CN103684555A - Switching method and device in uplink channel MIMO modes - Google Patents
Switching method and device in uplink channel MIMO modes Download PDFInfo
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Abstract
The embodiment of the invention discloses a switching method and device in uplink channel MIMO modes. The method includes the steps that a reported RI is obtained; an MCS under a current RI of an uplink channel is obtained, and the current spectral efficiency of the uplink channel is calculated; if the uplink channel is currently in the MU-MIMO mode, and the current spectral efficiency is smaller than the corresponding spectral efficiency when the value of the RI is equal to 1, the MU-MIMO mode is switched to be the SU-MIMO mode to transmit data; if the uplink channel is currently in the SU-MIMO mode, the current spectral efficiency is larger than the corresponding spectral efficiency when the value of the RI is equal to 1, and the value of the current RI is larger than or equal to 1.5, the SU-MIMO mode is switched to be the MU-MIMO mode to transmit the data. Therefore, the corresponding spectral efficiency is calculated according to MCSs, collected in real time, of the uplink channel, the mode of obtaining the spectral efficiency is more accurate, and the calculation result of the spectral efficiency can be further correspondingly adjusted according to the values of the MCSs under the actual working environment.
Description
Technical field
The present invention relates to communication field, particularly relate to a kind of MIMO intra-mode handover method and apparatus of up channel.
Background technology
At present, advanced long-term evolution system (Long Term Evolution-Advanced, LTE-A) Multiple Input Multiple Output (the Multiple-Input Multiple-Output that adopt in the transfer of data of up channel more, MIMO) technical support, MIMO technology is to apply many antennas in base station and terminal simultaneously, is not needing, under the prerequisite of additional bandwidth, to improve the peak rate at alone family, thereby further increase power system capacity, improve frequency spectrum speed.
MIMO technology is divided into alone family MIMO mode (Single User-Multiple-Input Multiple-Output at present, SU-MIMO) and multi-user's MIMO mode (Multi User-Multiple-Input Multiple-Output, MU-MIMO), in the application of the up channel of LTE-A, generally can in SU-MIMO and MU-MIMO pattern, switch according to the variation of running parameter.For judging that when switching the parameter of MIMO pattern most important is exactly the spectrum efficiency of subscriber equipment.
In prior art, the numerical value of the spectrum efficiency of subscriber equipment is all generally to adopt estimation, or by experience, carrying out assignment obtains, this makes when using spectrum efficiency what calculates constantly to switch current MIMO pattern precision not high, and cannot carry out corresponding adjustment according to the variation of current operating state.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of MIMO intra-mode handover method and apparatus of up channel, change the obtain manner of spectrum efficiency, improved switching precision.
The embodiment of the invention discloses following technical scheme:
A MIMO intra-mode handover method for up channel is used alternatingly alone family MIMO mode SU-MIMO and multi-user's MIMO mode MU-MIMO and carries out transfer of data in the up channel of advanced long-term evolution system LTE-A, comprising:
Obtain the order indication RI reporting;
Obtain the modulation coding mode MCS under the current RI of up channel;
According to described MCS, table look-up and obtain the bit number of each transport block transmission;
According to described bit number, calculate the current spectrum efficiency of up channel;
While using MU-MIMO pattern as current up channel, if current spectrum efficiency is less than spectrum efficiency corresponding when the value of RI equals 1, at up channel, switches to SU-MIMO pattern and carry out transfer of data;
While using SU-MIMO pattern as current up channel, if current spectrum efficiency is greater than the value of spectrum efficiency corresponding when the value of RI equals 1 and current RI while being more than or equal to 1.5, at up channel, switches to MU-MIMO pattern and carry out transfer of data.
Preferably, when up channel carries out transfer of data, also comprise:
Obtain primary user's equipment UE;
According to the service bearer ability of subband spectrum efficiency and main UE, calculate the scheduling metric of main UE;
According to described scheduling metric, it is described main UE distribute data resource.
Preferably, described according to the service bearer ability of subband spectrum efficiency and main UE, calculate the scheduling metric of main UE, specifically comprise:
According to the service bearer ability of subband spectrum efficiency and main UE, use max carrier to interference algorithm MaxC/I to calculate scheduling metric;
Described max carrier to interference algorithm calculates scheduling metric:
w
sch=w
ue-QoS*w
sb-se
Wherein, w
ue-QoSbe the service bearer ability of main UE, w
sb-sefor subband spectrum efficiency.
