CN101841843A - Downlink transmission method, device and system of continuous packet connectivity technology - Google Patents

Downlink transmission method, device and system of continuous packet connectivity technology Download PDF

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CN101841843A
CN101841843A CN201010147370A CN201010147370A CN101841843A CN 101841843 A CN101841843 A CN 101841843A CN 201010147370 A CN201010147370 A CN 201010147370A CN 201010147370 A CN201010147370 A CN 201010147370A CN 101841843 A CN101841843 A CN 101841843A
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value
sinr
cqi
power
rtbs
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CN101841843B (en
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白杰
常永宏
周姣
赵训威
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Beijing Haiyun Technology Co. Ltd.
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New Postcom Equipment Co Ltd
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Abstract

The invention discloses a downlink transmission method, a device and a system of the continuous packet connectivity (CPC) technology. The method comprises the following steps: for each UE, calculating an actual normalized coding rate vr according to CQI which is submitted by the UE and determining SINRr which is used for indicating actual quality of a channel according to the vr; calculating a target normalized coding rate vt of the UE according to pre-allocated semi-persistent scheduling SPS resources and determining SINRt which is used for indicating target quality of the channel according to the vt; determining the power self-adaptive adjustment quantity of the UE according to the difference value of SINRt and SINRr; and determining downlink transmission power corresponding to the UE according to the power self-adaptive adjustment quantity of the UE. Power self-adaptive adjustment can be realized in the downlink transmission process.

Description

The downlink transmission method of continuous packet connectivity technology, device and system
Technical field
The present invention relates to the network communications technology, particularly relate to downlink transmission method, device and system in a kind of continuity grouping connection (CPC, Continuous Connectivity for Packet data) technology.
Background technology
The 3G system supports time division multiplexing (TDD, Time Division Duplex) and two kinds of standards of frequency division multiplexing (FDD, Frequency Division Duplex) to realize the use flexible and efficient to frequency spectrum resource simultaneously.FDD and TDD have introduced high-speed packet access enhancing (HSPA+ at 3GPP Release7 and Release8 in succession, High Speed PacketAccess Plus) technology, HSPA+ technology comprise that a plurality of technical characteristics: CPC, enhancing CELL FACH, multi-antenna technology (MIMO), 64QAM, L2 strengthen.
In the HSPA+ technology, CPC is mainly used in the transmission of optimizing small data packets, comprises Less mechanism and the control channel DRX mechanism of control channel HS-SCCH.The Less mechanism of HS-SCCH is mainly used in downlink transmission process, and purpose is in order to save the expense of control channel HS-SCCH.In the prior art, in the system of the Less mechanism that adopts CPC technology HS-SCCH, the process of downlink transfer mainly comprises:
It is High-Speed Physical Downlink Shared Channel (HS-PDSCH) distribution of transmission resource first that the mode of step 1, employing predefine resource is carried out down physical channel.
Here, the special-purpose predefine stock number of distribution is mainly considered the transmission demand of packet size, and big packet adopts the mode of dynamic dispatching to carry out resource allocation.
The predefine resource allocation process is called semi-continuous scheduling (SPS), and the predefine resource is also referred to as the SPS resource.Because this resource distribution mode has reduced the control channel expense, is called the Less mechanism of HS-SCCH.
Step 2, at the SPS reserved resource constantly, during the transmission business data packet, according to the size of business data packet, selection is a kind of from the 4 kinds of transmission block sizes (TBS) that set in advance on HS-PDSCH.
Step 3, according to the TBS that selects current business data packet of transmission on the HS-PDSCH code channel resource of reserving, solid size road power is divided equally according to gross power.
According to above description as can be seen, in the prior art, the power of HS-PDSCH is not adjusted in the CPC downlink transfer, promptly in each SPS resource cycle, no matter packet is much, all be to transmit, that is to say that the through-put power size can not change, can not carry out the self adaptation adjustment of power according to the code channel resource of reserving.Like this, when the variations in the actual environment, actual code rate variation but with the channel quality wide of the mark, can't change by adaptive channel fading, this can bring the low of efficiency of transmission, causes repeatedly to retransmit, and increases time delay, professional qos requirement is difficult to satisfy, and the efficiency of transmission of HS-PDSCH can't satisfy the error block rate requirement 10%.
Summary of the invention
The present invention proposes downlink transmission method, device and system in a kind of continuous packet connectivity technology, so that can in downlink transmission process, carry out the power adaptive adjustment.
In order to achieve the above object, technical scheme of the present invention is achieved in that
Downlink transmission method in a kind of continuous packet connectivity technology, this method comprises:
A, for each UE, the CQI that reports according to this UE calculates actual normalization code rate v r, according to this v rBe identified for the SINR of indicating channel actual mass r
B, according to pre-assigned semi-continuous scheduling SPS resource, calculate the target normalization code rate v of this UE t, according to this v tBe identified for the SINR of indicating channel aimed quality t
C, according to SINR tAnd SINR rDifference, determine the power adaptive adjustment amount of this UE;
D, according to the power adaptive adjustment amount of this UE, determine the power of the downlink transfer of this UE correspondence.
