CN101394208B - Indicating power distributing method, system, base station and customer terminal of MIMO system - Google Patents
Indicating power distributing method, system, base station and customer terminal of MIMO system Download PDFInfo
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- CN101394208B CN101394208B CN 200810224036 CN200810224036A CN101394208B CN 101394208 B CN101394208 B CN 101394208B CN 200810224036 CN200810224036 CN 200810224036 CN 200810224036 A CN200810224036 A CN 200810224036A CN 101394208 B CN101394208 B CN 101394208B
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Abstract
The invention provides a method, a system, a base station, and a user terminal to distribute an indicated power of a multi-input multi-output control system, wherein, the method comprises the following steps: a power distribution information table which is shared by users and the base station are preset in the system; a power distribution value of each user in the system and an actual down stream rank value which is shared by the base station and the users are acquired; a reference power value which is matched with the power distribution value in the power distribution information table is searched by the base station according to the power distribution value and the actual downstream rank value; a control indicated message which corresponds to the matched reference power value is sent by the station to the corresponding user; and the corresponding reference power value is acquired through the way of searching in the power distribution table according to the control indicated message and the actual downstream rank value. The invention has the advantage of sending a power indication which is not equally distributed to the each user. Furthermore, compared with a system which equally distributes the power, the invention gains greater performance gain.
Description
Technical field
The present invention relates to communication technical field, relate in particular to indicating power distributing method, system, base station, the user terminal of multi-input multi-output system.
Background technology
Multiple-input and multiple-output (MIMO; Multiple-Input Multiple-Output) wireless communication technology is through dispose many antennas at transmitting terminal and receiving terminal simultaneously; Can be under the situation that does not increase system bandwidth the spectrum efficiency of elevator system, become the key technology that realizes the high-rate wireless transmission.In cellular radio Communication and wireless local area network (WLAN) system, the base station needs simultaneously and a plurality of telex network, Here it is so-called multiuser mimo system (MU-MIMO, Multi-user Multiple-input Multiple-output).In this system, through suitable user is dispatched, power division can make full use of the potential multi-user diversity of system, improves the performance gain of system significantly.
At present; For the multi-subscriber dispatching in the MU-MIMO system, power division a lot of methods is arranged, still, these multi-subscriber dispatchings, power distribution method are applied in the actual communication systems; Also relate to a problem: the indication of power distribution result; In other words, that is, how the result with power division tells the user.
In the standard such as the communication system of 3GPP LTE, the multipotency of MU-MIMO is dispatched two data flow simultaneously, therefore, has two users can carry out spatial reuse (because each user can only be transmitted a data flow among the LTE regulation MU-MIMO) at most.For each user's scheduling result, the result and the corresponding control information of power division, (PDCCH, Physical DownlinkControl CHannel) indicates through Physical Downlink Control Channel.Being used for indicating the user's that MU-MIMO is dispatched to PDCCH is descending control indication (DCI; Downlink control indicator); In this control indication, the one digit number certificate is set, be used to indicate current have a user to be scheduled for still two users are scheduled for.
For example, when this position is 0, represent that two users are scheduled for, so each user's power is total transmitted power 1/2, just compares have-decay of 3dB with single user's transmitted power; When this position was 1, expression had only a user to be scheduled for, and it is total transmitted power that this user who is dispatched to obtains.
That is to say that in existing communication system such as 3GPP LTE, the power between different user, different data streams is mean allocation, promptly
P
s＝P
Tx/N
P wherein
sBe the corresponding transmitted power of each data flow, P
TxBe total transmitted power, N can get two values: 1 or 2 for the quantity of the data flow of the MU-MIMO of participation spatial reuse.The advantage of this method is very simple, no matter is at transmitting terminal, or at receiving terminal, all need not to consider signal and disturb between power whether identical.But, the shortcoming of mean allocation power also clearly: the degree of freedom that can not bring through the power adjustment that utilizes fully between the data flow obtains the bigger performance gain of system.
In 3GPP LTE-Advanced system, maximum users multiplexing number possibly reach 4, and promptly on each running time-frequency resource thread, maximum demand transmits 4 data flow accordingly.When carrying out the power indication based on the power averaging allocation result of utilizing among the current 3GPP LTE, still only can realize average power allocation, same, system can not make full use of the degree of freedom that the power adjustment between the data flow brings, and obtains bigger performance gain.
In view of this; Need the urgent technical problem that solves of those skilled in the art to be: how in the MU-MIMO system, the power indication of non-mean allocation is sent to each user who calls, thereby; Compare with the system of average power allocation, can obtain bigger performance gain.
Summary of the invention
Technical problem to be solved by this invention is: the method that is used to indicate power division, system, base station, user terminal that a kind of multi-input multi-output system is provided; Can be in the MU-MIMO system; The power indication of non-mean allocation is sent to each user who calls; Thereby, compare with the system of average power allocation, can obtain bigger performance gain.
In order to address the above problem; The invention discloses a kind of indicating power distributing method of multiuser mimo system; Comprise the steps: to preset the power allocation information table that share base station and user in the said system, said power allocation information table comprises: row rank value under a plurality of references, a plurality of reference control indication information and with each said reference under row rank value and the corresponding reference power value of each said reference control indication information; Obtain each user in the said system the power division value and, the actual downstream order value that base station and each user share; The reference power value with said power division value coupling is searched according to said power division value and actual downstream order value in the base station in said power allocation information table; The pairing control indication information of the reference power value of said coupling is sent to relative users; The user searches in the power allocation information table and obtains corresponding reference power value according to said control indication information and actual downstream order value.
Preferably, said power division value obtains the channel quality indication that comprises the steps: to obtain each user feedback in the said system; Carry out user's scheduling according to said channel quality indication, and carry out power division; Quantize said power distribution result.
Preferably, said actual downstream order value presets the also following row rank value of informing base station for the user by radio resource control signaling.
Preferably, said actual downstream order value obtain also can for: user's actual downstream order value is preset and notified in the base station.