Preferably, described according to the service bearer ability of subband spectrum efficiency and main UE, calculate the scheduling metric of main UE, specifically comprise:
According to the service bearer ability usage ratio fair algorithm PF of subband spectrum efficiency and main UE, calculate scheduling metric;
Described equitable proportion algorithm calculates scheduling metric:
w
sch=w
ue-QoS*w
sb-se/w
ue-th
Wherein, w
ue-QoSbe the service bearer ability of main UE, w
sb-sefor subband spectrum efficiency, w
ue-thbe the service bearer amount of main UE to realize.
Preferably, described is described main UE distribute data resource according to described scheduling metric, specifically comprises:
Obtain each main UE corresponding to the scheduling metric of an idle Physical Resource Block PRB;
Described idle PRB is distributed to the main UE of the scheduling metric maximum of corresponding described idle Physical Resource Block.
A MIMO intra-mode changing device for up channel is used alternatingly alone family MIMO mode SU-MIMO and multi-user's MIMO mode MU-MIMO and carries out transfer of data in the up channel of advanced long-term evolution system LTE-A, comprising:
Obtain RI unit, for obtaining the order indication RI reporting;
Obtain MCS unit, for obtaining the modulation coding mode MCS under the current RI of up channel;
Determine bit number unit, for tabling look-up and obtain the bit number of each transport block transmission according to described MCS;
Determine spectrum efficiency unit, for calculate the current spectrum efficiency of up channel according to described bit number;
First data transmission unit, while being used for using MU-MIMO pattern as current up channel, if the determined current spectrum efficiency in described definite spectrum efficiency unit is less than spectrum efficiency corresponding when the value of RI equals 1, at up channel, switches to SU-MIMO pattern and carry out transfer of data;
The second data transmission unit, while being used for using SU-MIMO pattern as current up channel, if when the value that the determined current spectrum efficiency in described definite spectrum efficiency unit is greater than spectrum efficiency corresponding when the value of RI equals 1 and current RI is more than or equal to 1.5, switches to MU-MIMO pattern at up channel and carry out transfer of data.
Preferably, described first data transmission unit and the second data transmission unit, also comprise:
Obtain UE unit, for obtaining primary user's equipment UE;
Calculate scheduling metric unit, for according to the service bearer ability of subband spectrum efficiency and main UE, calculate the scheduling metric of main UE;
Data resource allocation units, for according to described scheduling metric being described main UE distribute data resource.
Preferably, described calculating scheduling metric unit, specifically for:
According to the service bearer ability of subband spectrum efficiency and main UE, use max carrier to interference algorithm MaxC/I to calculate scheduling metric;
Described max carrier to interference algorithm calculates scheduling metric:
w
sch=w
ue-QoS*w
sb-se
Wherein, w
ue-QoSbe the service bearer ability of main UE, w
sb-sefor subband spectrum efficiency.
Preferably, described calculating scheduling metric unit, specifically for:
According to the service bearer ability usage ratio fair algorithm PF of subband spectrum efficiency and main UE, calculate scheduling metric;
Described equitable proportion algorithm calculates scheduling metric:
w
sch=w
ue-QoS*w
sb-se/w
ue-th
Wherein, w
ue-QoSbe the service bearer ability of main UE, w
sb-sefor subband spectrum efficiency, w
ue-thbe the service bearer amount of main UE to realize.
Preferably, described data resource allocation units, specifically comprise:
Obtain scheduling metric subelement, for obtaining each main UE corresponding to the scheduling metric of an idle Physical Resource Block PRB;
Idle PRB distributes subelement, for described idle PRB being distributed to the main UE of the scheduling metric maximum of corresponding described idle Physical Resource Block.
By technique scheme, can be found out, according to the MCS of Real-time Collection up channel, calculate corresponding spectrum efficiency, this mode of obtaining spectrum efficiency is more accurate, and can be according to the corresponding result of calculation of adjusting spectrum efficiency of the value of the MCS under actual operational environment, make thus according to the spectrum efficiency of obtaining in this way determine switch MIMO pattern time point more accurately and can the adjustment of correspondence along with the variation of the value of MCS lower in work at present environment.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the method flow diagram of the MIMO intra-mode handover method of a kind of up channel of the present invention;
Fig. 2 is MIMO intra-mode handover schematic diagram of the present invention;
Fig. 3 is the method flow diagram that the present invention calculates UE scheduling metric;
Fig. 4 is the method flow diagram that resource of the present invention is distributed;
Fig. 5 is one of the structure drawing of device of the MIMO intra-mode changing device of a kind of up channel of the present invention;
Fig. 6 be a kind of up channel of the present invention MIMO intra-mode changing device structure drawing of device two;
Fig. 7 be a kind of up channel of the present invention MIMO intra-mode changing device structure drawing of device three.
