CN105830376B

CN105830376B - A kind of method and device of Adaptive Modulation and Coding

Info

Publication number: CN105830376B
Application number: CN201480036325.3A
Authority: CN
Inventors: 唐志华
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2014-11-24
Filing date: 2014-11-24
Publication date: 2019-03-26
Anticipated expiration: 2034-11-24
Also published as: CN105830376A; WO2016082085A1

Abstract

The embodiment of the present invention provides a kind of method and device of Adaptive Modulation and Coding, is related to wireless domain, can be improved the accuracy of MCS selection, and then improve system throughput.In TTI N-T, first base station determines scheduling information of first user equipment (UE) in TTI N of first community, in TTI N, first base station obtains the scheduling information of the 2nd UE of second community, according to the scheduling information of the metrical information and the 2nd UE of the metrical information of the first UE and the scheduling information and the 2nd UE of the first UE in first community, first base station obtains the SINR predicted value of the first UE；First base station obtains the SINR value of the first UE according to SINR predicted value and SINR adjustment amount；First base station determines MCS corresponding to the SINR value of the first UE according to the corresponding relationship of SINR and modulation coding scheme MCS.The method and device of the Adaptive Modulation and Coding is used for Adaptive Modulation and Coding.

Description

A kind of method and device of Adaptive Modulation and Coding

Technical field

The present invention relates to wireless domain more particularly to a kind of method and devices of Adaptive Modulation and Coding.

Background technique

Adaptive Modulation and Coding (Adaptive Modulation and Coding, AMC) technology is a kind of in guarantee nothing Under the premise of line reliability of communication system, modulation coding scheme (Modulation is adaptive selected according to radio channel state And Coding Scheme, MCS), to improve the adaptive technique of wireless communication system throughput.

By taking long term evolution (Long Term Evolution, LTE) system as an example, in the prior art, evolution base station After (evolved NodeB, eNB) receives the reference signal of user equipment (User Equipment, UE) transmission, as channel is visited Survey reference signal (Sounding Reference Signal, SRS) or demodulated reference signal (Demodulation Reference Signal, DMRS), uplink signal and interference plus noise ratio (Signal to are measured according to the reference signal Interference and Noise Ratio, SINR), and smothing filtering is carried out to the SINR, it obtains upstream sinr and smoothly filters Wave number；When dispatching the UE, base station is using the upstream sinr smothing filtering value as the UE in several Transmission Time Intervals (Transmission Time Interval, TTI) carries out SINR predicted value when actual number biography afterwards, and with SINR adjustment amount pair The SINR predicted value is modified to obtain SINR value, according between the SINR value and upstream sinr and uplink MCS Corresponding relationship obtains the MCS that output needs to use.

But due to the non-standing of UE business, the data transmission of UE was not only discontinuous in the time domain, but also on frequency domain often It changes, the variation for the adjacent area interference for causing UE to be subject to is very violent, and in the time domain without any correlation.In order to solve MCS selection inaccuracy, base station can obtain adjacent area by interaction between base station and interfere, but the unreasonably in actual wireless network system Want to return, cause base station that can not obtain adjacent area interference in time, can not accurately select MCS using real-time interference information.Therefore, non- Under ideal passback scene, the accuracy of MCS selection is improved using adjacent area interference information and system throughput is one urgently to be resolved The problem of.

Summary of the invention

The embodiment of the present invention provides a kind of method and device of Adaptive Modulation and Coding, can be improved the standard of MCS selection True property, and then improve system throughput.

In order to achieve the above objectives, the embodiment of the present invention adopts the following technical scheme that

In a first aspect, providing a kind of method of Adaptive Modulation and Coding, comprising:

In Transmission Time Interval TTI N-T, first base station determines tune of first user equipment (UE) in TTI N of first community Information is spent, the scheduling information includes the resource block and transmission power for the first UE distribution, wherein in the TTI N, institute It states first base station and dispatches the first UE, the first base station belonging to the first community；

In the TTI N, the first base station obtains the scheduling information of the 2nd UE of second community, the second community institute Belong to the second base station, the scheduling information of the 2nd UE is scheduling information of the 2nd UE in the TTI N, the 2nd UE Scheduling information to be second base station determining in the TTI N-T and is sent to the scheduling information of the first base station；

When the resource block of the first UE is identical as the resource block of the 2nd UE, the first base station obtains described the Metrical information and twoth UE metrical information in the first community of one UE in the first community；

It is small first according to the scheduling information and the 2nd UE of the metrical information of the first UE and the first UE The scheduling information of metrical information and the 2nd UE in area, the first base station obtains the signal of the first UE and interference adds Noise ratio SINR predicted value；

The first base station obtains the SINR value of the first UE according to the SINR predicted value and SINR adjustment amount；

The first base station determines the SINR of the first UE according to the corresponding relationship of SINR and modulation coding scheme MCS The corresponding MCS of value.

With reference to first aspect, the first can be in realization mode, described in Transmission Time Interval TTI N-T, the first base The first user equipment (UE) for determining first community stand after the scheduling information of TTI N, the method also includes:

In TTI N-S, the first base station obtains retransmission information of the 3rd UE in the first community, the retransmission information The feedback information retransmitted in the TTI N is needed including the 3rd UE, the S is less than the T, and the T is first base The first community stood obtains the time delay of the scheduling information of the 2nd UE of the second community；

In the TTI N, the first base station determines that the 3rd UE is not scheduled in the TTI N-T, will be described 3rd UE postpones scheduling dispatching cycle.

Mode can be realized in conjunction with the first, it is described that 3rd UE is postponed into a tune in second of achievable mode Spending periodic scheduling includes:

When one dispatching cycle is 8 TTI, in TTI N+8-T, the first base station determines the of first community Three UE are in the scheduling information of TTI N+8, and in TTI N+8, the first base station sends out uplink authorization UL Grant to the 3rd UE, Wherein the new data instruction NDI in the UL Grant is not overturn, carry out the 3rd UE using in a manner of adaptive retransmission It retransmits.

With reference to first aspect, the third can in realization mode, the method also includes:

In TTI N-S, the first base station obtains retransmission information of the 3rd UE in the first community, the retransmission information The feedback information retransmitted in the TTI N is needed including the 3rd UE；

In the TTI N-T, the first base station determines scheduling information of the 3rd UE in the TTI N of first community, The T is the time delay for the scheduling information that the first community of the first base station obtains the 2nd UE of the second community；

After the scheduling information that the first base station obtains the 2nd UE of second community, the method also includes:

In the TTI N, the first base station sends out uplink authorization ULGrant to the 3rd UE, wherein the UL New data instruction NDI in Grant is not overturn, retransmit the 3rd UE using in a manner of adaptive retransmission.

Second aspect provides a kind of method of Adaptive Modulation and Coding, comprising:

In TTI N-S, the first base station obtains the first UE in the retransmission information of the first community, the re-transmission Information includes the feedback information that the first UE needs to retransmit in the TTI N；

In the TTI N, the first base station sends out uplink authorization UL Grant to the first UE, wherein the UL New data instruction NDI in Grant is not overturn, retransmit the first UE using in a manner of adaptive retransmission.