The invention also discloses a kind of method that is used to indicate power division of multiuser mimo system; Comprise the steps: to preset the power allocation information table that share base station and user in the said system, said power allocation information table comprises: row rank value under a plurality of references, a plurality of reference control indication information and with each said reference under row rank value and the common corresponding reference performance number of each said reference control indication information; Obtain the user who is dispatched in the said system, and, the actual downstream order value that base station and the said user who is dispatched to share; According to actual downstream order value pairing a plurality of reference power value in said power allocation information table, the said user who is dispatched to is carried out the combination of power division; Calculate said power division combination overall performance gain and select the combination of the maximum power division of overall performance gain; According to said power allocation information table, confirm in this combination the pairing said reference control indication information of the said user who is dispatched to; Said reference control indication information is sent to relative users; The user searches in the power allocation information table and obtains corresponding reference power value according to said control indication information and actual downstream order value.
Preferably, obtaining the user who is dispatched in the said system specifically comprises: the channel quality indication of obtaining each user feedback in the said system; Obtain the user who is dispatched in the said system according to said channel quality indication.
Preferably, said actual downstream order value presets the also following row rank value of informing base station for the user by radio resource control signaling.
Preferably, stating obtaining of actual downstream order value is specially: user's actual downstream order value is preset and notified in the base station.
On the other hand; The invention also discloses a kind of system of indicated horsepower distribution of multiuser mimo system, said system comprises: power allocation information table preset unit, power division value acquiring unit, actual downstream order value acquiring unit, power allocation information are searched unit, reference control indication information transmitting element and control indication information resolution unit.
Wherein, Power allocation information table preset unit is used for presetting the power allocation information table that said system base station and user share, and said power allocation information table comprises: row rank value under a plurality of references, a plurality of reference control indication information and with each said reference under row rank value and the corresponding reference power value of each said reference control indication information; Power division value acquiring unit is used for obtaining said each user's of system power division value; Actual downstream order value acquiring unit is used to obtain the actual downstream order value that base station and each user share; Power allocation information is searched the unit and is used for according to said power division value and actual downstream order value, in said power allocation information table, searches the reference power value with said power division value coupling; Reference control indication information transmitting element is used for the pairing reference control indication information of the reference power value of said coupling is sent to relative users; Control indication information resolution unit is used for according to said reference control indication information and actual downstream order value, in the power allocation information table, searches and obtains corresponding reference power value.
Preferably, said power division value acquiring unit comprises that channel quality indication obtains subelement, first user's scheduling sublayer unit, power distribution result and quantize subelement.
Wherein, the channel quality indication that subelement is used for obtaining said each user's of system feedback is obtained in channel quality indication; First user's scheduling sublayer unit is used for carrying out user's scheduling according to said channel quality indication, and carries out power division; Power distribution result quantizes subelement and is used to quantize said power distribution result.
Preferably, power allocation information is searched the unit and is controlled the indication information transmitting element and is positioned at said base station end; Said actual downstream order value acquiring unit and control indication information resolution unit are positioned at said user side; And; Said actual downstream order value acquiring unit comprises that first presets subelement, first notification unit, and first presets subelement is used for the user and presets said actual downstream order value by radio resource control signaling; First notification unit is used for the user with said actual downstream order value informing base station; Said power allocation information table preset unit lays respectively at said base station end and said user side.
Preferably; Said power division value acquiring unit, actual downstream order value acquiring unit, power allocation information searches the unit and reference control indication information transmitting element is positioned at said base station end; And said actual downstream order value acquiring unit comprises that second presets subelement, the second notice subelement, wherein; Second presets subelement, is used for said base station and presets actual downstream order value; The second notice subelement is used for the base station and notifies the user with said actual downstream order value; And control indication information resolution unit is positioned at said user side, and said power allocation information table preset unit lays respectively at said base station end and said user side.
The invention also discloses a kind of system of indicated horsepower distribution of multiuser mimo system, said system comprises: power allocation information table preset unit, user's scheduling unit, actual downstream order value acquiring unit, user's assembled unit, overall performance gain calculating unit, reference control indication information acquiring unit, reference control indication information transmitting element, control indication information resolution unit.
Wherein, Power allocation information table preset unit; Be used for presetting the power allocation information table that said system base station and user share, said power allocation information table comprises: row rank value under a plurality of references, a plurality of reference control indication information and with each said reference under row rank value and the corresponding reference power value of each said reference control indication information; User's scheduling unit is used for obtaining the user that said system is dispatched to; Actual downstream order value acquiring unit is used to obtain the actual downstream order value that base station and the said user who is dispatched to share; User's assembled unit is used for according to actual downstream order value in the pairing a plurality of reference power value of said power allocation information table the said user who is dispatched to being carried out the combination of power division; Overall performance gain calculating unit is used to calculate the overall performance gain of the combination of said power division, and selects the combination of the maximum power division of overall performance gain; Reference control indication information acquiring unit is used for confirming in the combination of this power division the pairing reference control indication information of the said user who is dispatched to according to said power allocation information table; Reference control indication information transmitting element is used for said reference control indication information is sent to relative users; Control indication information resolution unit is used for according to said control indication information and actual downstream order value, in said power allocation information table, searches and obtains corresponding reference power value.
Preferably, said user's scheduling unit comprises: subelement and second user's scheduling sublayer unit are obtained in the channel quality indication, and wherein, the channel quality indication that subelement is used for obtaining each user feedback of said system is obtained in the channel quality indication; Second user's scheduling sublayer unit is used for obtaining the user that said system is dispatched to according to said channel quality indication.
Preferably, said user's scheduling unit, user's assembled unit, overall performance gain calculating unit, reference control indication information acquiring unit, reference control indication information transmitting element are positioned at said base station end; Said actual downstream order value acquiring unit, and control indication information resolution unit is positioned at said user side; And said actual downstream order value acquiring unit comprises: first presets subelement, first notification unit, and wherein, first presets subelement, is used for the user and presets said actual downstream order value by radio resource control signaling; First notification unit is used for the user with said actual downstream order value informing base station; And said power allocation information table preset unit lays respectively at said base station end and said user side.