In the steps A, the described CQI that reports according to this UE calculates v rStep comprise:
The RTBS of A1, the described UE correspondence of calculating m
A2, calculating
Figure GSA00000067115700021
Wherein, Data cIt is the maximum number bits that the UE ability rating can carry.
In the steps A, described according to this v rDetermine SINR rStep comprise:
SINR that obtains from link simulation and the corresponding relation of different coding speed v, determine and v rCorresponding SINR r
Described steps A 1 comprises:
Whether judge the interval of time gap current time that described UE reports CQI for the last time greater than pre-set time interval GAP, if, then with the CQI of described UE correspondence mThe respective value of value when being defined as adopting 1/2 code rate and QPSK; If not, with CQI mValue be defined as the value of the CQI that described UE reports for the last time, perhaps,
Figure GSA00000067115700031
Wherein, p is a smoothing factor, 0≤p≤1, CQI M-1Value for the described UE inferior CQI that reports second from the bottom; With the CQI that determines mThe value of corresponding RTBS is as RTBS m
Perhaps,
The value of the CQI that reports according to described UE is at first searched the mapping table of CQI and RTBS, determines the value of the RTBS ' that the value of the CQI that reports with UE is corresponding, utilizes this RTBS ' to calculate the reflection CQI of UE correspondence then mRTBS mValue, computing formula is:
Figure GSA00000067115700032
Wherein, p is a smoothing factor, 0≤p≤1, RTBS M-1The value of the RTBS of the value correspondence of the CQI that time reports for described UE is second from the bottom.
Among the step B, the target normalization code rate v of described this UE of calculating tStep comprise: according to the first packet size that passes of the SPS of described UE, from pre-assigned various transmission block TBS sizes, select suitable TBS p,
Figure GSA00000067115700033
Wherein, Data tIt is the maximum number bits that the SPS reserved resource can carry;
Among the step B, described according to v tDetermine SINR tStep comprise: SINR that obtains from link simulation and the corresponding relation of different coding speed v, determine and v tCorresponding SINR t
Among the step C, the step of the power adaptive adjustment amount of described definite this UE comprises: with 10log N+SINR t-SINR rValue be defined as the power adaptive adjustment amount of this UE, wherein, N is the code channel number of described UE in time slot of this SPS resource;
Among the step D, the step of the power of the downlink transfer of described definite this UE correspondence comprises:
Calculate P t=P Normal+ 10logN+SINR t-SINR r, wherein, P NormalAverage solid size road power for transmission last time of the described UE correspondence that precomputes; With the P that calculates tValue be defined as the power of the downlink transfer of UE correspondence.
Among the step D, calculating P tValue after, and with P tValue be defined as further comprising before the power of downlink transfer of UE correspondence:
Calculate the P of other each UE correspondences t(k) value assigns or code channel resource assigns or power resource allocation finishes up to the user;
The power sum that all users of statistics preassignment code channel resource distribute
Figure GSA00000067115700041
If P Total＜P Max, then carry out described with the P that calculates tValue be defined as the power of the downlink transfer of UE correspondence; P MaxBe the maximum transmission power of base station support,
If P Total＞P Max, then calculate UE's
Figure GSA00000067115700042
With the P that finally obtains tValue be defined as the power of the downlink transfer of UE correspondence.
When running initially, trigger and carry out described steps A at new data packets of a UE execution;
And/or,
Described packet is for using any one professional packet of SPS resource.
Downlink transfer device in a kind of continuous packet connectivity technology comprises:
Channel actual mass computing module is used at each UE, and the CQI that reports according to this UE calculates actual normalization code rate v r, according to this v rBe identified for the SINR of indicating channel actual mass r
Channel aimed quality computing module is used for according to pre-assigned semi-continuous scheduling SPS resource, calculates the target normalization code rate v of this UE t, according to this v tBe identified for the SINR of indicating channel aimed quality t
The downlink transmission power determination module is used for according to SINR tAnd SINR rDifference, determine the power adaptive adjustment amount of this UE, and, determine the power of the downlink transfer of this UE correspondence according to the power adaptive adjustment amount of this UE.
