CN102056178B - Interference coordination method among cells and a basestation - Google Patents

Abstract

The invention discloses an interference coordination method among cells and an evolved NodeB (eNB), belonging to the technical field of mobile communication. The technical scheme of the invention is as follows: a path loss compensation scaling factor k(i) is defined; k(i) is calculated handed down to user equipment (UE) by the eNB; and when calculating the transmitted power of an uplink traffic channel, the UE scales an original path loss compensation factor alpha according to the k(i), so that the update frequency of the actual path loss compensation factor is improved, thus the UE can respond to changes of edge cases of the cell and neighboring cells in time, thereby improving the system performance.

Description

A kind of disturbance coordination method of minizone and a kind of base station

Technical field

The present invention relates to the mobile communication technology field, particularly relate to a kind of disturbance coordination method and a kind of base station of minizone.

Background technology

Long Term Evolution (LTE, Long Term Evolution) system adopts flat network configuration.Fig. 1 is the LTE network structure.As shown in Figure 1, the universal mobile telecommunications system wireless access network of evolution (E-UTRAN, Evolved Universal Terrestrial Radio AccessNetwork) is made of base station (eNB, evolved NodeB), is interconnected by X2 interface between the eNB; (Evolved Packet Corenet work EPC) comprises gateway (S-GW, Serving Gateway) and Mobility Management Entity (MME, Mobility Management Entity) to Evolved Packet Core, and is mutual by S 1 interface and eNB.Wherein each eNB comprises a plurality of residential quarters.

In the LTE system based on OFDM (OFDM, Orthogonal Frequency DivisionMultiplexing), influence the main interference of systematic function from presence of intercell interference.Therefore Inter-Cell Interference Coordination (ICIC) technology is one of effective means that improves systematic function.The ICIC technology is by managing Radio Resource, the interference level of minizone is remained under the controlled state, especially in the cell boarder area, need do some special management to Radio Resource, to satisfy the lifting demand of LTE system cell edge customer quality of service.Inter-Cell Interference Coordination is a kind of many cell radio resources management function in essence, and it need consider to use state information and business load state information from the resource of a plurality of residential quarters simultaneously.

In the design of LTE system to uplink power control, also added the consideration to ICIC.The transmitted power P of reverse link traffic channel _PUSCH(i) be expressed as:

P _PUSCH(i)＝min{P _MAX，10log ₁₀(M _PUSCH(i))+P _{O_PUSCH}(j)+α·PL+Δ _TF(i)+f(i)} (1)

The implication of formula (1) is the transmitted power P of reverse link traffic channel _PUSCH(i) get P _MAXAnd 10log ₁₀(M _PUSCH(i))+P _{O_PUSCH}(j)+α PL+ Δ _TF(i)+f (i) in less value.Wherein, i represents subframe, and j represents type of data packet in the residential quarter, has three types in practice; P _MAXBe maximum allowable power; M _PUSCH(i) be reverse link traffic channel PUSCH transfer bandwidth, be expressed as the Resource Block number; P _{O_PUSCH}(j) comprise residential quarter certain nominal power and UE certain nominal power excursion two parts; PL is descending path loss estimated value (following walking along the street is here decreased estimated value and is used as up path loss estimation); Δ _TF(i) be power offset based on modulation coding mode (MSC, Modulation andCoding Scheme) and data type, can be so that UE dynamically adjusts corresponding transmit power spectral density according to selected MC S; F (i) has represented the closed loop adjustment member of power control, and eNB orders by the TPC in the physical downlink control channel PDCCH transmitting power of UE is adjusted, and can be divided into accumulation adjustment and absolute value and adjust dual mode.α is road loss compensation factor, and α ∈ { 0,0.4,0.5,0.6,0.7,0.8,0.9,1}.