Preferably, said user's scheduling unit, actual downstream order value acquiring unit, user's assembled unit, overall performance gain calculating unit, reference control indication information acquiring unit, reference control indication information transmitting element are positioned at said base station end; Said actual downstream order value acquiring unit comprises: second presets subelement, the second notice subelement, and wherein, second presets subelement is used for said base station and presets actual downstream order value; The second notice subelement is used for the base station and notifies the user with said actual downstream order value; Said control indication information resolution unit is positioned at said user side; And said power allocation information table preset unit lays respectively at said base station end and said user side.
The invention also discloses a kind of base station of multiuser mimo system, said base station comprises: power allocation information table preset unit, power division value acquiring unit, base station side actual downstream order value acquiring unit, power allocation information are searched unit, reference control indication information transmitting element.
Wherein, Power allocation information table preset unit is used to preset the power allocation information table that base station and user share; Said power allocation information table comprises, row rank value under a plurality of references, a plurality of reference control indication information and with each said reference under row rank value and the corresponding reference power value of each said reference control indication information; Power division value acquiring unit is used for obtaining said each user's of system power division value; Base station side actual downstream order value acquiring unit is used to obtain the actual downstream order value that base station and each user share, and said actual downstream order value is sent to corresponding user; Perhaps, be used to receive the actual downstream order value that the user sends; Power allocation information is searched the unit, is used for according to said power division value and actual downstream order value, in said power allocation information table, searches the reference power value with said power division value coupling; Reference control indication information transmitting element is used for the pairing reference control indication information of the reference power value of said coupling is sent to relative users.
The invention also discloses a kind of base station of multiuser mimo system, said base station comprises: power allocation information table preset unit, user's scheduling unit, base station side actual downstream order value acquiring unit, user's assembled unit, overall performance gain calculating unit, reference control indication information acquiring unit, reference control indication information transmitting element.
Wherein, Power allocation information table preset unit is used to preset the power allocation information table that base station and user share; Said power allocation information table comprises, row rank value under a plurality of references, a plurality of reference control indication information and with each said reference under row rank value and the corresponding reference power value of each said reference control indication information; User's scheduling unit is used for obtaining the user that said system is dispatched to; Base station side actual downstream order value acquiring unit is used to obtain actual downstream order value that base station and the said user who is dispatched to share and said actual downstream order value is sent to corresponding user; Perhaps, be used to receive the actual downstream order value that the user sends; User's assembled unit is used for according to actual downstream order value in the pairing a plurality of reference power value of said power allocation information table the said user who is dispatched to being carried out the combination of power division; Overall performance gain calculating unit is used to calculate the overall performance gain of the combination of said power division, and selects the combination of the maximum power division of overall performance gain; Reference control indication information acquiring unit is used for confirming in the combination of this power division the pairing reference control indication information of the said user who is dispatched to according to said power allocation information table; Reference control indication information transmitting element is used for said reference control indication information is sent to relative users.
The invention also discloses a kind of user terminal of multiuser mimo system, said user terminal comprises: power allocation information table preset unit, user side actual downstream order value acquiring unit, control indication information resolution unit.
Wherein, user side actual downstream order value acquiring unit is used to obtain actual downstream order value that base station and the said user who is dispatched to share and said actual downstream order value is sent to relevant base station; Perhaps, be used to receive the actual downstream order value that send the base station; Control indication information resolution unit is used for reference control indication information and actual downstream order value according to the base station transmission, in the power allocation information table, searches and obtains corresponding reference power value; The reference control indication information that send said base station does, according to power division value and actual downstream order value, and the pairing control indication information of reference power value that in said power allocation information table, finds, mate with said power division value; Said power division value is each user's in the system that the base station obtains, a said power division value.
The invention also discloses a kind of user terminal of multiuser mimo system, said user terminal comprises: power allocation information table preset unit, user side actual downstream order value acquiring unit, control indication information resolution unit.
Wherein, Power allocation information table preset unit is used to preset the power allocation information table that base station and user share; Said power allocation information table comprises, row rank value under a plurality of references, a plurality of reference control indication information and with each said reference under row rank value and the corresponding reference power value of each said reference control indication information; User side actual downstream order value acquiring unit is used to obtain actual downstream order value that base station and the said user who is dispatched to share and said actual downstream order value is sent to relevant base station; Perhaps, be used to receive the actual downstream order value that send the base station; Control indication information resolution unit is used for reference control indication information and actual downstream order value according to the base station transmission, in the power allocation information table, searches and obtains corresponding reference power value; The reference control indication information that send said base station is: in the combination according to the maximum power division of overall performance gain, and the reference power value that each user got control indication information determined, correspondence in said power allocation information table; Being combined as of the power division that said overall performance gain is maximum: the base station is according to actual downstream order value pairing a plurality of reference power value in said power allocation information table; The user who is dispatched to is carried out the combination of power division; Calculate the overall performance gain of the combination of said power division, and then obtain the combination of the maximum power division of overall performance gain.
Compared with prior art; The present invention has the following advantages: when the power distribution method in the existing 3GPP LTE system is transplanted to 3GPP LTE-Advanced system; Only can realize the problem that power averaging distributes; Through according to power allocation information table, following information such as row rank value; Each user's that the base station obtained power division value and the data in the power allocation information table are compared, search the reference power value that obtains mating, and the pairing control indication information of the reference power value of this coupling is sent to user terminal by the base station; User terminal is resolved the control indication information that receives according to power allocation information table, following row rank value, and then obtains the power that the base station is each user's distribution.Because the reference power value in this power allocation information table is not the performance number of mean allocation, therefore, in the MU-MIMO system; Can the power indication of non-mean allocation be sent to each user who calls; Thereby, compare with the system of average power allocation, can obtain bigger performance gain.