Described channel actual mass computing module comprises: RTBS mCalculating sub module, v rCalculating sub module and SINR rCalculating sub module, wherein,
RTBS mCalculating sub module is calculated the RTBS of described UE correspondence mConcrete account form is:
Mode one, whether judge the interval of time gap current time that described UE reports CQI for the last time greater than pre-set time interval GAP, if, then with the CQI of described UE correspondence mThe respective value of value when being defined as adopting 1/2 code rate and QPSK; If not, with CQI mValue be defined as the value of the CQI that described UE reports for the last time, perhaps,
Figure GSA00000067115700051
Wherein, p is a smoothing factor, 0≤p≤1, CQI M-1Value for the described UE inferior CQI that reports second from the bottom; With the CQI that determines mThe value of corresponding RTBS is as RTBS mThe value of mode two, the CQI that reports according to described UE is at first searched the mapping table of CQI and RTBS, determines the value of the RTBS ' that the value of the CQI that reports with UE is corresponding, utilizes this RTBS then, calculates the reflection CQI of UE correspondence mRTBS mValue, computing formula is:
Figure GSA00000067115700052
Wherein, p is a smoothing factor, 0≤p≤1, RTBS M-1The value of the RTBS of the value correspondence of the CQI that time reports for described UE is second from the bottom;
v rCalculating sub module is calculated
Figure GSA00000067115700053
Data cIt is the maximum number bits that the UE ability rating can carry;
SINR rCalculating sub module SINR that obtains from link simulation and the corresponding relation of different coding speed v, is determined and v rThe v that calculating sub module calculates rCorresponding SINR r
Described channel aimed quality computing module comprises: transmission block is determined submodule, v tCalculating sub module and SINR tCalculating sub module, wherein,
Transmission block is determined submodule, is used for the first packet size that passes according to the SPS of described UE, selects suitable TBS from pre-assigned various transmission block TBS sizes p
v tCalculating sub module is used for determining the TBS that submodule calculates according to transmission block pCalculate
Figure GSA00000067115700061
Wherein, Data tIt is the maximum number bits that the SPS reserved resource can carry;
SINR tCalculating sub module is used for the SINR that obtains from link simulation and the corresponding relation of different coding speed v, determines and v tThe v that calculating sub module calculates tCorresponding SINR t
Described downlink transmission power determination module comprises: power adaptive adjustment amount calculating sub module and P tCalculating sub module, wherein,
Power adaptive adjustment amount calculating sub module is used for the N+SINR with 10log t-SINR rValue be defined as the power adaptive adjustment amount of this UE, wherein, N is the code channel number of described UE in time slot of this SPS resource;
P tCalculating sub module is used to calculate P t=P Normal+ 10logN+SINR t-SINR r, wherein, P NormalAverage solid size road power for transmission last time of the described UE correspondence that precomputes; And,
P tCalculating sub module is directly with the P that calculates tValue be defined as the power of the downlink transfer of UE correspondence; Perhaps, P tCalculating sub module is at first calculated the P of other each UE correspondences t(k) value assigns or code channel resource assigns or power resource allocation finishes up to the user; The power sum that all users of statistics preassignment code channel resource distribute
Figure GSA00000067115700062
If P Total＜P Max, then carry out described with the P that calculates tValue be defined as the power of the downlink transfer of UE correspondence; P MaxBe the maximum transmission power of base station support, if P Total＞P Max, then calculate UE's
Figure GSA00000067115700063
With the P that finally obtains tValue be defined as the power of the downlink transfer of UE correspondence.
This device is arranged in the base station, perhaps is newly-increased special equipment.
Downlink transmission system in a kind of continuous packet connectivity technology, this system comprises: the downlink transfer device in UE and any one continuous packet connectivity technology of the present invention.
This shows that in the present invention, the downlink transmission power of HS-PDSCH channel can be adjusted according to the channel actual mass that UE reports in the CPC downlink transfer, that is to say that the through-put power size carried out the self adaptation adjustment of power.Like this, when the variations in the actual environment, actual code rate variation can produce with channel quality and get in touch, come adaptive channel fading to change, improve efficiency of transmission, avoided repeatedly retransmitting, reduced time delay, professional qos requirement is met, and finally makes the efficiency of transmission first of HS-PDSCH channel satisfy 10% error block rate requirement.
Description of drawings
Fig. 1 is the downlink transfer flow chart in a specific embodiment of the present invention.
Fig. 2 is the basic structure schematic diagram of the downlink transfer device of continuous packet connectivity technology among the present invention.
Fig. 3 is a kind of structure chart of channel actual mass computing module inside in specific embodiment of the present invention.
Fig. 4 is a kind of structure chart of channel aimed quality computing module inside in specific embodiment of the present invention.
Fig. 5 is a kind of structure chart of downlink transmission power determination module inside in specific embodiment of the present invention.
Fig. 6 is the basic structure schematic diagram of system of the present invention.
Embodiment
In order to make the purpose, technical solutions and advantages of the present invention clearer, describe the present invention below in conjunction with the drawings and specific embodiments.
The present invention proposes the downlink transmission method in a kind of CPC technology, the core concept of this method comprises: for each UE, the CQI that reports according to this UE calculates actual normalization code rate v r, according to this v rBe identified for the SINR of indicating channel actual mass rAccording to pre-assigned semi-continuous scheduling SPS resource, calculate the target normalization code rate v of this UE t, according to this v tBe identified for the SINR of indicating channel aimed quality tAccording to SINR tAnd SINR rDifference, determine the power adaptive adjustment amount of this UE; According to the power adaptive adjustment amount of this UE, determine the power of the downlink transfer of this UE correspondence.