Road loss compensation factor α is by eNB semi-static configuration in system message, in general, for the bigger residential quarter of radius, cover limited, when presence of intercell interference is not principal element simultaneously, the α value is 1, carry out full remuneration, residential quarter certain power fiducial value is got littler, makes to disturb to promote (IoT, Interference over Thermal) lower, guarantee that cell edge covers.More for number of users, when presence of intercell interference becomes principal element, the α value is less than 1, carries out the part compensation, residential quarter certain power fiducial value is got greatly, makes IoT higher, raising Cell Center User speed, the total throughput in raising residential quarter.

But in existing scheme, because road loss compensation factor α is semi-static configuration, regulating cycle is longer, can not be in time the change of this residential quarter and adjacent cell edge situation be responded.For example, this residential quarter/adjacent Cell Edge User number was less originally, thought that presence of intercell interference is less, and the α value arranges bigger; When this Cell Edge User increases, α value as can not in time adjust will increase the interference of adjacent residential quarter, causes systematic function to descend, and vice versa.

Although the problems referred to above can be improved by changing UE certain nominal power excursion, need high level (E-UTRAN) to connect reconfiguration message by RRC, carry the uplink power control dedicated signaling and indicate to UE, signaling consumption is bigger.In addition, for first biography (adopt Resource Allocation Formula, do not carry out dynamic dispatching) and the non-self-adapting re-transmission thereof of up non-self-adapting re-transmission and semi-continuous scheduling, when presence of intercell interference changed, it is more serious that α can not in time adjust the problem of bringing.

In sum, owing to influence the road loss compensation factor α of transmitted power of reverse link traffic channel by being semi-static configuration, can not upgrade in time, therefore can not make response to the change of this residential quarter and adjacent cell edge situation in time, cause systematic function to descend.

Summary of the invention

The invention provides a kind of disturbance coordination method of minizone, this method makes UE to make response to the change of this residential quarter and adjacent cell edge situation in time, has improved systematic function.

The present invention also provides a kind of base station eNB, and this eNB makes UE to make response to the change of this residential quarter and adjacent cell edge situation in time, has improved systematic function.

For achieving the above object, technical scheme of the present invention is achieved in that

The invention discloses a kind of disturbance coordination method of minizone, it is characterized in that, this method comprises:

Base station eNB is calculated path loss compensation contraction factor k (i), and k (i) is sent to user equipment (UE);

UE calculates the transmitted power P of reverse link traffic channel according to following formula _PUSCH(i):

P _PUSCH(i)=min{P _MAX, 10log ₁₀(M _PUSCH(i))+P _{O_PUSCH}(j)+(α+k (i)) PL+ Δ _TF(i)+and f (i) } wherein, i represents subframe, j represents type of data packet in the residential quarter; P _MAXBe maximum allowable power; M _PUSCH(i) be reverse link traffic channel PUSCH transfer bandwidth; P _{O_PUSCH}(j) comprise residential quarter certain nominal power and UE certain nominal power excursion two parts; PL is descending path loss estimated value; Δ _TF(i) be power offset based on modulation coding mode and data type; F (i) represents the closed loop adjustment member of power control; α is road loss compensation factor, and k (i) is the path loss compensation contraction factor;

UE is according to the transmitted power P of the reverse link traffic channel that calculates _PUSCH(i), send uplink business data at subframe i.

The present invention also provides a kind of base station eNB, it is characterized in that, this eNB comprises: computing module and issue module, wherein:

Computing module be used for to calculate path loss compensation contraction factor k (i), and k (i) sent to issues module;

Issue module, be used for k (i) is sent to user equipment (UE);

Wherein, after UE receives k (i), calculate the transmitted power P of reverse link traffic channel according to following formula _PUSCH(i), and according to the P that calculates _PUSCH(i), send uplink business data at subframe i:

P _PUSCH(i)=min{P _MAX, 10log ₁₀(M _PUSCH(i))+P _{O_PUSCH}(j)+(α+k (i)) PL+ Δ _TF(i)+and f (i) } wherein, i represents subframe, j represents type of data packet in the residential quarter; P _MAXBe maximum allowable power; M _PUSCH(i) be reverse link traffic channel PUSCH transfer bandwidth; P _{O_PUSCH}(j) comprise residential quarter certain nominal power and UE certain nominal power excursion two parts; PL is descending path loss estimated value; Δ _TF(i) be power offset based on modulation coding mode and data type; F (i) represents the closed loop adjustment member of power control; α is road loss compensation factor, and k (i) is the path loss compensation contraction factor.