Description of drawings
Fig. 1 is the flow chart of steps of the method embodiment that distributes of the indicated horsepower of the MU-MIMO system according to the present invention;
Fig. 2 is in method shown in Figure 1, the flow chart of steps of power division value-acquiring method embodiment;
Fig. 3 is the flow chart of steps of the another kind of method embodiment that distributes of the indicated horsepower of the MU-MIMO system according to the present invention;
Fig. 4 is in the method shown in Figure 3, obtains the flow chart of steps of the user embodiment that is dispatched in the system;
Fig. 5 is the structural representation of the indicated horsepower of the MU-MIMO system according to the present invention system embodiment of distributing;
Fig. 6 is in the indicated horsepower of the MU-MIMO system according to the present invention system embodiment of distributing, the structural representation of power division value acquiring unit;
Fig. 7 is in the indicated horsepower of the MU-MIMO system according to the present invention system embodiment of distributing, the structural representation of the first actual downstream order value acquiring unit;
Fig. 8 is in the indicated horsepower of the MU-MIMO system according to the present invention system embodiment of distributing, the structural representation of the another kind of first actual downstream order value acquiring unit;
Fig. 9 is the structural representation of the another kind of embodiment of system that distributes of the indicated horsepower of the MU-MIMO system according to the present invention;
Figure 10 is in the indicated horsepower of the MU-MIMO system according to the present invention system embodiment of distributing, the structural representation of user's scheduling unit;
Figure 11 is in the indicated horsepower of the MU-MIMO system according to the present invention system embodiment of distributing, the structural representation of actual downstream order value acquiring unit;
Figure 12 is in the indicated horsepower of the MU-MIMO system according to the present invention system embodiment of distributing, the another kind of structural representation of actual downstream order value acquiring unit;
Figure 13 is the structural representation of the base station embodiment of the MU-MIMO system according to the present invention;
Figure 14 is according among Figure 13, the structural representation of the embodiment of the user terminal under the base station covers;
Figure 15 is the structural representation of the another kind of embodiment in base station of the MU-MIMO system according to the present invention.
Embodiment
For make above-mentioned purpose of the present invention, feature and advantage can be more obviously understandable, below in conjunction with accompanying drawing and embodiment the present invention done further detailed explanation.
Core concept of the present invention is: through according to power allocation information table, following information such as row rank value; Each user's that the base station obtained power division value and the data in the power allocation information table are compared; Search the reference power value that obtains mating, and the pairing control indication information of the reference power value of this coupling is sent to user terminal by the base station; User terminal is resolved the control indication information that receives according to power allocation information table, following row rank value, and then obtains the power that the base station is each user's distribution.
With reference to Fig. 1, show the flow chart of steps of the method embodiment that the indicated horsepower of the MU-MIMO system according to the present invention distributes, comprise the steps:
Step 101: the power allocation information table that base station and user share in the preset system, the power allocation information table comprises: row rank value under a plurality of references, a plurality of reference control indication information and with each with reference to row rank value and the corresponding reference power value of each reference control indication information down;
Step 102: obtain each user in the system the power division value and, the actual downstream order value that base station and each user share;
Step 103: the reference power value with power division value coupling is searched according to power division value and actual downstream order value in the base station in the power allocation information table;
Step 104: the pairing control indication information of reference power value of coupling is sent to relative users;
Step 105: the user searches in the power allocation information table and obtains corresponding reference power value according to control indication information and actual downstream order value.
Wherein, in step 101, the power allocation information table comprises: row rank value under a plurality of references, a plurality of reference control indication information and with each with reference to row rank value and the corresponding reference power value of each reference control indication information down.
For the actual downstream order value in step 102, to compare with the cycle of transfer of data, it is a relatively long parameter of a lasting cycle; Promptly this time row rank value is for the user; In long period of time, will remain unchanged, can be as not controlling indication information, each subframe can both change.This time row rank value can be that all users in the whole sub-district under the base station covers are identical, also can be that different users has different parameters in the sub-district.
In step 103; " coupling " can be interpreted as " the most approaching "; That is to say that the reference power value the most approaching with the power division value searched according to power division value and actual downstream order value in the base station in the power allocation information table; In other words, find the absolute value minimum of the difference of reference power value and power division value.
Preferably, actual downstream order value is to preset this parameter by the user according to RRC (Radio Resource control, radio resourcecontrol) signaling, and, preset this parameter after, by the user notification base station.
Certainly; This actual downstream order value is not limited to specify this parameter through radio resource control signaling, also is fine through other high-level signaling, such as also being can be MAC (medium access control; MediaAccess Control) signaling is enumerated at this no longer one by one.
In addition, this actual downstream order value can also be in the following manner, and shared by user and base station: preset this parameter by the base station, then, the user is notified with this parameter in the base station.
With reference to figure 2, show in method shown in Figure 1, the flow chart of steps of power division value-acquiring method embodiment in the step 102 comprises:
Step 201: the channel quality indication of obtaining each user feedback in the said system;
Wherein, channel quality can obtain through feedback channel from user side, for example, and frequency division multiplexing duplex (FDD, frequency division duplex) system; Also can directly carry out channel estimating through up pilot frequency information, for example, time division multiplexing duplex (TDD:time division duplex) system.
Step 202: carry out user's scheduling according to said channel quality indication, and carry out power division;
Specifically, the base station is carried out multiuser MIMO and is called according to the channel quality indication (CQI:channel qualityindicator) that gets access to, and in this step, also might comprise processing such as CQI renewal.In this step, also will carry out power division, and the power division here can be utilized existing any power distribution method to the user who is dispatched to.
Step 203: quantize said power distribution result.
The reason that why quantizes is: the quantity of the reference power value in the above-mentioned power information allocation table is limited.
For one thing, in MU-MIMO, suppose to have three users, user 1, user 2 and user 3, user 1 order value is 1, user 2 order value is 2, user 3 order value is 1.
At current time, base station scheduling to two user: user 1 and user 2, and according to existing power distribution method, the result of the power division after obtaining quantizing is: user 1 minute power 0.3P, wherein P is total transmitted power, user 2 minutes power 0.7P.
Then according to power allocation information table as shown in table 1, the base station is the row of 1 correspondence for user 1 from the order value, and selection and the reference power value that 0.3P matees are 1/3P, and corresponding control indication information is " 10 "; The base station for user 2 from being the 2 corresponding row from the order value, select the reference power value with the 0.7P coupling, be 3/4P, corresponding control indication information is " 11 ".