As seen, in the present invention, the downlink transmission power of HS-PDSCH channel can be adjusted according to the channel actual mass that UE reports in the CPC downlink transfer, that is to say that the through-put power size carried out the self adaptation adjustment of power.Like this, when the variations in the actual environment, actual code rate variation can produce with channel quality and get in touch, come adaptive channel fading to change, improve efficiency of transmission, avoided repeatedly retransmitting, reduced time delay, professional qos requirement is met, and the efficiency of transmission first of HS-PDSCH channel has satisfied 10% error block rate requirement.
Fig. 1 is the downlink transfer flow chart in a specific embodiment of the present invention.Referring to Fig. 1, in a specific implementation of the present invention, the downlink transmission process in the CPC technology mainly may further comprise the steps:
Step 101: adopt the mode of predefine resource carry out the HS-PDSCH channel first transfer resource be the distribution of SPS resource.
Here, the special-purpose predefine stock number of distributing is mainly considered the transmission demand of packet size, such as comprising the big small set of various (as 4 kinds or more kinds of) TBS in the SPS resource of distributing, the SPS reserved resource moment, the maximum number bits that the SPS reserved resource can carry etc.
Step 102: each UE regularly or according to system side triggers, and the channel quality indication (CQI) that self is obtained reports.
Step 103:, select the highest UE of current priority (to be designated as UE according to UE priority arrangement order k).
Step 104: judge UE kWhether the interval of time gap current time that reports CQI for the last time greater than pre-set time interval GAP, if, execution in step 105, otherwise, execution in step 106.
Step 105: with UE kCorresponding CQI mThe respective value of value when being defined as adopting 1/2 code rate and QPSK, execution in step 107.
Step 106: according to UE kThe value of the CQI that reports maps out UE kCorresponding CQI mValue.
The specific implementation process of this step can adopt multiple mapping mode, can be exemplified as:
Mode one, with UE kThe value of the CQI that reports for the last time is defined as corresponding CQI mValue.
Mode two, according to UE kThe value of the CQI that repeatedly the reports sliding filter value of making even.
In this mode two, a kind of preferred computational methods are
Figure GSA00000067115700091
Wherein, p is a smoothing factor, 0≤p≤1, CQI M-1Be described UE kThe value of the CQI that reports for second from the bottom time.
Above-mentioned dual mode just to this step implementation procedure for example, in the business realizing of reality, this step also exist other according to UE kThe value of the CQI that reports maps out UE kCorresponding CQI mThe method of value, such as, can require adjust according to practical business, as the value of getting the last CQI that reports for three times be weighted average etc. to the computing formula in the mode two.
Step 107: calculate UE kCorresponding actual normalization code rate v r
Actual normalization code rate v rReflected the code rate that satisfies actual channel conditions.
Just as is known to the person skilled in the art, any one CQI is included in two territories of feeding back on the HS-SICH channel: recommend transmission block size (RTBS) and recommend modulation system (RMF).
Therefore, in this step, can utilize the CQI that calculates mSearch the mapping table of CQI and RTBS, obtain corresponding to CQI mRTBS m, and further utilize this RTBS mCalculate the actual normalization code rate v that can reflect that actual channel requires rA kind of preferred computing formula is:
Figure GSA00000067115700092
Wherein, Data cBe UE kThe maximum number bits that ability rating can carry.
Need to prove that above-mentioned steps 106 is at first to calculate UE to step 107 kCQI m, tabling look-up then obtains UE kCorresponding RTBS mValue.In the business realizing of reality, also can adopt other flexible implementations to obtain RTBS mValue, such as,
The step of above-mentioned steps 106 can accommodation be: according to UE kThe value of the CQI that reports is at first searched the mapping table of CQI and RTBS, thereby is determined and UE kThe value of the RTBS ' of the value correspondence of the CQI that reports utilizes this RTBS ' to calculate UE then kCorresponding reflection CQI mRTBS mValue, computing formula can for:
Figure GSA00000067115700101
Wherein, p is a smoothing factor, 0≤p≤1, RTBS M-1Be described UE kThe value of the RTBS of the value correspondence of the CQI that reports for second from the bottom time.Like this, in the above-mentioned steps 107, then can directly utilize formula
Figure GSA00000067115700102
Calculate UE kCorresponding actual normalization code rate v r
Step 108: according to UE kCorresponding v rBe identified for the SINR of indicating channel actual mass r
The ability of each equipment itself just can realize obtaining by link simulation the BLER curve of SINR and different coding speed v.Like this, in this step, can determine and UE by the SINR of this curve embodiment and the corresponding relation of different coding speed v kV rCorresponding SINR r
Certainly, in practical business implementation procedure of the present invention, also can adopt additive method to determine SINR r, such as, come according to UE by predefined formula such as weighting formula kCorresponding v rDetermine SINR r
Need to prove,, then realized determining the influence of actual channel decline transmission quality according to the CQI of UE feedback by the processing of above-mentioned steps 104 to step 108.