The third aspect provides a kind of base station, comprising:

Processing unit, in Transmission Time Interval TTI N-T, first base station to determine the first user equipment of first community For UE in the scheduling information of TTI N, the scheduling information includes the resource block and transmission power for the first UE distribution, wherein In the TTI N, the first base station dispatches the first UE, the first base station belonging to the first community；

Acquiring unit is used in the TTI N, and the first base station obtains the scheduling information of the 2nd UE of second community, Second base station belonging to the second community, the scheduling information of the 2nd UE are scheduling of the 2nd UE in the TTI N Information, the scheduling information of the 2nd UE are second base station in the TTI N-T determination and are sent to the first base station Scheduling information；

The acquiring unit is also used to when the resource block of the first UE is identical as the resource block of the 2nd UE, described First base station obtains metrical information and twoth UE of the first UE in the first community in the first community In metrical information；

The processing unit be also used to according to the metrical information of the first UE and the scheduling information of the first UE and The scheduling information of metrical information and twoth UE of 2nd UE in first community, the first base station obtain described the The Signal to Interference plus Noise Ratio SINR predicted value of one UE；

The processing unit is also used to the first base station according to the SINR predicted value and the acquisition of SINR adjustment amount The SINR value of first UE；

The processing unit is also used to the first base station according to the corresponding relationship of SINR and modulation coding scheme MCS, really MCS corresponding to the SINR value of fixed first UE.

Fourth aspect provides a kind of base station, comprising:

The processing unit is also used in TTI N-S, and the first base station obtains the first UE in the first community Retransmission information, the retransmission information includes the feedback information that the first UE needs to retransmit in the TTI N；

Transmission unit is used in the TTI N, and the first base station sends out uplink authorization UL Grant to the first UE, Wherein the new data instruction NDI in the UL Grant is not overturn, carry out the first UE using in a manner of adaptive retransmission It retransmits.

5th aspect, provides a kind of base station, comprising:

Memory, for storing program code；

Processor, for calling the program code of the memory storage to execute following method: in Transmission Time Interval TTI N-T, first base station determine that scheduling information of first user equipment (UE) in TTI N of first community, the scheduling information include being The resource block and transmission power of the first UE distribution, wherein in the TTI N, the first base station dispatches the first UE, The first base station belonging to the first community；

Receiver, in the TTI N, the first base station to obtain the scheduling information of the 2nd UE of second community, institute The second base station belonging to second community is stated, the scheduling information of the 2nd UE is that scheduling of the 2nd UE in the TTI N is believed Breath, the scheduling information of the 2nd UE are second base station in the TTI N-T determination and are sent to the first base station Scheduling information；

The method that the processor executes further include:

The processor is also used to scheduling information and the institute of metrical information and the first UE according to the first UE The scheduling information of metrical information and twoth UE of the 2nd UE in first community is stated, the first base station obtains described first The Signal to Interference plus Noise Ratio SINR predicted value of UE；

The processor is also used to the first base station and obtains described the according to the SINR predicted value and SINR adjustment amount The SINR value of one UE；

The processor is also used to the first base station according to the corresponding relationship of SINR and modulation coding scheme MCS, determines MCS corresponding to the SINR value of first UE.

6th aspect, provides a kind of base station, comprising:

Memory, for storing program code；

The processor is also used in TTI N-S, and the first base station obtains the first UE in the first community Retransmission information, the retransmission information include the feedback information that the first UE needs to retransmit in the TTI N；

Transmitter is used in the TTI N, and the first base station sends out uplink authorization UL Grant to the first UE, Described in new data instruction NDI in UL Grant do not overturn, by make the first UE using adaptive retransmission in a manner of carry out weight It passes.

The embodiment of the present invention provides the method and device of Adaptive Modulation and Coding, compared with the existing technology, by TTI N-T, first base station determine scheduling information of the first UE in TTI N of first community, and in the TTI N, which is obtained Second community the 2nd UE that the TTI N-T is determining and is sent to the first base station scheduling information, in non-ideal passback field Under scape, it can overcome and obtain other users equipment to the transmission delay of the disturbing factor of the first UE, consider other users equipment pair The disturbing factor of first UE improves the precision that base station calculates the SINR value of the first scheduled UE of current area, thus according to The SINR value selects MCS, improves the accuracy of MCS selection, and then improves wireless communication system throughput.

Detailed description of the invention

In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with It obtains other drawings based on these drawings.

Fig. 1 provides a kind of LTE communication system structural schematic diagram for the embodiment of the present invention；

Fig. 2 provides a kind of method flow diagram of Adaptive Modulation and Coding for the embodiment of the present invention；

Fig. 3 provides the method flow diagram of another Adaptive Modulation and Coding for the embodiment of the present invention；

Fig. 4 provides the method flow diagram of another Adaptive Modulation and Coding for the embodiment of the present invention；

Fig. 5 provides the method flow diagram of another Adaptive Modulation and Coding for the embodiment of the present invention；

Fig. 6 provides the method flow diagram of another another Adaptive Modulation and Coding for the embodiment of the present invention；

Fig. 7 provides a kind of architecture of base station schematic diagram for the embodiment of the present invention；

Fig. 8 provides another architecture of base station schematic diagram for the embodiment of the present invention；

Fig. 9 provides another architecture of base station schematic diagram for the embodiment of the present invention；

Figure 10 provides another architecture of base station schematic diagram for the embodiment of the present invention；

Figure 11 provides another another architecture of base station schematic diagram for the embodiment of the present invention.

Specific embodiment

Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other Embodiment shall fall within the protection scope of the present invention.

Various embodiments of the present invention can be applied in the plurality of application scenes being made of transmitting terminal and receiving end, wherein on Transmitting terminal is user equipment when row transmission, and receiving end is base station.

As shown in Figure 1, a kind of LTE communication system structural schematic diagram, including base station A, base station B, user equipment 1, Yong Hushe Standby 2, user equipment 3, user equipment 4, user equipment 5 and user equipment 6.

Wherein, the coverage area of base station A can justify solid line as shown in Figure 1, and dotted line show base station A for coverage area It is divided into cell A1, cell A2 and cell A3, it is adjacent two-by-two between cell A1, cell A2 and cell A3.User equipment 1, user Equipment 2, user equipment 3 and user equipment 4 are registered in cell A1, and user equipment 5 is registered in cell A2.User equipment 1, Yong Hushe Standby 2, user equipment 3, user equipment 4 and user equipment 5 are carried out wireless communication with base station A respectively.

The coverage area of base station B can justify solid line as shown in Figure 1, and dotted line show base station B and divides coverage area It is adjacent two-by-two between cell B1, cell B2 and cell B3 for cell B1, cell B2 and cell B3.User equipment 6 is registered in cell B3.User equipment 6 is carried out wireless communication with base station B.

Optionally, at least two cells composition association in cell A1, cell A2, cell A3, cell B1, cell B2 and cell B3 Make cell set.

The embodiment of the present invention provides a kind of method of Adaptive Modulation and Coding, is applied to base station, as shown in Figure 2, comprising:

Step 201, in Transmission Time Interval TTI N-T, first base station determines that the first user equipment (UE) of first community exists The scheduling information of TTI N.

First UE is registered in first community, is communicated by first community with base station, and base station is the first scheduled UE Allocation schedule information, the scheduling information include that base station is the resource block and transmission power that the first UE is distributed in first community, the The base station belonging to one cell.At the time of the N is that base station determines the scheduling information of user equipment of the first community.The tune Spending information includes the resource block distributed by user equipment and transmission power.