Then; The base station sends to each user among the MU-MIMO respectively with control indication informations such as " 10 ", " 11 ", and user 1 is according to its control indication information " 10 ", from the power allocation information table shown in the table 1; Order value 1 in conjunction with himself searches the power 1/3P by base station assigns; In like manner, user 2 is according to its control indication information " 11 ", and from the power allocation information table shown in the table 1, the order value 2 in conjunction with himself searches the power 3/4P by base station assigns.
Table 1: power allocation information table
With reference to Fig. 3, Fig. 3 shows the flow chart of steps of the another kind of method embodiment that the indicated horsepower of the MU-MIMO system according to the present invention distributes, comprises the steps:
Step 301: preset the power allocation information table that share base station and user in the said system;
Step 302: obtain the user who is dispatched in the said system, and, the actual downstream order value that base station and the said user who is dispatched to share;
Step 303:, the said user who is dispatched to is carried out the combination of power division according to actual downstream order value pairing a plurality of reference power value in said power allocation information table;
Step 304: calculate said power division combination overall performance gain and select the combination of the maximum power division of overall performance gain;
Step 305:, confirm in this combination the pairing said reference control indication information of the said user who is dispatched to according to said power allocation information table;
Step 306: said reference control indication information is sent to relative users;
Step 307: the user searches in the power allocation information table and obtains corresponding reference power value according to said control indication information and actual downstream order value.
Wherein, in step 301, said power allocation information table comprises: row rank value under a plurality of references, a plurality of reference control indication information and with each said reference under row rank value and the common corresponding reference performance number of each said reference control indication information.
With reference to figure 4, show in the method shown in Figure 3, obtain the flow chart of steps of the user embodiment that is dispatched in the system in the step 302, comprise the steps:
Step 401: the channel quality indication of obtaining each user feedback in the said system;
Step 402: obtain the user who is dispatched in the said system according to said channel quality indication.
Preferably, actual downstream order value is to preset this parameter by the user according to RRC (Radio Resource control, radio resourcecontrol) signaling, and, preset this parameter after, by the user notification base station.
Certainly; This actual downstream order value is not limited to specify through radio resource control signaling this parameter, also is fine through other high-level signaling, such as also being can be MAC (medium access control; MediaAccess Control) signaling is enumerated at this no longer one by one.
In addition, this actual downstream order value can also be in the following manner, and shared by user and base station: preset this parameter by the base station, then, the user is notified with this parameter in the base station.
That is to say that the present invention is not limited to the base station and the user is this actual downstream order value how to share to, and this actual downstream order value should be a parameter that changes when long.
With reference to Fig. 5, show the structural representation of the system embodiment that the indicated horsepower of the MU-MIMO system according to the present invention distributes, this system comprises:
Power allocation information table preset unit 501: be used for presetting the power allocation information table that said system base station and user share, said power allocation information table comprises: row rank value under a plurality of references, a plurality of reference control indication information and with each said reference under row rank value and the corresponding reference power value of each said reference control indication information;
Power division value acquiring unit 502 is used for obtaining said each user's of system power division value;
Actual downstream order value acquiring unit 503 is used to obtain the actual downstream order value that base station and each user share;
Power allocation information is searched unit 504, is used for according to said power division value and actual downstream order value, in said power allocation information table, searches the reference power value with said power division value coupling;
Reference control indication information transmitting element 505 is used for the pairing reference control indication information of the reference power value of said coupling is sent to relative users;
Control indication information resolution unit 506 is used for according to said reference control indication information and actual downstream order value, in the power allocation information table, searches and obtains corresponding reference power value.
Wherein, Power allocation information table preset unit 501 is user side and base station end Sharing Information, thus in user side and base station, all should be provided with this unit, in remaining construction unit; Power division value acquiring unit 502, power allocation information are searched unit 504, reference control indication information transmitting element 505 should be positioned at base station segment; Control indication information resolution unit 506 should be positioned at user side, and actual downstream order value acquiring unit 503 can be positioned at base station end, also can be positioned at user side.
With reference to Fig. 6, in the system embodiment that the indicated horsepower of MU-MIMO system distributes according to the present invention, the structural representation of power division value acquiring unit comprises:
First user's scheduling sublayer unit 602 is used for carrying out user's scheduling according to said channel quality indication, and carries out power division.
Power distribution result quantizes subelement 603, is used to quantize said power distribution result.
With reference to Fig. 7, show in the system embodiment that the indicated horsepower of the MU-MIMO system according to the present invention distributes, the structural representation of actual downstream order value acquiring unit comprises:
First presets subelement 701, is used for the user and presets said actual downstream order value by radio resource control signaling;
Obviously, the actual downstream order value acquiring unit that has a said structure is positioned at user side.
In addition, the structure that actual downstream order value acquiring unit also can be as shown in Figure 8 comprises:
Second presets subelement 801, is used for said base station and presets actual downstream order value;
The second notice subelement 802 is used for the base station and notifies the user with said actual downstream order value.
Obviously, the actual downstream order value acquiring unit that has a said structure is positioned at base station end.
With reference to Fig. 9, show the structural representation of the another kind of embodiment of system that the indicated horsepower of the MU-MIMO system according to the present invention distributes, comprising:
Power allocation information table preset unit 901; Be used for presetting the power allocation information table that said system base station and user share, said power allocation information table comprises: row rank value under a plurality of references, a plurality of reference control indication information and with each said reference under row rank value and the corresponding reference power value of each said reference control indication information;
User's scheduling unit 902 is used for obtaining the user that said system is dispatched to;
Actual downstream order value acquiring unit 903 is used to obtain the actual downstream order value that base station and the said user who is dispatched to share;
User's assembled unit 904 is used for according to actual downstream order value in the pairing a plurality of reference power value of said power allocation information table the said user who is dispatched to being carried out the combination of power division;
Overall performance gain calculating unit 905 is used to calculate the overall performance gain of the combination of said power division, and selects the combination of the maximum power division of overall performance gain;
Reference control indication information acquiring unit 906 is used for confirming in the combination of this power division the pairing reference control indication information of the said user who is dispatched to according to said power allocation information table;
Reference control indication information transmitting element 907 is used for said reference control indication information is sent to relative users;
Control indication information resolution unit 908 is used for according to said control indication information and actual downstream order value, in said power allocation information table, searches and obtains corresponding reference power value.