By as seen above-mentioned, this definition path loss of the present invention compensation contraction factor k (i), calculate k (i) and be handed down to UE by eNB, UE is when calculating the transmitted power of reverse link traffic channel, former road loss compensation factor α is carried out the technical scheme of convergent-divergent according to k (i), improve the renewal frequency of actual road loss compensation factor, made UE to make response to the change of this residential quarter and adjacent cell edge situation in time, improved systematic function.

Description of drawings

Fig. 1 is the LTE network structure;

Fig. 2 is the flow chart of the disturbance coordination method of a kind of minizone in the embodiment of the invention;

Fig. 3 is a scene example schematic in the embodiment of the invention;

Fig. 4 is the composition structural representation of a kind of eNB in the embodiment of the 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.

Fig. 2 is the flow chart of the disturbance coordination method of a kind of minizone in the embodiment of the invention.As shown in Figure 2, this method comprises:

Step 201, eNB calculates path loss compensation contraction factor k (i), and k (i) is sent to UE.

Step 202, UE calculates the transmitted power P of reverse link traffic channel according to formula (2) _PUSCH(i).Formula (2) is as follows:

P _PUSCH(i)＝min{P _MAX，10log ₁₀(M _PUSCH(i))+P _{O_PUSCH}(j)+(α+k(i))·PL+Δ _TF(i)+f(i)}

(2)

Wherein, i represents subframe, and j represents type of data packet in the residential quarter; PX is maximum allowable power; M _PUSCH(i) be reverse link traffic channel PUSCH transfer bandwidth; P _{O_PUSCH}(j) comprise residential quarter certain nominal power and UE certain nominal power excursion two parts; PL is descending path loss estimated value; Δ _TF(i) be power offset based on modulation coding mode and data type; F (i) represents the closed loop adjustment member of power control; α is road loss compensation factor, and k (i) is the path loss compensation contraction factor, k (i) ∈ { a ₁, a ₂..., a _m, and preferably, α+k (i) ∈ { 0,0.4,0.5,0.6,0.7,0.8,0.9,1}.

Formula (2) is with the difference of formula (1), has increased path loss compensation contraction factor k (i).

In addition, stipulate in the prior protocols: road loss compensation factor α ∈ { 0,0.4,0.5,0.6,0.7,0.8,0.9,1}, though increased path loss compensation contraction factor k (i) among the present invention, but still make α+k (i) ∈ { 0,0.4,0.5,0.6,0.7,0.8,0.9,1}, so the solution of the present invention can get a desired effect, and can not conflict with the prior protocols regulation.

Step 203, UE is according to the transmitted power P of the reverse link traffic channel that calculates _PUSCH(i), send uplink business data at subframe i.

In method shown in Figure 2, redetermination path loss compensation contraction factor k (i), calculate k (i) and be handed down to UE by eNB, UE is when calculating the transmitted power of reverse link traffic channel, according to k (i) former road loss compensation factor α is carried out convergent-divergent, this technical scheme has improved the renewal frequency of actual road loss compensation factor, makes UE to make response to the change of this residential quarter and adjacent cell edge situation in time, has improved systematic function.

