descending scheduling, comprising:
Obtain all users that present sub-frame needs descending scheduling;
Judge whether each user is configured with CSI-RS;
If so, then using this user as LTE-A user, if not then using this user as LTE user;
Set up LET-A user list and LTE user list.
3. method according to claim 1, is characterized in that, first average block error rate of the LTE user that described calculating current C SI-RS subframe is corresponding, comprising:
Obtain the Block Error Rate of each LTE user corresponding to current C SI-RS;
Calculate the mean value of the Block Error Rate of all LTE users, obtain described first average block error rate.
4. method according to claim 1, it is characterized in that, the described comparative result according to described first ratio value and described second ratio value, and the comparative result of described first average block error rate and the second average block error rate, the transmission cycle of CSI-RS subframe is adjusted, comprising:
If described first ratio value is greater than described second ratio value, and described first average block error rate is greater than described second average block error rate, then the transmission cycle of CSI-RS subframe is set to 2 times of currency;
If described first ratio value is greater than described second ratio value, and described first average block error rate is less than or equal to described second average block error rate, then keep the transmission cycle of CSI-RS subframe constant;
If described first ratio value is less than described second ratio value, and described first average block error rate is less than described second average block error rate, then the transmission cycle of CSI-RS subframe is set to the half of currency;
If described first ratio value is less than described second ratio value, and described first average block error rate is greater than described second average block error rate, then the transmission cycle of CSI-RS subframe is set to 2 times when time value.
5. method according to claim 1, is characterized in that, after the described transmission cycle to CSI-RS subframe adjusts, also comprises:
Determine present sub-frame type, the first maximum scheduling metrics value and the second maximum scheduling metrics value; Wherein, described first maximum scheduling metrics value is the maximum scheduling metrics value in all LTE users, and described second maximum scheduling metrics value is the maximum scheduling metrics value in all LTE-A users;
According to present sub-frame type, the first maximum scheduling metrics value and the second maximum scheduling metrics value, adjustment LTE user list and LTE-A user list.
6. method according to claim 1 or 5, is characterized in that, after the described transmission cycle to CSI-RS subframe adjusts, also comprise:
Determine the maximum dispatched users number of present sub-frame type and present sub-frame;
According to the maximum dispatched users number of present sub-frame type and present sub-frame, adjustment LTE user list and LTE-A user list.
7. method according to claim 5, is characterized in that, describedly determines the first maximum scheduling metrics value and the second maximum scheduling metrics value, comprising:
The scheduling metrics value of each LTE user and each LTE-A user is calculated according to preset formula;
Using scheduling metrics value maximum in all LTE users as the first maximum scheduling metrics value, scheduling metrics value maximum in all LTE-A users is as the second maximum scheduling metrics value;
Wherein, described preset formula is M=QOS/BLER, M=N/BLER or M=N*QOS;
M is scheduling metrics value, N is downlink data amount, BLER is Block Error Rate, QOS is service quality value.
8. a LTE-A network user's dispatching device, is characterized in that, comprising:
User list creating unit, needs LTE user list and the LTE-A user list of descending scheduling for setting up present sub-frame;
Computing unit, if when being CSI-RS subframe for present sub-frame, calculates first average block error rate of LTE user corresponding to current C IS-RS subframe shared first ratio value and LTE user in all users of LTE-A network;
Comparing unit, if during first CSI-RS subframe non-for present sub-frame, more described first ratio value and LTE user second ratio value corresponding to last CSI-RS subframe, and second average block error rate of the first average block error rate and LTE user corresponding to last CSI-RS subframe;
Cycle adjusting unit, for the comparative result according to described first ratio value and described second ratio value, and the comparative result of described first average block error rate and the second average block error rate, the transmission cycle of CSI-RS subframe is adjusted.
9. device according to claim 7, is characterized in that, described user list creating unit comprises:
User gathers subelement, needs all users of descending scheduling for obtaining present sub-frame;
User type determination subelement, for judging whether each user is configured with CSI-RS, if so, then using this user as LTE-A user, if not then using this user as LTE user;
List creating subelement, for setting up LET-A user list and LTE user list.
10. device according to claim 7, is characterized in that, described computing unit comprises:
First computation subunit, for calculating LTE user corresponding to current C IS-RS subframe shared first ratio value in all users of LTE-A network;
Block Error Rate gathers subelement, for obtaining the Block Error Rate of each LTE user corresponding to current C SI-RS;
Second computation subunit, for calculating the mean value of the Block Error Rate of all LTE users, obtains described first average block error rate.
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