With reference to Figure 10, show in the system embodiment that the indicated horsepower of the MU-MIMO system according to the present invention distributes, the structural representation of user's scheduling unit comprises:
Subelement 1001 is obtained in the channel quality indication, is used for obtaining the channel quality indication of each user feedback of said system;
Second user's scheduling sublayer unit 1002 is used for obtaining the user that said system is dispatched to according to said channel quality indication.
With reference to Figure 11, show in the system embodiment of distributing according to the indicated horsepower of inventing the MU-MIMO system, the structural representation of actual downstream order value acquiring unit comprises:
First presets subelement 1101, is used for the user and presets said actual downstream order value by radio resource control signaling;
First notification unit 1102 is used for the user with said actual downstream order value informing base station.
In addition, the structure that actual downstream order value acquiring unit also can be shown in figure 12 comprises:
Second presets subelement 1201, is used for said base station and presets actual downstream order value;
The second notice subelement 1202 is used for the base station and notifies the user with said actual downstream order value.
With reference to Figure 13, show the structural representation of the base station embodiment of MU-MIMO system according to the present invention, wherein, base station 130 comprises:
Power allocation information table preset unit 1301: be used to preset the power allocation information table that base station and user share; The power allocation information table comprises, row rank value under a plurality of references, a plurality of reference control indication information and with each with reference to row rank value and the corresponding reference power value of each reference control indication information down;
Power division value acquiring unit 1302 is used for obtaining each user's of system power division value;
Actual downstream order value acquiring unit 1303 is used to obtain the actual downstream order value that base station and each user share;
Power allocation information is searched unit 1304, is used for according to power division value and actual downstream order value, in the power allocation information table, searches the reference power value with power division value coupling;
Reference control indication information transmitting element 1305 is used for the pairing reference control indication information of reference power value of coupling is sent to relative users.
With reference to Figure 14, Figure 14 is according among Figure 13, the structural representation of the embodiment of the user terminal under the base station covers, and user terminal 140 comprises:
Power allocation information table preset unit 1401: be used to preset the power allocation information table that base station and user share; The power allocation information table comprises, row rank value under a plurality of references, a plurality of reference control indication information and with each with reference to row rank value and the corresponding reference power value of each reference control indication information down;
Actual downstream order value acquiring unit 1402 is used to obtain the actual downstream order value that base station and the user who is dispatched to share;
Control indication information resolution unit 1403 is used for reference control indication information and actual downstream order value according to the base station transmission, in the power allocation information table, searches and obtains corresponding reference power value; Wherein,
The reference control indication information that send the base station is: according to power division value and actual downstream order value, and the pairing control indication information of reference power value that in the power allocation information table, finds, mate with the power division value;
The power division value is each user's in that the base station obtains, the system a power division value.
With reference to Figure 15, show the structural representation of the another kind of embodiment in base station of MU-MIMO system according to the present invention, base station 150 comprises:
Power allocation information table preset unit 1501: be used to preset the power allocation information table that base station and user share; The power allocation information table comprises, row rank value under a plurality of references, a plurality of reference control indication information and with each with reference to row rank value and the corresponding reference power value of each reference control indication information down;
User's scheduling unit 1502 is used for the user that the system that obtains is dispatched to;
Actual downstream order value acquiring unit 1503 is used to obtain the actual downstream order value that base station and the user who is dispatched to share;
User's assembled unit 1504 is used for according to actual downstream order value the user who is dispatched to being carried out the combination of power division in the pairing a plurality of reference power value of power allocation information table;
Overall performance gain calculating unit 1505 is used for the overall performance gain of the combination of rated output distribution, and selects the combination of the maximum power division of overall performance gain;
Reference control indication information acquiring unit 1506 is used for according to the power allocation information table, confirms in the combination of this power division the pairing reference control indication information of the user who is dispatched to;
Reference control indication information transmitting element 1507 is used for the reference control indication information is sent to relative users.
According to base station illustrated in fig. 15, the structure of the user terminal under it covers and the embodiment of the described user terminal of Figure 14 are similar, that is, comprising:
Power allocation information table preset unit: be used to preset the power allocation information table that base station and user share; The power allocation information table comprises, row rank value under a plurality of references, a plurality of reference control indication information and with each with reference to row rank value and the corresponding reference power value of each reference control indication information down;
Actual downstream order value acquiring unit is used to obtain the actual downstream order value that base station and the user who is dispatched to share;
Control indication information resolution unit is used for reference control indication information and actual downstream order value according to the base station transmission, in the power allocation information table, searches and obtains corresponding reference power value.
But different is:
The reference control indication information that send the base station is: in the combination according to the maximum power division of overall performance gain, and the reference power value that each user got control indication information determined, correspondence in the power allocation information table;
Being combined as of the power division that the overall performance gain is maximum: the base station is according to actual downstream order value pairing a plurality of reference power value in the power allocation information table; The user who is dispatched to is carried out the combination of power division; The overall performance of the combination that rated output distributes gains, and then obtains the combination of the maximum power division of overall performance gain.
To sum up, in the present invention:
Through presetting technological means such as shared power allocation information table in user and base station and following row rank value, each user's in the MU-MIMO system power distribution result is indicated to corresponding user, thereby make MU-MIMO system obtain bigger performance gain.
Each embodiment in this specification all adopts the mode of going forward one by one to describe, and what each embodiment stressed all is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.For system embodiment, because it is similar basically with method embodiment, so description is fairly simple, relevant part gets final product referring to the part explanation of method embodiment.
More than to a kind of multi-input multi-output system provided by the present invention be used for indicating power distributing method, system has carried out detailed introduction; Used concrete example among this paper principle of the present invention and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that on embodiment and range of application, all can change, to sum up, this description should not be construed as limitation of the present invention.