Step 109: for the UE that is about to carry out kFirst biography of SPS, according to the current size that needs the business data packet that transmits, from the big small set of various TBS that sets in advance, select suitable TBS p
Here, select TBS pMethod include but not limited to following mode:
Mode A, according to the size of the current business data packet that need to transmit, from the big small set of various TBS that sets in advance, select big or small immediate TBS with this business data packet as TBS p, that is to say the TBS that selects pSize and the difference minimum of the size of business data packet.
Mode B, from the big small set of various TBS that sets in advance, select greater than the current minimum TBS of the business data packet size that transmits that needs as TBS p
In the business realizing of reality, select TBS pMethod also can require to specify arbitrarily according to practical business.
Step 110: calculate UE kCorresponding target normalization code rate v t
Target normalization code rate v tThe code rate that has reflected system requirements.In this step, a kind of preferred calculating v tMethod be: Wherein, Data tIt is the maximum number bits that the SPS reserved resource can carry.
Step 111: according to UE kCorresponding v tBe identified for the SINR of indicating channel aimed quality t
System equipment producer can obtain the BLER curve of SINR and different coding speed v by the computer link simulation.Like this, in this step, can determine and UE by the SINR of this curve embodiment and the corresponding relation of different coding speed v kV tCorresponding SINR t
Certainly, in practical business implementation procedure of the present invention, also can adopt additive method to determine SINR t, such as, come according to UE by predefined formula such as weighting formula kCorresponding v tDetermine SINR t
Need to prove,, then realized presorting code rate and the corresponding object transmission quality requirement that the SPS time-slot code channel resource for preparing determines to satisfy target call according to business data packet size and high level by the processing of above-mentioned steps 109 to step 111.
Step 112: according to SINR tAnd SINR rDifference, determine this UE kThe power adaptive adjustment amount.
The processing of this step is determined the power adaptive adjustment amount according to aimed quality demand and actual channel transmission quality difference in fact exactly.
The specific implementation process of this step can comprise: calculate Δ SINR=SINR t-SINR r, above-mentioned SINR is the dB value.UE kCode channel number in 1 time slot of this SPS resource is N, then this UE kThe power adaptive adjustment amount preferably can be 10log N+SINR t-SINR r
Step 113: determine UE kThe pre-transmitting power P of corresponding downlink transfer t
Here, pre-transmitting power P tA kind of computing formula preferably can for:
P t=P Normal+ 10log (N)+Δ SINR (dBm), wherein, P NormalBe UE kThe average solid size road power of transmission last time, be the mean value of the many code channels of multi-slot, why be normalized to solid size road power, after purpose is to adopt power adaptive to adjust, power when same user accounts for a plurality of time slot may and inequality, after considering the code interleaving randomization, systematic bits can be thought uniform distribution on a plurality of time slots, and UE is related with the performance number foundation after the normalization at the SINR that measures calculating.
Step 114: according to the pre-transmitting power P of other each UE correspondences t(k) value is finally determined current UE kThe transmitting power of corresponding downlink transfer.
In a preferred implementation of the present invention, need the overall situation to consider the distribution of each UE downlink transmission power and the equilibrium between the system resource.Therefore, can utilize the process of this step to come to UE kThe pre-transmitting power of corresponding downlink transfer is adjusted and is finally determined preferred UE kThe transmitting power of corresponding downlink transfer.At this moment, a kind of preferred implementation procedure of this step 114 specifically comprises:
Step 1141:, calculate the pre-transmitting power P of other each UE correspondences according to the principle process of step 104 to step 113 t(k) value assigns or code channel resource assigns or power resource allocation finishes up to the user.
Step 1142: the power sum that all UE of statistics preassignment code channel resource distribute
Figure GSA00000067115700121
(linear value).
Step 1143: judge whether to satisfy P Total＜P Max, wherein, P MaxBe the maximum transmission power of base station support, if, then, execution in step 1144, otherwise, execution in step 1145.
Step 1144: with UE kThe pre-transmitting power P of corresponding downlink transfer tValue directly as UE kThe transmitting power of corresponding downlink transfer finishes the processing procedure of current step 114.
Step 1145: each UE all carries out
Figure GSA00000067115700131
(linear value) is with the UE that finally obtains kP tValue be defined as UE kThe transmitting power of corresponding downlink transfer.
Here, each UE P that all will obtain according to this step computing formula tValue be defined as the transmitting power of the actual downstream transmission of self correspondence, like this, the actual gross power of each UE is zoomed in the scope of permission, satisfied system requirements.
So far, the processing procedure of step 114 finishes.
Step 115: according to the final UE that determines kThe transmitting power of corresponding downlink transfer is carried out the transmission of business data packet.