Embodiment
The embodiment of the present invention provides a kind of MIMO intra-mode handover method and apparatus of up channel.First, need to describe the uplink scheduling of LTE-A system, in the uplink scheduling of the up channel of LTE-A system, domain scheduling and frequency domain dispatching while being mainly divided into, time domain scheduling be mainly to switch at suitable time point the MIMO pattern adopting in up channel, such as changing to MU-MIMO pattern from SU-MIMO intra-mode or changing to SU-MIMO pattern from MU-MIMO intra-mode, when switch is mainly to rely on the numerical values recited of the spectrum efficiency of passing through up channel and received order indication (Rank Indicator, RI) numerical value, and how accurately, can be relevant to work at present environmental parameter obtain spectrum efficiency technical scheme of the present invention just, according to the modulation coding mode of Real-time Collection up channel (Modulation and Coding Scheme, MCS) calculate corresponding spectrum efficiency, this mode of obtaining spectrum efficiency is more accurate, and can be according to the corresponding result of calculation of adjusting spectrum efficiency of the value of the MCS under actual operational environment, make thus according to the spectrum efficiency obtained in this way calculate switch MIMO pattern time point more accurately and can the adjustment of correspondence along with the variation of the value of MCS lower in work at present environment.
After determining current MIMO pattern, by rational account form, calculate the scheduling metric of subscriber equipment (User equipment, UE), and carry out frequency domain dispatching with this metric, complete the distribution of idle Physical Resource Block (Physical Resource Block, PRB).A technical scheme of the present invention considers that the service bearer amount of UE and subband spectrum efficiency all can exert an influence to scheduling metric, thus when scheduling metric, service bearer amount and subband spectrum efficiency, all as computing reference, have been improved to the accuracy of the scheduling metric obtaining thus.
When distributing idle PRB, need to calculate each UE and correspond to the scheduling metric on an idle PRB, and with the preferential principle of maximum scheduling metric, this free time PRB is distributed to dispatching the UE of metric maximum by idle PRB, visible, the calculating of scheduling metric, whether accurately on distributing the accuracy of idle PRB also to have direct impact, has been equivalent to further improve the accuracy of distributing PRB therefore the precision of scheduling metric is obtained in raising.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with accompanying drawing, the embodiment of the present invention is described in detail.
Embodiment mono-
Refer to Fig. 1, the method flow diagram of its MIMO intra-mode handover method that is a kind of up channel of the present invention, the method is applied in the situation that be used alternatingly alone family MIMO mode SU-MIMO in the up channel of advanced long-term evolution system LTE-A and multi-user's MIMO mode MU-MIMO carries out transfer of data, comprise the following steps:
S101: obtain the order indication RI reporting;
S102: obtain the modulation coding mode MCS under the current RI of up channel;
The general up modulation coding mode that obtains correspondence that calculates according to the Signal to Interference plus Noise Ratio (Signal to Interference plus Noise Ratio, sinr) of the current up channel collecting, the method for obtaining belongs to prior art, repeats no more here.
S103: table look-up and obtain the bit number of each transport block transmission according to described MCS;
S104: calculate the current spectrum efficiency of up channel according to described bit number;
That is to say, the spectrum efficiency of determining can be according to the variation of current MCS and respective change, and can not look like a fixing value of the prior art, this according to the change of work at present parameter and the mode of corresponding adjustment spectrum efficiency has improved the adaptability of technical solution of the present invention greatly.
S105: while using MU-MIMO pattern as current up channel, if current spectrum efficiency is less than spectrum efficiency corresponding when the value of RI equals 1, switches to SU-MIMO pattern at up channel and carry out transfer of data;
SU-MIMO pattern specifically refers to that LTE-A system will support up channel to adopt the configuration of 2 or 4 transmit antennas.