About determining of path loss compensation contraction factor k (i), provided following two kinds of schemes among the present invention:

First kind of scheme

ENB obtains path loss compensation contraction factor k (i) by the measurement result I (i) that receives interference power is compared with initial interference power I0, and specifically, eNB calculates path loss compensation contraction factor k (i) according to following formula (3):

$k\left(i\right)=\left\{\begin{array}{cc}{a}_1,& I\left(i\right)-I_0\&GreaterEqual;{\mathrm{\&Delta;}}_1>0;\\ a_2,& {\mathrm{\&Delta;}}_1>I\left(i\right)-I_0\&GreaterEqual;{\mathrm{\&Delta;}}_2\&GreaterEqual;0;\\ ......& \\ a_m,& 0<I_0-I\left(i\right)\&le;{\mathrm{\&Delta;}}_m;\end{array}\right.---\left(3\right)$

Wherein, I (i) represents to distribute to the current reception interference power measured value sum of each PRB of described UE among all Physical Resource Block PRB corresponding with subframe i; I ₀Expression and the subframe i of original allocation ascending resource to UE ₀Among all corresponding PRB, distribute to the initial reception interference power measured value sum of each PRB of described UE; Δ ₁, Δ ₂..., Δ _mBe m the convergent-divergent judging threshold of presetting, in actual applications, can carry out different configurations according to different demands.

Here, I ₀And the statistics of I (i) is carried out with PRB.ENB judges among each PRB that distributes to described UE among the PRB corresponding with subframe i, the interference variations degree greater than the PRB number of predetermined threshold value whether above predetermined number; If then eNB calculates path loss compensation contraction factor k (i), and k (i) is sent to UE.

For example, the number of all PRB of subframe i correspondence is 50, there are 10 PRB to distribute to current UE among these 50 PRB: then for each PRB among these 10 RPB, when its interference variations degree during greater than predetermined threshold value γ, think that this PRB interference variations is big, the PRB number that interference variations is big in these 10 PRB surpasses predetermined number n _PRBThe time, think the adjustment that need carry out path loss compensation contraction factor k (i).I (i) can periodically add up, and in this example, calculates the current reception interference power measured value sum of described 10 PRB, namely obtains I (i), I ₀Statistical value in first cycle during for configuration road loss compensation factor α.

The front mention α+k (i) ∈ 0,0.4,0.5,0.6,0.7,0.8,0.9,1}, then:

When α=0, k (i) ∈ { 0,0.4,0.5,0.6,0.7,0.8,0.9,1};

When α=0.4, k (i) ∈ { 0.4,0,0.1,0.2,0.3,0.4,0.5,0.6};

When α=0.5, k (i) ∈ 0.5 ,-0.1,0,0.1,0.2,0.3,0.4,0.5};

When α=0.6, k (i) ∈ 0.6 ,-0.2 ,-0.1,0,0.1,0.2,0.3,0.4};

When α=0.7, k (i) ∈ { 0.7 ,-0.3 ,-0.2 ,-0.1,0,0.1,0.2,0.3, };

When α=0.8, k (i) ∈ 0.8 ,-0.4 ,-0.3 ,-0.2 ,-0.1,0,0.1,0.2};

When α=0.9, k (i) ∈ 0.9 ,-0.5 ,-0.4 ,-0.3 ,-0.2 ,-0.1,0,0.1};

When α=1, k (i) ∈ 1 ,-0.6 ,-0.5 ,-0.4 ,-0.3 ,-0.2 ,-0.1,0}.

As seen, under certain specific value condition of α, the possible value of k (i) is 8, therefore available 3 bits (bit) are represented k (i), be m=8,8 kinds of values of these three bits are successively under the corresponding current α value state, and 8 kinds of arranging by certain order (for example arranging from small to large) of k (i) may values.For example, when α=1, if k (i) is 001, then α+k (i) specifically equals 1-0.6=0.4; Again for example, when α=0.6, if k (i) is 000, then α+k (i) specifically equals 0.6-0.6=0; By that analogy.

In short, in scheme one, k (i) has reflected that this residential quarter is subjected to the variation of annoyance level.