Claims (20)
1. the indicating power distributing method of a multiuser mimo system is characterized in that, comprises the steps:
Preset the power allocation information table that share base station and user in the said system, said power allocation information table comprises: row rank value under a plurality of references, a plurality of reference control indication information and with each said reference under row rank value and the corresponding reference power value of each said reference control indication information;
Obtain each user in the said system the power division value and, the actual downstream order value that base station and each user share;
The reference power value with said power division value coupling is searched according to said power division value and actual downstream order value in the base station in said power allocation information table;
The pairing control indication information of the reference power value of said coupling is sent to relative users;
The user searches in the power allocation information table and obtains corresponding reference power value according to said control indication information and actual downstream order value.
2. the method that indicated horsepower according to claim 1 distributes is characterized in that obtaining of said power division value comprises the steps:
Obtain the channel quality indication of each user feedback in the said system;
Carry out user's scheduling according to said channel quality indication, and carry out power division;
Quantize said power distribution result.
3. the method that indicated horsepower according to claim 2 distributes is characterized in that, said actual downstream order value presets the also following row rank value of informing base station for the user by radio resource control signaling.
4. the method that indicated horsepower according to claim 2 distributes is characterized in that obtaining of said actual downstream order value is specially:
User's actual downstream order value is preset and notified in the base station.
5. the method that is used to indicate power division of a multiuser mimo system is characterized in that, comprises the steps:
Preset the power allocation information table that share base station and user in the said system, said power allocation information table comprises: row rank value under a plurality of references, a plurality of reference control indication information and with each said reference under row rank value and the common corresponding reference performance number of each said reference control indication information;
Obtain the user who is dispatched in the said system, and, the actual downstream order value that base station and the said user who is dispatched to share;
According to actual downstream order value pairing a plurality of reference power value in said power allocation information table, the said user who is dispatched to is carried out the combination of power division;
Calculate said power division combination overall performance gain and select the combination of the maximum power division of overall performance gain;
According to said power allocation information table, confirm in this combination the pairing said reference control indication information of the said user who is dispatched to;
Said reference control indication information is sent to relative users;
The user searches in the power allocation information table and obtains corresponding reference power value according to said control indication information and actual downstream order value.
6. the method that indicated horsepower according to claim 5 distributes is characterized in that, obtains the user who is dispatched in the said system and specifically comprises:
Obtain the channel quality indication of each user feedback in the said system;
Obtain the user who is dispatched in the said system according to said channel quality indication.
7. the method that indicated horsepower according to claim 6 distributes is characterized in that, said actual downstream order value presets the also following row rank value of informing base station for the user by radio resource control signaling.
8. the method that indicated horsepower according to claim 6 distributes is characterized in that obtaining of said actual downstream order value is specially:
User's actual downstream order value is preset and notified in the base station.
9. the system that distributes of the indicated horsepower of a multiuser mimo system is characterized in that said system comprises:
Power allocation information table preset unit: be used for presetting the power allocation information table that said system base station and user share, said power allocation information table comprises: row rank value under a plurality of references, a plurality of reference control indication information and with each said reference under row rank value and the corresponding reference power value of each said reference control indication information;
Power division value acquiring unit is used for obtaining said each user's of system power division value;
Actual downstream order value acquiring unit is used to obtain the actual downstream order value that base station and each user share;
Power allocation information is searched the unit, is used for according to said power division value and actual downstream order value, in said power allocation information table, searches the reference power value with said power division value coupling;
Reference control indication information transmitting element is used for the pairing reference control indication information of the reference power value of said coupling is sent to relative users;
Control indication information resolution unit is used for according to said reference control indication information and actual downstream order value, in the power allocation information table, searches and obtains corresponding reference power value.
10. the system that distributes of the indicated horsepower of multiuser mimo system according to claim 9 is characterized in that said power division value acquiring unit comprises:
Subelement is obtained in channel quality indication, is used for obtaining the channel quality indication of said each user's of system feedback;
First user's scheduling sublayer unit is used for carrying out user's scheduling according to said channel quality indication, and carries out power division;
Power distribution result quantizes subelement, is used to quantize said power distribution result.
11. the system that the indicated horsepower of multiuser mimo system according to claim 10 distributes is characterized in that, power allocation information searches the unit and control indication information transmitting element is positioned at said base station end;
Said actual downstream order value acquiring unit and control indication information resolution unit are positioned at said user side, and said actual downstream order value acquiring unit comprises:
First presets subelement, is used for the user and presets said actual downstream order value by radio resource control signaling;
First notification unit is used for the user with said actual downstream order value informing base station;
Said power allocation information table preset unit lays respectively at said base station end and said user side.
12. the system that the indicated horsepower of multiuser mimo system according to claim 10 distributes; It is characterized in that; Said power division value acquiring unit, actual downstream order value acquiring unit, power allocation information searches the unit and reference control indication information transmitting element is positioned at said base station end; And said actual downstream order value acquiring unit comprises:
Second presets subelement, is used for said base station and presets actual downstream order value;
The second notice subelement is used for the base station and notifies the user with said actual downstream order value; And,
Control indication information resolution unit is positioned at said user side;
Said power allocation information table preset unit lays respectively at said base station end and said user side.
13. the system that the indicated horsepower of a multiuser mimo system distributes is characterized in that said system comprises:
Power allocation information table preset unit; Be used for presetting the power allocation information table that said system base station and user share, said power allocation information table comprises: row rank value under a plurality of references, a plurality of reference control indication information and with each said reference under row rank value and the corresponding reference power value of each said reference control indication information;
User's scheduling unit is used for obtaining the user that said system is dispatched to;
Actual downstream order value acquiring unit is used to obtain the actual downstream order value that base station and the said user who is dispatched to share;
User's assembled unit is used for according to actual downstream order value in the pairing a plurality of reference power value of said power allocation information table the said user who is dispatched to being carried out the combination of power division;
Overall performance gain calculating unit is used to calculate the overall performance gain of the combination of said power division, and selects the combination of the maximum power division of overall performance gain;
Reference control indication information acquiring unit is used for confirming in the combination of this power division the pairing reference control indication information of the said user who is dispatched to according to said power allocation information table;
Reference control indication information transmitting element is used for said reference control indication information is sent to relative users;
Control indication information resolution unit is used for according to said control indication information and actual downstream order value, in said power allocation information table, searches and obtains corresponding reference power value.