S106: while using SU-MIMO pattern as current up channel, if current spectrum efficiency is greater than the value of spectrum efficiency corresponding when the value of RI equals 1 and current RI while being more than or equal to 1.5, switches to MU-MIMO pattern at up channel and carry out transfer of data.
And in the transmission of MU-MIMO pattern, LTE-A system sends to different users by a plurality of data flow in identical time/frequency resource, be that transmission between multi-user is mutually independently, and can share identical up time/frequency resource, the user that base station sends two single antenna according to the characteristic of space channel matches, be assigned in identical frequency resource, by transmit data for a plurality of users simultaneously, improved power system capacity.At this moment terminal is as transmitting terminal, and LTE-A system is as receiving terminal.In LTE-A system, uplink transmission mode 2 is supported the alone family transmission of maximum two streams, therefore can realize the dynamic switching of the multithread transmission of alone family and multi-user transmission.
That is to say, as long as when the value of RI equals 2, if current spectrum efficiency is less than spectrum efficiency corresponding when the value of RI equals 1, if the current use of up channel is SU-MIMO pattern, keep, if current use is MU-MIMO pattern, be switched to SU-MIMO pattern.In like manner, as long as when the value of RI equals 1, if current spectrum efficiency is greater than spectrum efficiency corresponding when the value of RI equals 1, keeps or be switched to MU-MIMO pattern.Certainly, determine to use the condition of a certain MIMO pattern, except RI need to meet certain numerical value, also have some other Rule of judgment, but owing to not relating to the claimed technical scheme of the present invention, therefore only doing below brief description, as shown in Figure 2.
MU-MIMO pattern (dicode word) is switched to the condition of SU-MIMO pattern (single codeword): (1) dicode word forbid that timer cuts out (2) if the spectrum efficiency of RI<=1.4 or dicode word lower than the spectrum efficiency (3) of single codeword if condition (2) meets, the time that dicode word is switched to the punishment timer of single codeword is set, if at punishment timer, open during this period of time in all meet (2) condition, switch, from dicode word, be switched to single codeword.After switching completes, open single codeword and forbid timer, within single codeword is forbidden time that timer opens, do not allow to switch again.
SU-MIMO pattern (single codeword) is switched to the condition of MU-MIMO pattern (dicode word): (1) single codeword forbid that timer cuts out (2) if the spectrum efficiency of RI>=1.5 and single codeword lower than the spectrum efficiency of dicode word, (3) if condition (2) meets, the time that single codeword is switched to the punishment timer of dicode word is set, if at punishment timer, open during this period of time in all meet (2) condition, switch, from single codeword, be switched to dicode word.After switching completes, open dicode word and forbid timer, within time that timer opens forbidden in dicode word, do not allow to switch again.
At the up channel of LTE-A system, when using SU-MIMO pattern or MU-MIMO pattern to carry out transfer of data, need further to calculate the scheduling metric of the UE that participates in transfer of data, so that enter the distribution of PRB when carrying out frequency domain dispatching.Calculate UE scheduling metric flow process as shown in Figure 3:
S301: obtain primary user's equipment UE;
S302: according to the service bearer ability of subband spectrum efficiency and main UE, calculate the scheduling metric of main UE;
In the subband spectrum efficiency here and step S104, determined spectrum efficiency has certain proportion relation, general relevant with the number of subband.
S303: be described main UE distribute data resource according to described scheduling metric.
For step, S302 it should be noted that, the method of calculating the scheduling metric of UE has multiple, but in prior art, do not have any account form both to consider the service bearer ability of UE, also consider the spectrum efficiency of up channel, below, will the improvement of max carrier to interference algorithm MaxC/I and equitable proportion algorithm PF be described mainly for technical solution of the present invention:
Use the max carrier to interference algorithm MaxC/I after improving, according to the service bearer capacity calculation scheduling metric of subband spectrum efficiency and main UE;
Described max carrier to interference algorithm calculates scheduling metric:
w
sch=w
ue-QoS*w
sb-se
Wherein, w
ue-QoSbe the service bearer ability of main UE, w
sb-sefor subband spectrum efficiency.
Use the equitable proportion algorithm PF after improving, according to the service bearer capacity calculation scheduling metric of subband spectrum efficiency and main UE;
Described equitable proportion algorithm calculates scheduling metric:
w
sch=w
ue-QoS*w
sb-se/w
ue-th
Wherein, w
ue-QoSbe the service bearer ability of main UE, w
sb-sefor subband spectrum efficiency, w
ue-thbe the service bearer amount of main UE to realize.