Fig. 3 is a scene example schematic in the embodiment of the invention.In above-mentioned scheme one, though considered the co-channel interference of base station to all adjacent residential quarters, but do not consider the special circumstances of user's particular location, for example, may have situation as shown in Figure 3: UE0 is the edge customer of residential quarter 0, the strong jamming residential quarter of UE0 is residential quarter 1, but 1 pair of residential quarter 0, residential quarter does not have co-channel interference, i.e. the high-power transmission of UE0 can not produce co-channel interference to residential quarter 1; There are newly-increased co-channel interference in residential quarter 3,4,5 pairs of residential quarters 0, these interference can be measured in the base station, according to scheme one, then might be by path loss compensation contraction factor k (i) to the α processing of demoting, think that namely the transmitted power that reduce UE0 comes the balance presence of intercell interference.But in fact, because UE0 and residential quarter 3,4,5 distance are far away, UE0 is in order to keep certain signal to noise ratio target, and promotes transmitted power, and the interference that produces is less to residential quarter 3,4,5 influence.In order to address this is that, provided following scheme two among the present invention.

Second kind of scheme

The high interference that has increased user's strong jamming residential quarter in this programme changes indication, namely considers the adjacent area interference variations, and by two weighted factor λ ₁And λ ₂Come the interference variations of this residential quarter of balance and the influence that adjacent area interference changes.

Specifically, eNB calculates path loss compensation contraction factor k (i) according to following formula:

$k^{\&prime;}\left(i\right)=\left\{\begin{array}{cc}{a}_1,& I\left(i\right)-I_0\&GreaterEqual;{\mathrm{\&Delta;}}_1>0;\\ a_2,& {\mathrm{\&Delta;}}_1>I\left(i\right)-I_0\&GreaterEqual;{\mathrm{\&Delta;}}_2\&GreaterEqual;0;\\ ......& \\ a_m,& 0<I_0-I\left(i\right)\&le;{\mathrm{\&Delta;}}_m;\end{array}\right.---\left(5\right)$

$p\left(i\right)=\left\{\begin{array}{cc}{b}_1,& \mathrm{HII}\left(i\right)-{\mathrm{HII}}_0\&GreaterEqual;{{\mathrm{\&Delta;}}^{\&prime;}}_1>0;\\ b_2,& {{\mathrm{\&Delta;}}^{\&prime;}}_1>\mathrm{HII}\left(i\right)-{\mathrm{HII}}_0\&GreaterEqual;{{\mathrm{\&Delta;}}^{\&prime;}}_2\&GreaterEqual;0;\\ ......& \\ b_m,& 0<{\mathrm{HII}}_0-\mathrm{HII}\left(i\right)\&le;{{\mathrm{\&Delta;}}^{\&prime;}}_m;\end{array}\right.---\left(6\right)$

λ ₁+λ ₂＝1；

Wherein, I ₀Expression and the subframe i of original allocation ascending resource to UE ₀Among all corresponding PRB, distribute to the initial reception interference power measured value sum of each PRB of described UE; I (i) represents to distribute to the current reception interference power measured value sum of each PRB of described UE among all Physical Resource Block PRB corresponding with subframe i; HII ₀Add up during for described UE place cell initial, from the indicated high interference PRB number sum of high interference indication HII parameter of the strong jamming residential quarter of described UE; HII (i) is the current statistics in residential quarter, described UE place, from the indicated high interference PRB number sum of high interference indication HII parameter of the strong jamming residential quarter of described UE; Δ ₁, Δ ₂..., Δ _mBe m the convergent-divergent judging threshold of presetting, Δ ' ₁, Δ ' ₂..., Δ ' _mBe that m the high interference of presetting changes judging threshold, in actual applications, can carry out different configurations according to different demands.

If by calculating k (i)=0, think that then current the needs carry out convergent-divergent to α.