Step 202, in the TTI N, the first base station obtains the scheduling information of the 2nd UE of second community.

Second base station belonging to the second community, the scheduling information of the 2nd UE are the 2nd UE in the TTI The scheduling information of N, to be second base station determining in the TTI N-T and is sent to described for the scheduling information of the 2nd UE The scheduling information of one base station.It should be noted that first base station belonging to the second base station belonging to second community and first community Difference, the second base station belonging to first base station and second community belonging to first community can by X2 interface or S1 interface into The interaction of row scheduling information.The scheduling information of 2nd UE of second community includes that the second base station belonging to second community is second community The 2nd UE distribution resource block and transmission power.In this method of the present invention, second community is contained at least one Second user equipment.

Base station can obtain at least one Transmission Time Interval (Transmission Time IntervaI, TTI) The scheduling information of the second user equipment of at least one second community.

Step 203, when the resource block of the first UE is identical as the resource block of the 2nd UE, the first base station obtains Take measurement letter of metrical information and twoth UE of the first UE in the first community in the first community Breath.

Step 204, according to the metrical information of the first UE and scheduling information and the 2nd UE of the first UE The scheduling information of metrical information and the 2nd UE in first community, the first base station obtain the signal of the first UE With interference plus noise ratio SINR predicted value.

Step 205, the first base station obtain the first UE's according to the SINR predicted value and SINR adjustment amount SINR value.

Base station counts the adjustment amount that uplink Block Error Rate (Block Error Rate, BLER) calculates SINR, passes through the SINR Adjustment amount the SINR predicted value is adjusted, obtain the SINR value of the UE.If uplink BLER is unsatisfactory for preset BLER mesh Scale value, then the adjustment amount in this adjustment period will raise on the basis of the adjustment amount in a upper period according to preset adjustment amplitude；If Uplink BLER be greater than BLER target value, then the adjustment amount in this adjustment period by the basis of the adjustment amount in a upper period according to preset Adjustment amplitude lower.

Step 206, the first base station determine described first according to the corresponding relationship of SINR and modulation coding scheme MCS MCS corresponding to the SINR value of UE.

Base station is scheduled the first biography UE of first community using MCS corresponding to the SINR value for just passing UE.

Compared with the existing technology, by the way that in TTI N-T, first base station determines tune of the first UE in TTI N of first community Information is spent, in the TTI N, which obtains second community in the TTI N-T determination and be sent to the first base station The scheduling information of the 2nd UE can overcome under non-ideal passback scene and obtain interference of the other users equipment to the first UE The transmission delay of factor considers that other users equipment to the disturbing factor of the first UE, improves base station calculating current area and adjusted The precision of the SINR value of first UE of degree improves the accuracy of MCS selection, Jin Erti to select MCS according to the SINR value High wireless communication system throughput.

The embodiment of the present invention provides a kind of method of Adaptive Modulation and Coding, is applied to base station, as shown in Figure 3, comprising:

Step 301, in Transmission Time Interval TTI N-T, first base station determines that the first user equipment (UE) of first community exists The scheduling information of TTI N.

The scheduling information includes the resource block and transmission power for the first UE distribution, wherein in the TTI N, The first base station dispatches the first UE, the first base station belonging to the first community.

Step 302, in TTI N-S, the first base station obtains the first UE in the retransmission information of the first community.

The retransmission information includes the feedback information that the first UE needs to retransmit in the TTI N.It should be noted that TTI N-S is less than TTI N-T, and optionally, TTI N-S is greater than TTI N-T.

Step 303, in the TTI N, the first base station sends out uplink authorization UL Grant to the first UE, wherein institute The new data instruction NDI stated in UL Grant is not overturn, retransmit the first UE using in a manner of adaptive retransmission.

Compared with the existing technology, by the way that in TTI N-T, first base station determines tune of the first UE in TTI N of first community Information is spent, when in TTI N-S, which obtains the first UE in the retransmission information of the first community, in the TTI N, which can send out uplink authorization UL Grant to the first UE, wherein the new data in the UL Grant indicates NDI is not overturn, to make the first UE using being retransmitted in a manner of adaptive retransmission, under non-ideal passback scene, and Neng Gouke Clothes obtain other users equipment to the transmission delay of the disturbing factor of the first UE, consider interference of the other users equipment to the first UE Factor improves the precision that base station calculates the SINR value of the first scheduled UE of current area, to select according to the SINR value MCS, improves the accuracy of MCS selection, and then improves wireless communication system throughput.

The embodiment of the present invention provides a kind of method of Adaptive Modulation and Coding, applied to LTE communication system as shown in Figure 1 System, as shown in Figure 4, comprising:

Step 401, TTI N-T, base station A determine cell A1 user equipment 1 and user equipment 2 TTI N scheduling Information.

The cell A1 of base station A is obtained to be set in the user that TTI N needed be delayed by the upper dispatching cycle carried out data transmission The scheduling information of standby 1 scheduling information and the user equipment 2 for needing just to pass, while the user that a upper dispatching cycle is delayed by being set The scheduling information for the user equipment 2 that standby 1 scheduling information and needs just passes shares to other cells, such as cell B3.The user Equipment 2 is just to pass user equipment, and base station A is that the user equipment 2 in cell A1 distributes resource block and transmission power, the tune of cell A1 Degree information includes the resource block distributed for user equipment 2 and transmission power.It should be noted that the T is the cell A1 of base station A The time delay of the scheduling information of the scheduling information of the user equipment 5 of cell A2 and the user equipment 6 of cell B3 is obtained, the N is should Base station A determines the scheduling information of the user equipment of cell A1.In general, frequency division duplex (Frequency Division Duplexing, FDD) a dispatching cycle be 8 Transmission Time Intervals.

Step 402 obtains user equipment 3 in the retransmission information of cell A1 in TTI N-S, base station A.

Retransmission information includes the feedback information that user equipment 3 needs to retransmit in the TTI N.

Step 403, in TTI N, base station A obtains the scheduling information of user equipment 5 of cell A2 and the user of cell B3 sets Standby 6 scheduling information.

The scheduling information of the user equipment 5 of cell A2, base station are obtained by internal interface in TTI N, the cell A1 of base station A The cell A1 of A obtains the scheduling information of the user equipment 6 of cell B3 by X2 interface from base station B.The user equipment 6 of cell B3 Scheduling information can be base station B in the TTI N-T determination and be sent to the scheduling information of the base station A.The scheduling information Cell A2 including base station A is that user equipment 5 distributes resource block and transmission power, and the cell B3 of base station B is the distribution of user equipment 6 Resource block and transmission power.Wherein, N-S < N.

It should be noted that other cells also obtain the scheduling letter of the user equipment of the cell in addition to current area simultaneously Breath.

It is exemplary, as shown in figure 5, first community, second community and third cell are the cell of the same cooperation cell collection, Starting in the N-T TTI between n-th TTI, first community obtains the scheduling information of second community and third cell, and second Cell obtains the scheduling information of first community and third cell, and third cell obtains the scheduling letter of first community and second community Breath.In first community, each cell obtains the scheduling of the scheduling information and other cells of itself in second community and third cell After information, first community, second community and third cell carry out cooperation interference prediction respectively, obtain SINR predicted value.