Visible, service bearer amount and the subband spectrum efficiency of considering UE all can exert an influence to scheduling metric, thus when scheduling metric, using service bearer amount and subband spectrum efficiency all as computing reference, improve existing max carrier to interference algorithm MaxC/I or equitable proportion algorithm PF, improved thus the accuracy of the scheduling metric obtaining.
For step, S303 it should be noted that, up channel from time domain scheduling proceed to frequency domain dispatching, the resource distribution of PRB will be started to carry out, and the Main Basis that carries out resource distribution be exactly each UE for the size of the scheduling metric of an idle PRB, and the scheduling metric of each UE obtains by the account form after improving in step S302 just.The calculating of scheduling metric, whether accurately on distributing the accuracy of idle PRB also to have direct impact, has been equivalent to further improve the accuracy of distributing PRB therefore the precision of scheduling metric is obtained in raising.Concrete allocation flow is as shown in Figure 4:
S401: obtain each main UE corresponding to the scheduling metric of an idle Physical Resource Block PRB;
S402: the main UE that described idle Physical Resource Block is distributed to the scheduling metric maximum of corresponding described PRB.
Actual divide timing also to need to consider some other factors carrying out resource, owing to not being that technical solution of the present invention is related, therefore will simply the process of concrete distribution PRB be described below.
Divide timing carrying out resource, need first to UE, to distribute control channel element (Control Channel Element, CCE), fruit is distributed CCE failure, and this UE is just under MU-MIMO pattern, this UE with and pairing UE use separately the space division multiplexing of one deck closed loop to redistribute resource.The preferential concrete execution mode of uplink resource allocating method of maximum scheduling metric is: obtain available free PRB, available free PRB is divided into a plurality of subbands (subband size is identical), because the spectrum efficiency of corresponding each subband of different UEs is different, therefore each UE correspondence is also different at the scheduling metric of each subband, each subband is descending according to corresponding metric, UE is sorted, this allocation of subbands is given UE that should subband metric maximum.Every group of PRB may be comprised of a plurality of subbands, needs to calculate the summation of the scheduling metric of these subbands that each UE correspondence comprises in this group PRB, and the summation of the scheduling metric of which UE is greatly just distributed to this UE this group PRB.If the PRB of two groups calculates the scheduling metric summation of each UE that the PRB of two groups is corresponding, two groups of PRB are distributed to the UE of metric maximum.
From the present embodiment, can find out, according to the modulation coding mode of Real-time Collection up channel, calculate corresponding spectrum efficiency, this mode of obtaining spectrum efficiency is more accurate, and can be according to the corresponding result of calculation of adjusting spectrum efficiency of the value of the MCS under actual operational environment, make thus according to the spectrum efficiency of obtaining in this way determine switch MIMO pattern time point more accurately and can the adjustment of correspondence along with the variation of the value of MCS lower in work at present environment.
Embodiment bis-
Corresponding with the MIMO intra-mode handover method of above-mentioned a kind of up channel, the embodiment of the present invention also provides a kind of MIMO intra-mode changing device of up channel.Refer to Fig. 5, one of its structure drawing of device that is the MIMO intra-mode changing device of a kind of up channel of the present invention, this device comprise obtain RI unit 501, obtain MCS unit 502, determine bit number unit 503, determine spectrum efficiency unit 504, first data transmission unit 505 and the second data transmission unit 506:
Obtain RI unit 501, for obtaining the order indication RI reporting;
Obtain MCS unit 502, for obtaining the modulation coding mode MCS under the current RI of up channel;
Determine bit number unit 503, for tabling look-up and obtain the bit number of each transport block transmission according to described MCS;
Determine spectrum efficiency unit 504, for calculate the current spectrum efficiency of up channel according to described bit number;
First data transmission unit 505, while being used for using MU-MIMO pattern as current up channel, if described definite spectrum efficiency unit 504 determined current spectrum efficiencies are less than spectrum efficiency corresponding when the value of RI equals 1, at up channel, switch to SU-MIMO pattern and carry out transfer of data;
The second data transmission unit 506, while being used for using SU-MIMO pattern as current up channel, if when the value that described definite spectrum efficiency unit 504 determined current spectrum efficiencies are greater than spectrum efficiency corresponding when the value of RI equals 1 and current RI is more than or equal to 1.5, switches to MU-MIMO pattern at up channel and carry out transfer of data.