The strong jamming residential quarter of UE can be measured by the Reference Signal Received Power RSRP of UE and obtain HII ₀High interference indication when initial, during by configuration α to the acquisition of suing for peace of the indicated high interference PRB number in described strong jamming residential quarter.

As seen, in scheme two, k (i) is that local area receives interference variations weighting and adjacent area interference variations weighting sum.

In above-mentioned scheme one and scheme two, the span of k (i) can be expanded by designing different thresholdings or weighted factor and increasing shared bit number.

In an embodiment of the present invention, eNB can be by taking the LCID territory that medium access control MAC layer is reserved, and media access control layer service data unit MAC SDU, and k (i) is sent to UE.In this case, can be as shown in table 1 with the value revision of the LCID among the DL-SCH:

Table 1

Namely increase the indication about the zoom factor k (i) of α in the LCID territory, and in MACSDU, specifically carried k (i).

In the solution of the present invention, if eNB does not need to change UE certain nominal power excursion, then do not send the RRC signaling; Equally, the UE that does not receive the RRC signaling thinks current P _{O_PUSCH}(j) UE certain nominal power excursion in need not to change.

As seen, technical scheme of the present invention is by increasing the zoom factor k (i) of α, improved the renewal frequency of path loss compensation, solve the problem of the α configuration that can't be in time changes according to the variation of this residential quarter or adjacent Cell Edge User, and solved the signaling consumption big problem in order to guarantee that frequent transmission RRC uplink power control dedicated signaling that the UE target signal to noise ratio causes brings.

Provide the composition structure of a kind of eNB among the present invention based on above-described embodiment.

Fig. 4 is the composition structural representation of a kind of eNB in the embodiment of the invention.As shown in Figure 4, this eNB comprises: computing module 401 and issue module 402, wherein:

Computing module 401 be used for to calculate path loss compensation contraction factor k (i), and k (i) sent to issues module 402;

Issue module 402, be used for k (i) is sent to user equipment (UE);

Wherein, after UE receives k (i), calculate the transmitted power P of reverse link traffic channel according to following formula (2) _PUSCH(i), and according to the P that calculates _PUSCH(i), send uplink business data at subframe i:

P _PUSCH(i)＝min{P _MAX，10log ₁₀(M _PUSCH(i))+P _{O_PUSCH}(j)+(α+k(i))·PL+Δ _TF(i)+f(i)}

(2)

Wherein, i represents subframe, and j represents type of data packet in the residential quarter; P _MAXBe maximum allowable power; M _PUSCH(i) be reverse link traffic channel PUSCH transfer bandwidth; P _{O_PUSCH}(j) comprise residential quarter certain nominal power and UE certain nominal power excursion two parts; PL is descending path loss estimated value; Δ _TF(i) be power offset based on modulation coding mode and data type; F (i) represents the closed loop adjustment member of power control; α is road loss compensation factor, and k (i) is the path loss compensation contraction factor.

In eNB shown in Figure 4, described computing module 401 is used for calculating path loss compensation contraction factor k (i) according to following formula (3):

$k\left(i\right)=\left\{\begin{array}{cc}{a}_1,& I\left(i\right)-I_0\&GreaterEqual;{\mathrm{\&Delta;}}_1>0;\\ a_2,& {\mathrm{\&Delta;}}_1>I\left(i\right)-I_0\&GreaterEqual;{\mathrm{\&Delta;}}_2\&GreaterEqual;0;\\ ......& \\ a_m,& 0<I_0-I\left(i\right)\&le;{\mathrm{\&Delta;}}_m;\end{array}\right.---\left(3\right)$

Wherein, I (i) represents to distribute to the current reception interference power measured value sum of each PRB of described UE among all Physical Resource Block PRB corresponding with subframe i; I ₀Expression and the subframe i of original allocation ascending resource to UE ₀Among all corresponding PRB, distribute to the initial reception interference power measured value sum of each PRB of described UE; Δ ₁, Δ ₂..., Δ _mIt is the convergent-divergent judging threshold of presetting.