It should be noted that cell of the present invention can be the cell in a cooperation cell collection, cooperation cell collection It including at least two cells, can be static settings, be also possible to dynamic.The cell that cooperation cell collection includes is also possible to The cell of different base station is interacted between multiple base stations by optical fiber or Ethernet (such as interconnection agreement wireless access network IPRAN) Scheduling information, but must assure that the cell in the collection of cooperation cell is synchronous.

Step 404, base station A determine retransmission user equipment.

It should be noted that uplink hybrid automatic repeat request (Hybrid Automatic Repeat Request, HARQ) during, it is assumed that in the n-th subframe, base station sends uplink authorization to user equipment, in user equipment distribution Row resource, in order to which user equipment transmits data using the ascending resource, user equipment receives uplink in n-th of subframe and awards Power, then receive in the n-th+4 subframes and just pass data, and physical layer baseband processing portion decodes following according to 24 bits after data Ring redundancy check code (Cyclic Redundancy Check, CRC) check value verifies the correctness of decoding data, and will decoding As a result it is sent to HARQ entity, HARQ entity sends feedback information to user equipment in n+8 subframe, sends if decoding is correct ACK, if decoding error sends NACK.User equipment is in the inscribed feedback information for receiving just biography data of n+8 subframe, if receiving ACK then sends new data in next poll subframe, if receiving NACK, sends in n+12 subframe and retransmits data.

As S < T, according to TTI N-S obtain the TTI N retransmission user equipment and it is described just pass user equipment Determine the retransmission user equipment for needing to retransmit in the N.Specifically, if in TTI N-S acquisition in the TTI N retransmission user Equipment is scheduled in the TTI N-T, is determined as described what TTI N-S was obtained in the TTI N retransmission user equipment The TTI N needs the retransmission user equipment retransmitted；If in TTI N-S acquisition in the TTI N retransmission user equipment in institute It states TTI N-T not to be scheduled, postpones a scheduling in the TTI N retransmission user equipment what TTI N-S was obtained for described Periodic scheduling.

It is exemplary, the scheduling information of user equipment 1 and user equipment 2 in cell A1 is only obtained in TTI N-T, base station A, The retransmission information in TTI N user equipment 3 in cell A1 is not got, only by user equipment 1 and user equipment 2 in cell A1 In scheduling information share to other cells, and just obtain in TTI N user equipment 3 in TTI N-S, base station A in first community Retransmission information, therefore, user equipment 3 is postponed dispatching cycle by base station A to be dispatched.

Base station A sends confirmation ACK to user equipment 3, the hybrid automatic repeat request process of user equipment 3 is hung up, so Afterwards, eat dishes without rice or wine 8 TTI (LTE uplink is synchronous HARQ) of upper delay send out again uplink scheduling instruction UL Grant scheduling user's set 3. Because T TTI of forward scheduling, therefore postpone 8-T TTI scheduling user's set 3, that is, realize 8 TTI of upper delay that eat dishes without rice or wine. HARQ, which is equivalent to from 8 TTI dispatching cycle, is deferred to 16 TTI.Re-transmission must send out UL Grant, and wherein new data indicates NDI It does not overturn, uses adaptive retransmission mode.In addition, when not receiving UL Grant, not retransmitted when user equipment 3 only receives ACK Data, but the variable CURRENT_TX_NB for recording transmission times is still cumulative, once CURRENT_TX_NB reaches configuration most Big transmission times -1, then user equipment 3 can empty HARQ caching.In order to solve this problem, if target maximum retransmission is M, then the maximum retransmission for being allocated to UE just needs for 2M.

It should be noted that if base station A obtains the retransmission information in TTI N user equipment 1 in cell A1 in TTI N-S, The scheduling information for the user equipment 1 that a upper dispatching cycle is delayed by was obtained in TTI N-T, the cell A1 of base station A, because in TTI N-T scheduled user equipment 1, be carried out according to the scheduling information for the user equipment 1 being delayed by a upper dispatching cycle to user equipment 1 It retransmits.In this way, both will not influence other scheduled users of this cell, the Interference Estimation of adjacent area will not be influenced.

Particularly, it as S > T, in TTI N-S, obtains and believes in TTI N retransmission user equipment in the re-transmission of the cell A1 Breath, the retransmission information include the feedback information that the retransmission user equipment needs to retransmit in TTI N；In TTI N-T, obtain The scheduling information of the first biography user equipment of the TTI N cell A1 and the scheduling information of the retransmission user equipment；In TTI N, The re-transmission for being determined as needing to retransmit in the TTI N in the TTI N retransmission user equipment obtained in TTI N-S is used Family equipment.

Exemplary, in TTI N-S, base station A obtains the retransmission information in TTI N user equipment 4 in cell A1, in TTI N- T, obtains the scheduling information of the scheduling information and user equipment 4 in the user equipment 2 of the TTI N cell A1, and user is set Standby 2 scheduling information and the scheduling information of user equipment 4 are sent to cell A2 and cell B3, will be described in TTI N- in TTI N What S was obtained is determined as the retransmission user equipment for needing to retransmit in the TTI N in the TTI N user equipment 4.In TTI N, base A stand to the hair uplink authorization UL Grant of user equipment 4, wherein the new data instruction NDI in the UL Grant is not overturn, user Equipment 4 carries out adaptive retransmission according to the first biography scheduling information of user equipment 4.

It should be noted that S is 1-2 milliseconds in general, T is 2-4 milliseconds.

Step 405, base station A according to the metrical information of user equipment 2, the scheduling information of user equipment 2, cell A2 user Equipment 5 is in the scheduling information of metrical information, user equipment 5 in cell A1, survey of the user equipment 6 in cell A1 of cell B3 Amount information, the scheduling information of user equipment 6 obtain the SINR predicted value of the user equipment 2.

Firstly, cell A1 sets user after the completion of resource block and the transmission power interaction of the user equipment in all cells In the standby 2 each resource blocks (RB) distributed and the user equipment 5 of cell A2 and the user equipment 6 of cell B3 that receive Resource block compares.If in the resource block that A2 user equipment 5 uses in cell also including the resource that user equipment 2 is distributed Block then sets interference source of the user equipment 2 on the resource block in cell A1 for user equipment 5, similarly, if using in cell B3 Also include the resource block that user equipment 2 is distributed in the resource block that family equipment 6 uses, then sets cell A1 for user equipment 6 Interference source of the middle user equipment 2 on the resource block.

It is exemplary, as shown in Figure 6, it is assumed that include n-th of money in the resource block that second user equipment is distributed in first community Source block (Resource Block, RB) 51 in the resource block of second user equipment distribution also includes resource block n in second community, It also include resource block n in the resource block that third user equipment distributes in third cell.Due to LTE communication system channeling because Son is 1, and the user equipment for occupying same resource block is interfered in the same time using identical resource block each other, then in resource block n On, third user equipment is the dry of second user equipment in first community in second user equipment and third cell in second community Disturb source.

It should be noted that first community can do all when the metrical information for getting user equipment is more It disturbs source to sort according to signal strength or weakness, interference strength is selected to reach the interference source of certain predetermined thresholding or the interference source of preset quantity.

Then, the cell A1 of base station A obtains user equipment 2 to the channel information of cell A1, the transmitting function of user equipment 2 Rate and user equipment 2 using same resource block user equipment to cell A1 channel information, identical as 2 use of user equipment The transmission power of the user equipment of resource block and the interference noise to the user equipment 2 in addition to cell are estimated, calculate The SINR predicted value, the channel information include channel response estimation.