14. the system that the indicated horsepower of multiuser mimo system according to claim 13 distributes is characterized in that said user's scheduling unit comprises:
Subelement is obtained in the channel quality indication, is used for obtaining the channel quality indication of each user feedback of said system;
Second user's scheduling sublayer unit is used for obtaining the user that said system is dispatched to according to said channel quality indication.
15. the system that the indicated horsepower of multiuser mimo system according to claim 14 distributes; It is characterized in that said user's scheduling unit, user's assembled unit, overall performance gain calculating unit, reference control indication information acquiring unit, reference control indication information transmitting element are positioned at said base station end;
Said actual downstream order value acquiring unit, and control indication information resolution unit is positioned at said user side; And,
Said actual downstream order value acquiring unit comprises:
First presets subelement, is used for the user and presets said actual downstream order value by radio resource control signaling;
First notification unit is used for the user with said actual downstream order value informing base station, and,
Said power allocation information table preset unit lays respectively at said base station end and said user side.
16. the system that the indicated horsepower of multiuser mimo system according to claim 14 distributes; It is characterized in that said user's scheduling unit, actual downstream order value acquiring unit, user's assembled unit, overall performance gain calculating unit, reference control indication information acquiring unit, reference control indication information transmitting element are positioned at said base station end; Wherein,
Said actual downstream order value acquiring unit comprises:
Second presets subelement, is used for said base station and presets actual downstream order value;
The second notice subelement is used for the base station and notifies the user with said actual downstream order value;
Said control indication information resolution unit is positioned at said user side; And,
Said power allocation information table preset unit lays respectively at said base station end and said user side.
17. the base station of a multiuser mimo system is characterized in that, said base station comprises:
Power allocation information table preset unit: be used to preset the power allocation information table that base station and user share; Said power allocation information table comprises, row rank value under a plurality of references, a plurality of reference control indication information and with each said reference under row rank value and the corresponding reference power value of each said reference control indication information;
Power division value acquiring unit is used for obtaining said each user's of system power division value;
Base station side actual downstream order value acquiring unit is used to obtain the actual downstream order value that base station and each user share, and said actual downstream order value is sent to corresponding user; Perhaps, be used to receive the actual downstream order value that the user sends;
Power allocation information is searched the unit, is used for according to said power division value and actual downstream order value, in said power allocation information table, searches the reference power value with said power division value coupling;
Reference control indication information transmitting element is used for the pairing reference control indication information of the reference power value of said coupling is sent to relative users.
18. the base station of a multiuser mimo system is characterized in that, said base station comprises:
Power allocation information table preset unit: be used to preset the power allocation information table that base station and user share; Said power allocation information table comprises, row rank value under a plurality of references, a plurality of reference control indication information and with each said reference under row rank value and the corresponding reference power value of each said reference control indication information;
User's scheduling unit is used for obtaining the user that said system is dispatched to;
Base station side actual downstream order value acquiring unit is used to obtain actual downstream order value that base station and the said user who is dispatched to share and said actual downstream order value is sent to corresponding user; Perhaps, be used to receive the actual downstream order value that the user sends;
User's assembled unit is used for according to actual downstream order value in the pairing a plurality of reference power value of said power allocation information table the said user who is dispatched to being carried out the combination of power division;
Overall performance gain calculating unit is used to calculate the overall performance gain of the combination of said power division, and selects the combination of the maximum power division of overall performance gain;
Reference control indication information acquiring unit is used for confirming in the combination of this power division the pairing reference control indication information of the said user who is dispatched to according to said power allocation information table;
Reference control indication information transmitting element is used for said reference control indication information is sent to relative users.
19. the user terminal of a multiuser mimo system is characterized in that, said user terminal comprises:
Power allocation information table preset unit: be used to preset the power allocation information table that base station and user share; Said power allocation information table comprises, row rank value under a plurality of references, a plurality of reference control indication information and with each said reference under row rank value and the corresponding reference power value of each said reference control indication information;
User side actual downstream order value acquiring unit is used to obtain actual downstream order value that base station and the said user who is dispatched to share and said actual downstream order value is sent to relevant base station; Perhaps, be used to receive the actual downstream order value that send the base station;
Control indication information resolution unit is used for reference control indication information and actual downstream order value according to the base station transmission, in the power allocation information table, searches and obtains corresponding reference power value; Wherein,
The reference control indication information that send said base station is: according to power division value and actual downstream order value, and the pairing control indication information of reference power value that in said power allocation information table, finds, mate with said power division value;
Said power division value is each user's in the system that the base station obtains, a said power division value.
20. the user terminal of a multiuser mimo system is characterized in that, said user terminal comprises:
Power allocation information table preset unit: be used to preset the power allocation information table that base station and user share; Said power allocation information table comprises, row rank value under a plurality of references, a plurality of reference control indication information and with each said reference under row rank value and the corresponding reference power value of each said reference control indication information;
User side actual downstream order value acquiring unit is used to obtain actual downstream order value that base station and the said user who is dispatched to share and said actual downstream order value is sent to relevant base station; Perhaps, be used to receive the actual downstream order value that send the base station;
Control indication information resolution unit is used for reference control indication information and actual downstream order value according to the base station transmission, in the power allocation information table, searches and obtains corresponding reference power value; Wherein,
The reference control indication information that send said base station is: in the combination according to the maximum power division of overall performance gain, and the reference power value that each user got control indication information determined, correspondence in said power allocation information table;
Being combined as of the power division that said overall performance gain is maximum: the base station is according to actual downstream order value pairing a plurality of reference power value in said power allocation information table; The user who is dispatched to is carried out the combination of power division; Calculate the overall performance gain of the combination of said power division, and then obtain the combination of the maximum power division of overall performance gain.
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| CN101145817A (en) * | 2006-09-14 | 2008-03-19 | 联想(北京)有限公司 | An allocation method and transmitter for space transmission power of multi-input and multi-output system |
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| CN101145817A (en) * | 2006-09-14 | 2008-03-19 | 联想(北京)有限公司 | An allocation method and transmitter for space transmission power of multi-input and multi-output system |
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