In eNB shown in Figure 4, described computing module 401 is used for calculating path loss compensation contraction factor k (i) according to following formula (4), (5), (6):

$k^{\&prime;}\left(i\right)=\left\{\begin{array}{cc}{a}_1,& I\left(i\right)-I_0\&GreaterEqual;{\mathrm{\&Delta;}}_1>0;\\ a_2,& {\mathrm{\&Delta;}}_1>I\left(i\right)-I_0\&GreaterEqual;{\mathrm{\&Delta;}}_2\&GreaterEqual;0;\\ ......& \\ a_m,& 0<I_0-I\left(i\right)\&le;{\mathrm{\&Delta;}}_m;\end{array}\right.---\left(5\right)$

$p\left(i\right)=\left\{\begin{array}{cc}{b}_1,& \mathrm{HII}\left(i\right)-{\mathrm{HII}}_0\&GreaterEqual;{{\mathrm{\&Delta;}}^{\&prime;}}_1>0;\\ b_2,& {{\mathrm{\&Delta;}}^{\&prime;}}_1>\mathrm{HII}\left(i\right)-{\mathrm{HII}}_0\&GreaterEqual;{{\mathrm{\&Delta;}}^{\&prime;}}_2\&GreaterEqual;0;\\ ......& \\ b_m,& 0<{\mathrm{HII}}_0-\mathrm{HII}\left(i\right)\&le;{{\mathrm{\&Delta;}}^{\&prime;}}_m;\end{array}\right.---\left(6\right)$

λ ₁+λ ₂＝1；

Wherein, I ₀Expression and the subframe i of original allocation ascending resource to UE ₀Among all corresponding PRB, distribute to the initial reception interference power measured value sum of each PRB of described UE; I (i) represents to distribute to the current reception interference power measured value sum of each PRB of described UE among all Physical Resource Block PRB corresponding with subframe i; HII ₀Add up during for described UE place cell initial, from the indicated high interference PRB number sum of high interference indication HII parameter of the strong jamming residential quarter of described UE; HII (i) is the current statistics in residential quarter, described UE place, from the indicated high interference PRB number sum of high interference indication HII parameter of the strong jamming residential quarter of described UE; Δ ₁, Δ ₂..., Δ _mBe m the convergent-divergent judging threshold of presetting, Δ ' ₁, Δ ' ₂..., Δ ' _mBe that m the high interference of presetting changes judging threshold.

As shown in Figure 4, this eNB further comprises: judge module 403 is used for judging among each PRB that distributes to described UE of the PRB corresponding with subframe i whether the interference variations degree surpasses predetermined number greater than the PRB number of predetermined threshold value, if then send calculation command to computing module 401;

Described computing module 401 is used for calculating path loss compensation contraction factor k (i) after the calculation command that receives the judge module transmission.

In eNB shown in Figure 4, the described module 402 that issues is used for by taking the LCID territory that medium access control MAC layer is reserved, and media access control layer service data unit MAC SDU, and k (i) is sent to UE.

In sum, this definition path loss of the present invention compensation contraction factor k (i), calculate k (i) and be handed down to UE by eNB, UE is when calculating the transmitted power of reverse link traffic channel, former road loss compensation factor α is carried out the technical scheme of convergent-divergent according to k (i), improve the renewal frequency of actual road loss compensation factor, made UE to make response to the change of this residential quarter and adjacent cell edge situation in time, improved systematic function.

The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of making, is equal to replacement, improvement etc., all should be included within the scope of protection of the invention.