Preferably, described first data transmission unit and the second data transmission unit, also comprise:
Obtain UE unit 601, for obtaining primary user's equipment UE;
Calculate scheduling metric unit 602, for according to the service bearer ability of subband spectrum efficiency and main UE, calculate the scheduling metric of main UE;
Data resource allocation units 603, for according to described scheduling metric being described main UE distribute data resource.
Preferably, described calculating scheduling metric unit 602, specifically for:
According to the service bearer ability of subband spectrum efficiency and main UE, use max carrier to interference algorithm MaxC/I to calculate scheduling metric;
Described max carrier to interference algorithm calculates scheduling metric:
w
sch=w
ue-QoS*w
sb-se
Wherein, w
ue-QoSbe the service bearer ability of main UE, w
sb-sefor subband spectrum efficiency.
Preferably, described calculating scheduling metric unit 602, specifically for:
According to the service bearer ability usage ratio fair algorithm PF of subband spectrum efficiency and main UE, calculate scheduling metric;
Described equitable proportion algorithm calculates scheduling metric:
w
sch=w
ue-QoS*w
sb-se/w
ue-th
Wherein, w
ue-QoSbe the service bearer ability of main UE, w
sb-sefor subband spectrum efficiency, w
ue-thbe the service bearer amount of main UE to realize.
Preferably, described data resource allocation units 603, specifically comprise:
Obtain scheduling metric subelement 6031, for obtaining each main UE corresponding to the scheduling metric of an idle Physical Resource Block PRB;
Idle PRB distributes subelement 6032, for described idle PRB being distributed to the main UE of the scheduling metric maximum of corresponding described idle Physical Resource Block.
From the present embodiment, can find out, according to the modulation coding mode of Real-time Collection up channel, calculate corresponding spectrum efficiency, this mode of obtaining spectrum efficiency is more accurate, and can be according to the corresponding result of calculation of adjusting spectrum efficiency of the value of the MCS under actual operational environment, make thus according to the spectrum efficiency of obtaining in this way calculate switch MIMO pattern time point more accurately and can the adjustment of correspondence along with the variation of the value of MCS lower in work at present environment.
It should be noted that, one of ordinary skill in the art will appreciate that all or part of flow process realizing in above-described embodiment method, to come the hardware that instruction is relevant to complete by computer program, described program can be stored in a computer read/write memory medium, this program, when carrying out, can comprise as the flow process of the embodiment of above-mentioned each side method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory, ROM) or random store-memory body (Random Access Memory, RAM) etc.
Above the MIMO intra-mode handover method and apparatus of a kind of up channel provided by the present invention is described in detail, applied specific embodiment herein principle of the present invention and execution mode are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof; , for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention meanwhile.
Claims (10)
1. the MIMO intra-mode handover method of a up channel, it is characterized in that, in the up channel of advanced long-term evolution system LTE-A, be used alternatingly alone family MIMO mode SU-MIMO and multi-user's MIMO mode MU-MIMO and carry out transfer of data, comprising:
Obtain the order indication RI reporting;
Obtain the modulation coding mode MCS under the current RI of up channel;
According to described MCS, table look-up and obtain the bit number of each transport block transmission;
According to described bit number, calculate the current spectrum efficiency of up channel;
While using MU-MIMO pattern as current up channel, if current spectrum efficiency is less than spectrum efficiency corresponding when the value of RI equals 1, at up channel, switches to SU-MIMO pattern and carry out transfer of data;
While using SU-MIMO pattern as current up channel, if current spectrum efficiency is greater than the value of spectrum efficiency corresponding when the value of RI equals 1 and current RI while being more than or equal to 1.5, at up channel, switches to MU-MIMO pattern and carry out transfer of data.
2. method according to claim 1, is characterized in that, when up channel carries out transfer of data, also comprises:
Obtain primary user's equipment UE;
According to the service bearer ability of subband spectrum efficiency and main UE, calculate the scheduling metric of main UE;
According to described scheduling metric, it is described main UE distribute data resource.