It is exemplary, the SINR of each subcarrier for every RB that user equipment is distributed can be calculated as according to formula (1.1a) Then the SINR predicted value of each subcarrier is merged into SINR predicted value of the user equipment on scheduling bandwidth by predicted value:

Wherein, γ_{N, j}For the SINR, p on RB n subcarrier j_{N, j}For transmitting function of the user equipment on RB n subcarrier j Rate, w_{N, j}For signal detection weight vector of the user equipment on RB n subcarrier j, h_{N, j}It is user equipment on RB n subcarrier j Channel response vector, R_{Zz, n, j}For interference noise covariance matrix, ()^HIndicate conjugate transposition.

Then, the SINR of subcarrier is merged into RB grades of SINR γ_n, the SINR predicted value for user equipment is remerged, Merge formula and depends on the receiver used.For example, by using least mean-square error (Minimum Mean Square Error, MMSE) when receiver, it can use the SINR γ that the SINR of subcarrier is first merged into RB grades by formula (1.2)_n, recycle formula (1.2) by RB grades of SINR γ_nMerge into the SINR predicted value of user equipment, formula (1.2) are as follows:

Wherein, L is to merge set element number, the i.e. number of subcarrier or the number of RB.

It optionally, can also be with base when channel information includes Reference Signal Received Power and/or Reference Signal Received Quality Same resource block is used in the channel information of user equipment 2 to cell A1, the transmission power of user equipment 2 and user equipment 2 User equipment to cell A1 channel information, with user equipment 2 using same resource block user equipment transmission power and The interference noise to user equipment 2 in addition to cell is estimated to each subcarrier of the every RB distributed by user equipment SINR historical measurements are modified, and calculate the SINR predicted value, such as formula (1.1b):

γ (t)=γ_measure(t-s)+λ(t)·[I(t-s)-I(t)]+[P(t)-P(t-s)] (1.1b)

Wherein, γ_measure(t-s) the SINR historical measurements for indicating the t-s of measurement arrive cell A1 by user equipment 2 Reference Signal Received Power and/or Reference Signal Received Quality, the transmission power of user equipment 2, user equipment 2 SINR go through History measured value is made using the user equipment of same resource block to the channel information of cell A1, with user equipment 2 with user equipment 2 Estimate to obtain with the interference noise to user equipment 2 except the transmission power and cell of the user equipment of same resource block , I (t-s) indicates the interference strength information of the t-s of measurement, and I (t) indicates corresponding when the t actual number predicted when current scheduling passes Interference strength information, λ (t) be currently safeguard SINR amendment weight, λ (t) > 0.As predict t be disturbed than t-s high, i.e., I (t) > I (t-T), then reduce SINR predicted value, if prediction t be disturbed is lower than t-s, then improves SINR predicted value.P (t) table Show the transmission power spectrum of prediction t, P (t-s) indicates the corresponding prediction transmission power spectrum of the t-s of test.

Then, the SINR of subcarrier is merged into RB grades of SINR γ_n, the SINR predicted value for user equipment is remerged, Merge formula and depends on the receiver used.It is calculated for example, by using formula (1.2).

It should be noted that the demodulated reference signal of user equipment transmission can be passed through in LTE communication system (DeModulation Reference Signal, DMRS) or detection reference signal (Sounding Reference Signal, SRS) measurement user equipment to multiple cells channel information, the channel information include Reference Signal Received Power, Reference Signal Received Quality and/or channel response estimation.

Further, the interference noise to user equipment 2 except cell is estimated, then it can be by tracking history Value is estimated, to obtain more accurately cooperation interference prediction.In order to estimate making an uproar except cell to the interference of user equipment 2 Sound estimation, needs to measure the total interference noise being an actually-received, and subtract the interference information of the cell of measurement.Due to nothing Method obtains the scheduling information outside cell, therefore filter value can be used as the residual interference noise outside actual number biography cell set Estimated value.For example, the interference of interference source and ambient noise to user equipment 2 except the collection of cooperation cell.

Step 406, the SINR value that user equipment 2 is obtained according to SINR predicted value and the adjustment of SINR adjustment amount.

Step 407, according to the corresponding relationship of SINR and MCS, determine MCS corresponding to the SINR value of user equipment 2.

Base station A selects user equipment 2 to need to be used using the corresponding relationship of SINR adjusted value inquiry SINR and MCS The MCS of selection is sent to user equipment 2 by MCS, in turn, cell A1, so that user equipment 2 is using modulation representated by the MCS The transmission of coding mode progress upstream data.It should be noted that the corresponding relationship between SINR Regulation mechanism, SINR and MCS It is identical with existing scheme.The modulation coding scheme of 3GPP protocol definition MCS0~MCS28 totally 29 ranks, respectively represents difference Modulation system and channel coding code rate, suitable MCS is selected according to different channel condition, makes wireless communication system throughput It maximizes.

Particularly, under the scene of cooperative multi-point (Coordinated Multiple Points, CoMP), interference source is pressed It is determined according to cooperative multi-point.For example, the cooperative multi-point of user equipment 2 is cell A1 and cell A2, then the interference source of user equipment 2 Just not only include the interference user equipment to cell A1, further include the interference user equipment to cell A2, on resource block n, uses Family equipment 6 be not only user equipment 2 cell A1 interference source and user equipment 2 cell A2 interference source.CoMP cooperation Multicast communication refers to the multiple transmission point separated on geographical location, and collaboration participates in joint and receives the data that a terminal is sent.

Moreover, the reception data of cooperation adjacent area are needed to wait for when cell A1 receives the data demodulation mistake of user equipment 2, The reception data of cooperation adjacent area can also postpone T TTI, and being equivalent to re-transmission and elongating from 8 TTI is 8+T TTI.

It should be noted that user equipment 1 is according to the resource block in the scheduling information that TTI N-T is got in TTI N Upper re-transmission.

The method of Adaptive Modulation and Coding described in the embodiment of the present invention, compared with the existing technology, by TTI N-T, Base station A determines scheduling information of the user equipment 2 in TTI N of cell A1, obtains cell A2 and cell in the TTI N, base station A B3 the user equipment that the TTI N-T is determining and is sent to base station A scheduling information, under non-ideal passback scene, energy Enough overcome the transmission delay for obtaining 2 disturbing factor of user equipment of cell A1 of other users equipment pair, considers that other users are set The standby disturbing factor to user equipment 2 improves the essence that base station calculates the SINR value of the scheduled user equipment 2 in current area Degree improves the accuracy of MCS selection to select MCS according to the SINR value, and then improves wireless communication system and handle up Rate.

Particularly, when T is equal to 0, i.e. the scheduling information that the cell A1 of base station A obtains the user equipment 5 of cell A2 can be with There is no time delay, TTI N-T is just TTI N, then base station A in TTI N, can determine the scheduling letter of the user equipment 2 of cell A1 The scheduling information of the user equipment 5 of breath and acquisition cell A2, thus when the resource block of user equipment 2 and the resource of user equipment 5 When block is identical, base station A obtains user equipment 2 in the measurement of metrical information and user equipment 5 in cell A1 in cell A1 Information；According to survey of the scheduling information and user equipment 5 of the metrical information of user equipment 2 and user equipment 2 in cell A1 The scheduling information of information and user equipment 5 is measured, base station A obtains the SINR predicted value of user equipment 2；Base station A is according to the SINR Predicted value and SINR adjustment amount obtain the SINR value of user equipment 2；Base station A is corresponding with modulation coding scheme MCS according to SINR Relationship determines MCS corresponding to the SINR value of user equipment 2.Described in the detailed step embodiment as above for predicting SINR value.Its In, cell A1 can directly acquire the scheduling of the user equipment 5 of cell A2 with the same base station belonging to cell A2, the base station Information.