After this, determine, that is to say for the first downlink transmission power that carries out follow-up new business packet, at handle next time, after this step, all right further average solid size road power P of the many code channels of each user's multi-slot of update calculation Normal
Need to prove,,, thereby make the downlink transmission power of UE can carry out the power adaptive adjustment, adaptive channel variation all according to above-mentioned flow performing single treatment shown in Figure 1 whenever carrying out a new business packet at UE when first.
The present invention has also proposed the downlink transfer device in a kind of CPC technology simultaneously, and referring to Fig. 2, the basic structure and the function of this device comprise:
Channel actual mass computing module is used at each UE, and the CQI that reports according to this UE calculates actual normalization code rate v r, according to this v rBe identified for the SINR of indicating channel actual mass r
Channel aimed quality computing module is used for according to pre-assigned semi-continuous scheduling SPS resource, calculates the target normalization code rate v of this UE t, according to this v tBe identified for the SINR of indicating channel aimed quality t
The downlink transmission power determination module is used for according to SINR tAnd SINR rDifference, determine the power adaptive adjustment amount of this UE, and, determine the power of the downlink transfer of this UE correspondence according to the power adaptive adjustment amount of this UE.
Fig. 3 is a kind of structure chart of channel actual mass computing module inside in specific embodiment of the present invention, and referring to Fig. 3, a kind of structure and the concrete function of channel actual mass computing module inside comprise: RTBS mCalculating sub module, v rCalculating sub module and SINR rCalculating sub module, wherein,
RTBS mCalculating sub module is calculated the RTBS of described UE correspondence mConcrete account form is:
Mode one, whether judge the interval of time gap current time that described UE reports CQI for the last time greater than pre-set time interval GAP, if, then with the CQI of described UE correspondence mThe respective value of value when being defined as adopting 1/2 code rate and QPSK; If not, with CQI mValue be defined as the value of the CQI that described UE reports for the last time, perhaps,
Figure GSA00000067115700141
Wherein, p is a smoothing factor, 0≤p≤1, CQI M-1Value for the described UE inferior CQI that reports second from the bottom; With the CQI that determines mThe value of corresponding RTBS is as RTBS mThe value of mode two, the CQI that reports according to described UE is at first searched the mapping table of CQI and RTBS, determines the value of the RTBS ' that the value of the CQI that reports with UE is corresponding, utilizes this RTBS ' to calculate the reflection CQI of UE correspondence then mRTBS mValue, computing formula is:
Figure GSA00000067115700142
Wherein, p is a smoothing factor, 0≤p≤1, RTBS M-1The value of the RTBS of the value correspondence of the CQI that time reports for described UE is second from the bottom;
v rCalculating sub module is calculated Data cIt is the maximum number bits that the UE ability rating can carry;
SINR rCalculating sub module SINR that obtains from link simulation and the corresponding relation of different coding speed v, is determined and v rThe v that calculating sub module calculates rCorresponding SINR r
Fig. 4 is a kind of structure chart of channel aimed quality computing module inside in specific embodiment of the present invention.Referring to Fig. 4, a kind of structure of channel aimed quality computing module comprises: transmission block is determined submodule, v tCalculating sub module and SINR tCalculating sub module, wherein,
Transmission block is determined submodule, is used for the first packet size that passes according to the SPS of described UE, selects suitable TBS from pre-assigned various transmission block TBS sizes p
v tCalculating sub module is used for determining the TBS that submodule calculates according to transmission block pCalculate Wherein, Data tIt is the maximum number bits that the SPS reserved resource can carry;
SINR tCalculating sub module is used for the SINR that obtains from link simulation and the corresponding relation of different coding speed v, determines and v tThe v that calculating sub module calculates tCorresponding SINR t
Fig. 5 is a kind of structure chart of downlink transmission power determination module inside in specific embodiment of the present invention.Referring to Fig. 5, a kind of structure of downlink transmission power determination module comprises: power adaptive adjustment amount calculating sub module and P tCalculating sub module, wherein,
Power adaptive adjustment amount calculating sub module is used for the N+SINR with 10log t-SINR rValue be defined as the power adaptive adjustment amount of this UE, wherein, N is the code channel number of described UE in time slot of this SPS resource;
P tCalculating sub module is used to calculate P t=P Normal+ 10logN+SINR t-SINR r, wherein, P NormalAverage solid size road power for transmission last time of the described UE correspondence that precomputes; And,
P tCalculating sub module is directly with the P that calculates tValue be defined as the power of the downlink transfer of UE correspondence; Perhaps, P tCalculating sub module is at first calculated the P of other each UE correspondences t(k) value assigns or code channel resource assigns or power resource allocation finishes up to the user; The power sum that all users of statistics preassignment code channel resource distribute If P Total＜P Max, then carry out described with the P that calculates tValue be defined as the power of the downlink transfer of UE correspondence; P MaxBe the maximum transmission power of base station support, if P Total＞P Max, then calculate UE's With the P that finally obtains tValue be defined as the power of the downlink transfer of UE correspondence.