3. method according to claim 2, is characterized in that, described according to the service bearer ability of subband spectrum efficiency and main UE, calculates the scheduling metric of main UE, specifically comprises:
According to the service bearer ability of subband spectrum efficiency and main UE, use max carrier to interference algorithm MaxC/I to calculate scheduling metric;
Described max carrier to interference algorithm calculates scheduling metric:
w
sch=w
ue-QoS*w
sb-se
Wherein, w
ue-QoSbe the service bearer ability of main UE, w
sb-sefor subband spectrum efficiency.
4. method according to claim 2, is characterized in that, described according to the service bearer ability of subband spectrum efficiency and main UE, calculates the scheduling metric of main UE, specifically comprises:
According to the service bearer ability usage ratio fair algorithm PF of subband spectrum efficiency and main UE, calculate scheduling metric;
Described equitable proportion algorithm calculates scheduling metric:
w
sch=w
ue-QoS*w
sb-se/w
ue-th
Wherein, w
ue-QoSbe the service bearer ability of main UE, w
sb-sefor subband spectrum efficiency, w
ue-thbe the service bearer amount of main UE to realize.
5. method according to claim 2, is characterized in that, described is described main UE distribute data resource according to described scheduling metric, specifically comprises:
Obtain each main UE corresponding to the scheduling metric of an idle Physical Resource Block PRB;
Described idle PRB is distributed to the main UE of the scheduling metric maximum of corresponding described idle Physical Resource Block.
6. the MIMO intra-mode changing device of a up channel, it is characterized in that, in the up channel of advanced long-term evolution system LTE-A, be used alternatingly alone family MIMO mode SU-MIMO and multi-user's MIMO mode MU-MIMO and carry out transfer of data, comprising:
Obtain RI unit, for obtaining the order indication RI reporting;
Obtain MCS unit, for obtaining the modulation coding mode MCS under the current RI of up channel;
Determine bit number unit, for tabling look-up and obtain the bit number of each transport block transmission according to described MCS;
Determine spectrum efficiency unit, for calculate the current spectrum efficiency of up channel according to described bit number;
First data transmission unit, while being used for using MU-MIMO pattern as current up channel, if the determined current spectrum efficiency in described definite spectrum efficiency unit is less than spectrum efficiency corresponding when the value of RI equals 1, at up channel, switches to SU-MIMO pattern and carry out transfer of data;
The second data transmission unit, while being used for using SU-MIMO pattern as current up channel, if when the value that the determined current spectrum efficiency in described definite spectrum efficiency unit is greater than spectrum efficiency corresponding when the value of RI equals 1 and current RI is more than or equal to 1.5, switches to MU-MIMO pattern at up channel and carry out transfer of data.
7. device according to claim 6, is characterized in that, described first data transmission unit and the second data transmission unit, also comprise:
Obtain UE unit, for obtaining primary user's equipment UE;
Calculate scheduling metric unit, for according to the service bearer ability of subband spectrum efficiency and main UE, calculate the scheduling metric of main UE;
Data resource allocation units, for according to described scheduling metric being described main UE distribute data resource.
8. device according to claim 7, is characterized in that, described calculating scheduling metric unit, specifically for:
According to the service bearer ability of subband spectrum efficiency and main UE, use max carrier to interference algorithm MaxC/I to calculate scheduling metric;
Described max carrier to interference algorithm calculates scheduling metric:
w
sch=w
ue-QoS*w
sb-se
Wherein, w
ue-QoSbe the service bearer ability of main UE, w
sb-sefor subband spectrum efficiency.
9. device according to claim 7, is characterized in that, described calculating scheduling metric unit, specifically for:
According to the service bearer ability usage ratio fair algorithm PF of subband spectrum efficiency and main UE, calculate scheduling metric;
Described equitable proportion algorithm calculates scheduling metric:
w
sch=w
ue-QoS*w
sb-se/w
ue-th
Wherein, w
ue-QoSbe the service bearer ability of main UE, w
sb-sefor subband spectrum efficiency, w
ue-thbe the service bearer amount of main UE to realize.
10. device according to claim 7, is characterized in that, described data resource allocation units, specifically comprise:
Obtain scheduling metric subelement, for obtaining each main UE corresponding to the scheduling metric of an idle Physical Resource Block PRB;
Idle PRB distributes subelement, for described idle PRB being distributed to the main UE of the scheduling metric maximum of corresponding described idle Physical Resource Block.
Priority Applications (1)
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