The embodiment of the present invention provides a kind of base station 50, as shown in fig. 7, comprises:

Processing unit 501, in Transmission Time Interval TTI N-T, first base station to determine the first user of first community For equipment UE in the scheduling information of TTI N, the scheduling information includes the resource block and transmission power for the first UE distribution, In, in the TTI N, the first base station dispatches the first UE, the first base station belonging to the first community；

Acquiring unit 502, in the TTI N, the first base station to obtain the scheduling letter of the 2nd UE of second community It ceases, the second base station belonging to the second community, the scheduling information of the 2nd UE is tune of the 2nd UE in the TTI N Information is spent, the scheduling information of the 2nd UE is second base station in the TTI N-T determination and is sent to first base The scheduling information stood；

The acquiring unit 502 is also used to when the resource block of the first UE is identical as the resource block of the 2nd UE, The first base station obtains metrical information and twoth UE of the first UE in the first community described first Metrical information in cell；

The processing unit 501 be also used to according to the metrical information of the first UE and the scheduling information of the first UE with And the scheduling information of metrical information and twoth UE of the 2nd UE in first community, described in the first base station obtains The Signal to Interference plus Noise Ratio SINR predicted value of first UE；

The processing unit 501 is also used to the first base station and obtains institute according to the SINR predicted value and SINR adjustment amount State the SINR value of the first UE；

The processing unit 501 is also used to the first base station according to the corresponding relationship of SINR and modulation coding scheme MCS, Determine MCS corresponding to the SINR value of the first UE.

In one embodiment, the processing unit 501 is also used in TTI N-S, and the first base station obtains the 3rd UE In the retransmission information of the first community, the retransmission information includes the feedback that the 3rd UE needs to retransmit in the TTI N Information, the S are less than the T, and the T is the tune that the first community of the first base station obtains the 2nd UE of the second community Spend the time delay of information；

The processing unit 501 is also used in the TTI N, and the first base station determines the 3rd UE in the TTI N-T is not scheduled, and the 3rd UE is postponed scheduling dispatching cycle.

The processing unit 501 is specifically used for:

In another embodiment, the processing unit 501 is also used in TTI N-S, and the first base station obtains third UE the first community retransmission information, the retransmission information include the 3rd UE needs retransmitted in the TTI N it is anti- Feedforward information；

The processing unit 501 is also used in the TTI N-T, and the first base station determines that the 3rd UE of first community exists The scheduling information of the TTI N, the T are the tune that the first community of the first base station obtains the 2nd UE of the second community Spend the time delay of information；

As shown in figure 8, the base station 50 further include:

Transmission unit 503, in the TTI N, the first base station to send out uplink authorization UL to the 3rd UE Grant, wherein the new data instruction NDI in the UL Grant is not overturn, so that the 3rd UE uses adaptive retransmission side Formula is retransmitted.

The processing unit 501 is specifically used for:

Obtained on the resource block the first UE to the first community channel information, the first UE transmitting Power, the channel information of the 2nd UE to the first community, the transmission power of the 2nd UE and except described first small The interference noise to the first UE except area and the second community is estimated；

According to the channel information of the first UE to the first community, the transmission power of the first UE, described second UE is to the channel information of the first community, the transmission power of the 2nd UE and except the first community and described second small The interference noise to the first UE except area is estimated, the SINR predicted value is calculated, and the channel information includes that channel is rung It should estimate.

The processing unit 501 is specifically used for:

Obtained on the resource block the first UE to the first community channel information, the first UE transmitting Power, the SINR historical measurements of the first UE, the 2nd UE to the first community channel information, the 2nd UE Transmission power and the interference noise of the first UE is estimated in addition to the first community and the second community；

According to the channel information of the first UE to the first community, the transmission power of the first UE, described second UE is to the channel information of the first community, the transmission power of the 2nd UE and except the first community and described second small The SINR historical measurements that the first UE is corrected to the interference noise estimation of the first UE except area, calculate the SINR Predicted value, the channel information include Reference Signal Received Power and/or Reference Signal Received Quality.

Such as formula (1.1b):

γ (t)=γ_measure(t-s)+λ(t)·[I(t-s)-I(t)]+[P(t)-P(t-s)] (1.1b)

The embodiment of the present invention provides a kind of base station 60, as shown in Figure 9, comprising:

Processing unit 601, in Transmission Time Interval TTI N-T, first base station to determine the first user of first community For equipment UE in the scheduling information of TTI N, the scheduling information includes the resource block and transmission power for the first UE distribution, In, in the TTI N, the first base station dispatches the first UE, the first base station belonging to the first community；

The processing unit 601 is also used in TTI N-S, and it is small described first that the first base station obtains the first UE The retransmission information in area, the retransmission information include the feedback information that the first UE needs to retransmit in the TTI N；

Transmission unit 602, in the TTI N, the first base station to send out uplink authorization UL to the first UE Grant, wherein the new data instruction NDI in the UL Grant is not overturn, so that the first UE uses adaptive retransmission side Formula is retransmitted.

The embodiment of the present invention provides a kind of base station 70, as shown in Figure 10, comprising:

Memory 701, for storing program code；

Processor 702, for calling the program code of the memory storage to execute following method: in Transmission Time Interval TTI N-T, first base station determine scheduling information of first user equipment (UE) in TTI N of first community, the scheduling information packet Include the resource block and transmission power for the first UE distribution, wherein in the TTI N, the first base station scheduling described the One UE, the first base station belonging to the first community；

Receiver 703 is used in the TTI N, and the first base station obtains the scheduling information of the 2nd UE of second community, Second base station belonging to the second community, the scheduling information of the 2nd UE are scheduling of the 2nd UE in the TTI N Information, the scheduling information of the 2nd UE are second base station in the TTI N-T determination and are sent to the first base station Scheduling information；

The method that the processor 702 executes further include:

The processor 702 be also used to according to the metrical information of the first UE and the scheduling information of the first UE and The scheduling information of metrical information and twoth UE of 2nd UE in first community, the first base station obtain described the The Signal to Interference plus Noise Ratio SINR predicted value of one UE；

The processor 702 is also used to the first base station according to the SINR predicted value and the acquisition of SINR adjustment amount The SINR value of first UE；

The processor 702 is also used to the first base station according to the corresponding relationship of SINR and modulation coding scheme MCS, really MCS corresponding to the SINR value of fixed first UE.

The embodiment of the present invention provides a kind of base station 80, as shown in figure 11, comprising:

Memory 801, for storing program code；

Processor 802, for calling the program code of the memory storage to execute following method: in Transmission Time Interval TTI N-T, first base station determine scheduling information of first user equipment (UE) in TTI N of first community, the scheduling information packet Include the resource block and transmission power for the first UE distribution, wherein in the TTI N, the first base station scheduling described the One UE, the first base station belonging to the first community；

The processor 802 is also used in TTI N-S, and the first base station obtains the first UE in the first community Retransmission information, the retransmission information includes the feedback information that the first UE needs to retransmit in the TTI N；

Transmitter 803 is used in the TTI N, and the first base station sends out uplink authorization UL Grant to the first UE, Wherein the new data instruction NDI in the UL Grant is not overturn, carry out the first UE using in a manner of adaptive retransmission It retransmits.