Downlink transfer device in the CPC technology that the present invention proposes can adopt multiple mode to realize, such as, this device is arranged in the base station, promptly is a functional device of inside of base station, and perhaps, this device is independent of legacy network equipment etc. for newly-increased special equipment.
In addition, the present invention has also proposed the downlink transmission system in a kind of CPC technology simultaneously, and this system comprises: the downlink transfer device in UE and any one CPC technology of the present invention described above.
Need to prove that in the present invention, business data packet can be to use any one professional packet of SPS resource, such as being VoIP packet or gaming packet etc.
The above only is preferred embodiment of the present invention, and is in order to restriction the present invention, within the spirit and principles in the present invention not all, any modification of being made, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.

Claims (13)

1. the downlink transmission method in the continuous packet connectivity technology is characterized in that this method comprises:
A, for each UE, the CQI that reports according to this UE calculates actual normalization code rate v r, according to this v rBe identified for the SINR of indicating channel actual mass r
B, according to pre-assigned semi-continuous scheduling SPS resource, calculate the target normalization code rate v of this UE t, according to this v tBe identified for the SINR of indicating channel aimed quality t
C, according to SINR tAnd SINR rDifference, determine the power adaptive adjustment amount of this UE;
D, according to the power adaptive adjustment amount of this UE, determine the power of the downlink transfer of this UE correspondence.
2. method according to claim 1 is characterized in that,
In the steps A, the described CQI that reports according to this UE calculates v rStep comprise:
The RTBS of A1, the described UE correspondence of calculating m
A2, calculating
Figure FSA00000067115600011
Wherein, Data cIt is the maximum number bits that the UE ability rating can carry.
In the steps A, described according to this v rDetermine SINR rStep comprise:
SINR that obtains from link simulation and the corresponding relation of different coding speed v, determine and v rCorresponding SINR r
3. method according to claim 2 is characterized in that, described steps A 1 comprises:
Whether judge the interval of time gap current time that described UE reports CQI for the last time greater than pre-set time interval GAP, if, then with the CQI of described UE correspondence mThe respective value of value when being defined as adopting 1/2 code rate and QPSK; If not, with CQI mValue be defined as the value of the CQI that described UE reports for the last time, perhaps,
Figure FSA00000067115600012
Wherein, p is a smoothing factor, 0≤p≤1, CQI M-1Value for the described UE inferior CQI that reports second from the bottom; With the CQI that determines mThe value of corresponding RTBS is as RTBS m
Perhaps,
The value of the CQI that reports according to described UE is at first searched the mapping table of CQI and RTBS, determines the value of the RTBS ' that the value of the CQI that reports with UE is corresponding, utilizes this RTBS ' to calculate the reflection CQI of UE correspondence then mRTBS mValue, computing formula is:
Figure FSA00000067115600021
Wherein, p is a smoothing factor, 0≤p≤1, RTBS M-1The value of the RTBS of the value correspondence of the CQI that time reports for described UE is second from the bottom.
4. method according to claim 1 is characterized in that,
Among the step B, the target normalization code rate v of described this UE of calculating tStep comprise: according to the first packet size that passes of the SPS of described UE, from pre-assigned various transmission block TBS sizes, select suitable TBS p,
Figure FSA00000067115600022
Wherein, Data tIt is the maximum number bits that the SPS reserved resource can carry;
Among the step B, described according to v tDetermine SINR tStep comprise: SINR that obtains from link simulation and the corresponding relation of different coding speed v, determine and v tCorresponding SINR t
5. method according to claim 1 is characterized in that,
Among the step C, the step of the power 1 self adaptation adjustment amount of described definite this UE comprises: with 10logN+SINR t-SINR rValue be defined as the power adaptive adjustment amount of this UE, wherein, N is the code channel number of described UE in time slot of this SPS resource;
Among the step D, the step of the power of the downlink transfer of described definite this UE correspondence comprises:
Calculate P t=P Normal+ 10log N+SINR t-SINR r, wherein, P NormalAverage solid size road power for transmission last time of the described UE correspondence that precomputes; With the P that calculates tValue be defined as the power of the downlink transfer of UE correspondence.
6. method according to claim 5 is characterized in that, among the step D, is calculating P tValue after, and with P tValue be defined as further comprising before the power of downlink transfer of UE correspondence:
Calculate the P of other each UE correspondences t(k) value assigns or code channel resource assigns or power resource allocation finishes up to the user;
The power sum that all users of statistics preassignment code channel resource distribute P total = Σ k P t ( k ) ;
If P Total＜P Max, then carry out described with the P that calculates tValue be defined as the power of the downlink transfer of UE correspondence; P MaxBe the maximum transmission power of base station support,
If P Total＞P Max, then calculate UE's
Figure FSA00000067115600032
With the P that finally obtains tValue be defined as the power of the downlink transfer of UE correspondence.