It should be noted that processor is also used to execute the specific steps that user equipment needs to carry out transmitting uplink data, The description of method side can be referred to.The method of Adaptive Modulation and Coding of the present invention is suitable for the more scene of number of users In.

It is apparent to those skilled in the art that for convenience and simplicity of description, the device of foregoing description It with the specific work process of unit, can refer to corresponding processes in the foregoing method embodiment, details are not described herein.

In several embodiments provided herein, it should be understood that disclosed device and method can pass through it Its mode is realized.For example, the apparatus embodiments described above are merely exemplary, for example, the division of the unit, only Only a kind of logical function partition, there may be another division manner in actual implementation, such as multiple units or components can be tied Another system is closed or is desirably integrated into, or some features can be ignored or not executed.Another point, it is shown or discussed Mutual coupling, direct-coupling or communication connection can be through some interfaces, the INDIRECT COUPLING or logical of device or unit Letter connection can be electrical property, mechanical or other forms.The unit as illustrated by the separation member can be or can also be with It is not physically separated, component shown as a unit may or may not be physical unit, it can be located at one A place, or may be distributed over multiple network units.Part therein or complete can be selected according to the actual needs Portion unit achieves the purpose of the solution of this embodiment.

It, can also be in addition, the functional units in various embodiments of the present invention may be integrated into one processing unit It is that the independent physics of each unit includes, can also be integrated in one unit with two or more units.Above-mentioned integrated list Member both can take the form of hardware realization, can also realize in the form of hardware adds SFU software functional unit.

Those of ordinary skill in the art will appreciate that: realize that all or part of the steps of above method embodiment can pass through The relevant hardware of program instruction is completed, and program above-mentioned can be stored in a computer readable storage medium, the program When being executed, step including the steps of the foregoing method embodiments is executed；And storage medium above-mentioned includes: ROM, RAM, magnetic disk or light The various media that can store program code such as disk.The above description is merely a specific embodiment, but guarantor of the invention Shield range is not limited thereto, and anyone skilled in the art in the technical scope disclosed by the present invention, can be light It is readily conceivable that change or replacement, should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with described Subject to scope of protection of the claims.

Claims

1. a kind of method of Adaptive Modulation and Coding characterized by comprising

In Transmission Time Interval TTI N-T, first base station determines that scheduling of the first user equipment (UE) of first community in TTI N is believed Breath, the scheduling information include the resource block and transmission power for the first UE distribution, wherein in the TTI N, described the Dispatch the first UE, the first base station belonging to the first community in one base station；

In the TTI N, the first base station obtains the scheduling information of the 2nd UE of second community, belonging to the second community Second base station, the scheduling information of the 2nd UE are scheduling information of the 2nd UE in the TTI N, the tune of the 2nd UE To be second base station determining in the TTI N-T and is sent to the scheduling information of the first base station for degree information；Described second The scheduling information of UE includes the resource block and transmission power that second base station is the 2nd UE distribution；

When the resource block of the first UE is identical as the resource block of the 2nd UE, the first base station obtains the first UE The metrical information of metrical information and the 2nd UE in the first community in the first community；

According to the scheduling information and the 2nd UE of the metrical information of the first UE and the first UE in first community Metrical information and the 2nd UE scheduling information, the first base station obtains the signal and interference plus noise of the first UE Than SINR predicted value；

The first base station determines the SINR value institute of the first UE according to the corresponding relationship of SINR and modulation coding scheme MCS Corresponding MCS.

2. the method for Adaptive Modulation and Coding according to claim 1, which is characterized in that described in Transmission Time Interval TTI N-T, first base station determine the first user equipment (UE) of first community after the scheduling information of TTI N, and the method is also Include:

In TTI N-S, the first base station obtains the 3rd UE in the retransmission information of the first community, and the retransmission information includes 3rd UE needs the feedback information retransmitted in the TTI N, and the S is less than the T, and the T is the first base station First community obtains the time delay of the scheduling information of the 2nd UE of the second community；

In the TTI N, the first base station determines that the 3rd UE is not scheduled in the TTI N-T, by the third UE postpones scheduling dispatching cycle.

3. the method for Adaptive Modulation and Coding according to claim 2, which is characterized in that described to postpone the 3rd UE One dispatching cycle, which dispatches, includes:

When one dispatching cycle is 8 TTI, in TTI N+8-T, the first base station determines the 3rd UE of first community In the scheduling information of TTI N+8, in TTI N+8, the first base station sends out uplink authorization UL Grant to the 3rd UE, wherein New data instruction NDI in the UL Grant is not overturn, retransmit the 3rd UE using in a manner of adaptive retransmission.

4. the method for Adaptive Modulation and Coding according to claim 1, which is characterized in that the method also includes:

In TTI N-S, the first base station obtains the 3rd UE in the retransmission information of the first community, and the retransmission information includes 3rd UE needs the feedback information retransmitted in the TTI N；

In the TTI N-T, the first base station determines scheduling information of the 3rd UE in the TTI N of first community, the T For the first base station first community obtain the second community the 2nd UE scheduling information time delay；

In the TTI N, the first base station sends out uplink authorization UL Grant to the 3rd UE, wherein in the UL Grant New data instruction NDI do not overturn, retransmit the 3rd UE using in a manner of adaptive retransmission.

5. the method for Adaptive Modulation and Coding according to claim 3 or 4, which is characterized in that described according to described first Metrical information in first community of the metrical information of UE and the scheduling information and the 2nd UE of the first UE and described The scheduling information of 2nd UE, the SINR predicted value that the first base station obtains the first UE include:

The first UE is obtained to the first community on the resource block of the first UE or the resource block of the 2nd UE Channel information, the transmission power of the first UE, the channel information of the 2nd UE to the first community, the 2nd UE Transmission power and the interference noise to the first UE in addition to the first community and the second community are estimated；

It is arrived according to the first UE to the channel information of the first community, the transmission power of the first UE, the 2nd UE The channel information of the first community, the 2nd UE transmission power and except the first community and the second community it The outer interference noise to the first UE is estimated, calculates the SINR predicted value, the channel information includes that channel response is estimated Meter.

6. the method for Adaptive Modulation and Coding according to claim 3 or 4, which is characterized in that described according to described first Metrical information in first community of the metrical information of UE and the scheduling information and the 2nd UE of the first UE and described The scheduling information of 2nd UE, the SINR predicted value that the first base station obtains the first UE include:

The first UE is obtained to the first community on the resource block of the first UE or the resource block of the 2nd UE Channel information, the transmission power of the first UE, the SINR historical measurements of the first UE, the 2nd UE to described first The channel information of cell, the transmission power of the 2nd UE and in addition to the first community and the second community to institute State the interference noise estimation of the first UE；

It is arrived according to the first UE to the channel information of the first community, the transmission power of the first UE, the 2nd UE The channel information of the first community, the 2nd UE transmission power and except the first community and the second community it The outer SINR historical measurements that the first UE is corrected to the interference noise estimation of the first UE calculate the SINR prediction Value, the channel information includes Reference Signal Received Power and/or Reference Signal Received Quality.

7. a kind of method of Adaptive Modulation and Coding characterized by comprising

In TTI N-S, the first base station obtains the first UE in the retransmission information of the first community, the retransmission information The feedback information retransmitted in the TTI N is needed including the first UE；

In the TTI N, the first base station sends out uplink authorization UL Grant to the first UE, wherein in the UL Grant New data instruction NDI do not overturn, retransmit the first UE using in a manner of adaptive retransmission.

8. a kind of base station characterized by comprising

Processing unit, in Transmission Time Interval TTI N-T, first base station to determine that the first user equipment (UE) of first community exists The scheduling information of TTI N, the scheduling information include the resource block and transmission power for the first UE distribution, wherein in institute TTI N is stated, the first base station dispatches the first UE, the first base station belonging to the first community；

Acquiring unit, in the TTI N, the first base station to obtain the scheduling information of the 2nd UE of second community, described Second base station belonging to second community, the scheduling information of the 2nd UE are scheduling information of the 2nd UE in the TTI N, To be second base station determining in the TTI N-T and is sent to the scheduling of the first base station for the scheduling information of 2nd UE Information；The scheduling information of 2nd UE includes the resource block and transmission power that second base station is the 2nd UE distribution；

The acquiring unit is also used to when the resource block of the first UE is identical as the resource block of the 2nd UE, and described first Base station obtains metrical information and twoth UE of the first UE in the first community in the first community Metrical information；

The processing unit is also used to according to the metrical information of the first UE and the scheduling information of the first UE and described The scheduling information of metrical information and twoth UE of 2nd UE in first community, the first base station obtain the first UE Signal to Interference plus Noise Ratio SINR predicted value；

The processing unit is also used to the first base station and obtains described first according to the SINR predicted value and SINR adjustment amount The SINR value of UE；

The processing unit is also used to the first base station according to the corresponding relationship of SINR and modulation coding scheme MCS, determines institute State MCS corresponding to the SINR value of the first UE.

9. base station according to claim 8, which is characterized in that

The processing unit is also used in TTI N-S, and the first base station obtains the 3rd UE and believes in the re-transmission of the first community Breath, the retransmission information include the feedback information that the 3rd UE needs to retransmit in the TTI N, and the S is less than the T, institute State T be the first base station first community obtain the second community the 2nd UE scheduling information time delay；

The processing unit is also used in the TTI N, and the first base station determines that the 3rd UE does not have in the TTI N-T It is scheduled, the 3rd UE is postponed into scheduling dispatching cycle.

10. base station according to claim 9, which is characterized in that the processing unit is specifically used for:

11. base station according to claim 8, which is characterized in that

The processing unit is also used in TTI N-S, and the first base station obtains the 3rd UE and believes in the re-transmission of the first community Breath, the retransmission information include the feedback information that the 3rd UE needs to retransmit in the TTI N；

The processing unit is also used in the TTI N-T, and the first base station determines the 3rd UE of first community in the TTI The scheduling information of N, the T are the scheduling information that the first community of the first base station obtains the 2nd UE of the second community Time delay；

The base station further include:

Transmission unit is used in the TTI N, and the first base station sends out uplink authorization UL Grant to the 3rd UE, wherein New data instruction NDI in the UL Grant is not overturn, retransmit the 3rd UE using in a manner of adaptive retransmission.

12. base station described in 0 or 11 according to claim 1, which is characterized in that the processing unit is specifically used for:

13. base station described in 0 or 11 according to claim 1, which is characterized in that the processing unit is specifically used for:

14. a kind of base station characterized by comprising

The processing unit is also used in TTI N-S, and the first base station obtains the first UE in the weight of the first community Communication breath, the retransmission information include the feedback information that the first UE needs to retransmit in the TTI N；

Transmission unit is used in the TTI N, and the first base station sends out uplink authorization UL Grant to the first UE, wherein New data instruction NDI in the UL Grant is not overturn, retransmit the first UE using in a manner of adaptive retransmission.

15. a kind of base station characterized by comprising

Memory, for storing program code；

Processor, for calling the program code of the memory storage to execute following method: in Transmission Time Interval TTI N- T, first base station determine that scheduling information of first user equipment (UE) in TTI N of first community, the scheduling information include for institute State the resource block and transmission power of the first UE distribution, wherein in the TTI N, the first base station dispatches the first UE, institute State the first base station belonging to first community；

Receiver, in the TTI N, the first base station obtains the scheduling information of the 2nd UE of second community, and described the Second base station belonging to two cells, the scheduling information of the 2nd UE are scheduling information of the 2nd UE in the TTI N, institute To be second base station determining in the TTI N-T and is sent to the scheduling of first base station letter for the scheduling information for stating the 2nd UE Breath；The scheduling information of 2nd UE includes the resource block and transmission power that second base station is the 2nd UE distribution；

The method that the processor executes further include:

The processor is also used to according to the metrical information of the first UE and the scheduling information of the first UE and described The scheduling information of metrical information and twoth UE of two UE in first community, the first base station obtain the first UE's Signal to Interference plus Noise Ratio SINR predicted value；

The processor is also used to the first base station and obtains the first UE according to the SINR predicted value and SINR adjustment amount SINR value；

The processor is also used to the first base station according to the corresponding relationship of SINR and modulation coding scheme MCS, determine described in MCS corresponding to the SINR value of first UE.

16. base station according to claim 15, which is characterized in that

The processor is also used in TTI N-S, and the first base station obtains the 3rd UE in the retransmission information of the first community, The retransmission information includes the feedback information that the 3rd UE needs to retransmit in the TTI N, and the S is less than the T, the T For the first base station first community obtain the second community the 2nd UE scheduling information time delay；

The processor is also used in the TTI N, the first base station determine the 3rd UE the TTI N-T not by 3rd UE is postponed scheduling dispatching cycle by scheduling.

17. base station according to claim 16, which is characterized in that the processor is specifically used for:

18. base station according to claim 15, which is characterized in that

The processor is also used in TTI N-S, and the first base station obtains the 3rd UE in the retransmission information of the first community, The retransmission information includes the feedback information that the 3rd UE needs to retransmit in the TTI N；

The processor is also used in the TTI N-T, and the first base station determines the 3rd UE of first community in the TTI N Scheduling information, the T is the scheduling information that the first community of the first base station obtains the 2nd UE of the second community Time delay；

The base station further include:

Transmitter, in the TTI N, the first base station to send out uplink authorization UL Grant to the 3rd UE, wherein institute The new data instruction NDI stated in UL Grant is not overturn, retransmit the 3rd UE using in a manner of adaptive retransmission.

19. base station described in 7 or 18 according to claim 1, which is characterized in that the processor is specifically used for:

20. base station described in 7 or 18 according to claim 1, which is characterized in that the processor is specifically used for:

21. a kind of base station characterized by comprising

Memory, for storing program code；

The processor is also used in TTI N-S, and the first base station obtains the first UE in the re-transmission of the first community Information, the retransmission information include the feedback information that the first UE needs to retransmit in the TTI N；

Transmitter, in the TTI N, the first base station to send out uplink authorization UL Grant to the first UE, wherein institute The new data instruction NDI stated in UL Grant is not overturn, retransmit the first UE using in a manner of adaptive retransmission.