7. according to any described method in the claim 1 to 6, it is characterized in that,
When running initially, trigger and carry out described steps A at new data packets of a UE execution;
And/or,
Described packet is for using any one professional packet of SPS resource.
8. the downlink transfer device in the continuous packet connectivity technology is characterized in that, comprising:
Channel actual mass computing module is used at each UE, and the CQI that reports according to this UE calculates actual normalization code rate v r, according to this v rBe identified for the SINR of indicating channel actual mass r
Channel aimed quality computing module is used for according to pre-assigned semi-continuous scheduling SPS resource, calculates the target normalization code rate v of this UE t, according to this v tBe identified for the SINR of indicating channel aimed quality t
The downlink transmission power determination module is used for according to SINR tAnd SINR rDifference, determine the power adaptive adjustment amount of this UE, and, determine the power of the downlink transfer of this UE correspondence according to the power adaptive adjustment amount of this UE.
9. device according to claim 8 is characterized in that, described channel actual mass computing module comprises: RTBS mCalculating sub module, v rCalculating sub module and SINR rCalculating sub module, wherein,
RTBS mCalculating sub module is calculated the RTBS of described UE correspondence mConcrete account form is:
Mode one, whether judge the interval of time gap current time that described UE reports CQI for the last time greater than pre-set time interval GAP, if, then with the CQI of described UE correspondence mThe respective value of value when being defined as adopting 1/2 code rate and QPSK; If not, with CQI mValue be defined as the value of the CQI that described UE reports for the last time, perhaps,
Figure FSA00000067115600041
Wherein, p is a smoothing factor, 0≤p≤1, CQI M-1Value for the described UE inferior CQI that reports second from the bottom; With the CQI that determines mThe value of corresponding RTBS is as RTBS mThe value of mode two, the CQI that reports according to described UE is at first searched the mapping table of CQI and RTBS, determines the value of the RTBS ' that the value of the CQI that reports with UE is corresponding, utilizes this RTBS ' to calculate the reflection CQI of UE correspondence then mRTBS mValue, computing formula is: Wherein, p is a smoothing factor, 0≤p≤1, RTBS M-1The value of the RTBS of the value correspondence of the CQI that time reports for described UE is second from the bottom;
v rCalculating sub module is calculated Data cIt is the maximum number bits that the UE ability rating can carry;
SINR rCalculating sub module SINR that obtains from link simulation and the corresponding relation of different coding speed v, is determined and v rThe v that calculating sub module calculates rCorresponding SINR r
10. device according to claim 8 is characterized in that, described channel aimed quality computing module comprises: transmission block is determined submodule, v tCalculating sub module and SINR tCalculating sub module, wherein,
Transmission block is determined submodule, is used for the first packet size that passes according to the SPS of described UE, selects suitable TBS from pre-assigned various transmission block TBS sizes p
v tCalculating sub module is used for determining the TBS that submodule calculates according to transmission block pCalculate
Figure FSA00000067115600051
Wherein, Data tIt is the maximum number bits that the SPS reserved resource can carry;
SINR tCalculating sub module is used for the SINR that obtains from link simulation and the corresponding relation of different coding speed v, determines and v tThe v that calculating sub module calculates tCorresponding SINR t
11. according to Claim 8,9 or 10 described devices, it is characterized in that described downlink transmission power determination module comprises: power adaptive adjustment amount calculating sub module and P tCalculating sub module, wherein,
Power adaptive adjustment amount calculating sub module is used for 10logN+SINR t-SINR rValue be defined as the power adaptive adjustment amount of this UE, wherein, N is the code channel number of described UE in time slot of this SPS resource;
P tCalculating sub module is used to calculate P t=P Normal+ 10logN+SINR r-SINR r, wherein, P NormalAverage solid size road power for transmission last time of the described UE correspondence that precomputes; And, P tCalculating sub module is directly with the P that calculates tValue be defined as the power of the downlink transfer of UE correspondence; Perhaps, P tCalculating sub module is at first calculated the P of other each UE correspondences t(k) value assigns or code channel resource assigns or power resource allocation finishes up to the user; The power sum that all users of statistics preassignment code channel resource distribute
Figure FSA00000067115600052
If P Total＜P Max, then carry out described with the P that calculates tValue be defined as the power of the downlink transfer of UE correspondence; P MaxBe the maximum transmission power of base station support, if P Total＞P Max, then calculate UE's
Figure FSA00000067115600053
With the P that finally obtains tValue be defined as the power of the downlink transfer of UE correspondence.
12. any described device in 11 is characterized in that this device is arranged in the base station according to Claim 8, perhaps is newly-increased special equipment.
13. the downlink transmission system in the continuous packet connectivity technology is characterized in that this system comprises: UE and as the downlink transfer device in any described continuous packet connectivity technology in the claim 8 to 12.
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