Claims (6)

1. the disturbance coordination method of a minizone is characterized in that, this method comprises:

Base station eNB is calculated path loss compensation contraction factor k (i), and k (i) is sent to user equipment (UE);

UE calculates the transmitted power P of reverse link traffic channel according to following formula _PUSCH(i): P _PUSCH(i)=min{P _MAX, 10log ₁₀(M _PUSCH(i))+P _{O_PUSCH}(j)+(α+k (i)) PL+ Δ _TF(i)+and f (i) } wherein, i represents subframe, j represents type of data packet in the residential quarter; P _MAXBe maximum allowable power; M _PUSCH(i) be reverse link traffic channel PUSCH transfer bandwidth; P _{O_PUSCH}(j) comprise residential quarter certain nominal power and UE certain nominal power excursion two parts; PL is descending path loss estimated value; Δ _TF(i) be power offset based on modulation coding mode and data type; F (i) represents the closed loop adjustment member of power control; α is road loss compensation factor, and k (i) is the path loss compensation contraction factor;

UE is according to the transmitted power P of the reverse link traffic channel that calculates _PUSCH(i), send uplink business data at subframe i;

Wherein, described eNB calculates path loss compensation contraction factor k (i) according to following formula:

Wherein, I (i) represents to distribute to the current reception interference power measured value sum of each PRB of described UE among all Physical Resource Block PRB corresponding with subframe i; I ₀Expression and the subframe i of original allocation ascending resource to UE ₀Among all corresponding PRB, distribute to the initial reception interference power measured value sum of each PRB of described UE; Δ ₁, Δ ₂..., Δ _mIt is the convergent-divergent judging threshold of presetting;

Perhaps, described eNB calculates path loss compensation contraction factor k (i) according to following formula:

λ ₁+λ ₂＝1；

Wherein, I ₀Expression and the subframe i of original allocation ascending resource to UE ₀Among all corresponding PRB, distribute to the initial reception interference power measured value sum of each PRB of described UE; I (i) represents to distribute to the current reception interference power measured value sum of each PRB of described UE among all Physical Resource Block PRB corresponding with subframe i; HII ₀Add up during for described UE place cell initial, from the indicated high interference PRB number sum of high interference indication HII parameter of the strong jamming residential quarter of described UE; HII (i) is the current statistics in residential quarter, described UE place, from the indicated high interference PRB number sum of high interference indication HII parameter of the strong jamming residential quarter of described UE; Δ ₁, Δ ₂..., Δ _mBe m the convergent-divergent judging threshold of presetting, Δ ' ₁, Δ ' ₂... .., Δ ' _mBe that m the high interference of presetting changes judging threshold.

2. method according to claim 1 is characterized in that, calculates path loss compensation contraction factor k (i) at described eNB, and k (i) is sent to before the UE, and this method further comprises:

ENB judges among each PRB that distributes to described UE among the PRB corresponding with subframe i, the interference variations degree greater than the PRB number of predetermined threshold value whether above predetermined number;

If then carry out described eNB and calculate path loss compensation contraction factor k (i), and k (i) is sent to the step of UE.

3. method according to claim 1 and 2 is characterized in that, eNB sends to UE with k (i) and comprises:

ENB is by taking the LCID territory that medium access control MAC layer is reserved, and media access control layer service data unit MAC SDU, and k (i) is sent to UE.

4. a base station eNB is characterized in that, this eNB comprises: computing module and issue module, wherein:

Computing module be used for to calculate path loss compensation contraction factor k (i), and k (i) sent to issues module;

Issue module, be used for k (i) is sent to user equipment (UE);

Wherein, after UE receives k (i), calculate the transmitted power P of reverse link traffic channel according to following formula _PUSCH(i), and according to the P that calculates _PUSCH(i), send uplink business data at subframe i:

P _PUSCH(i)=min{P _MAX, 10log ₁₀(M _PUSCH(i))+P _{O_PUSCH}(j)+(α+k (i)) PL+ Δ _TF(i)+and f (i) } wherein, i represents subframe, j represents type of data packet in the residential quarter; P _MAXBe maximum allowable power; M _PUSCH(i) be reverse link traffic channel PUS CH transfer bandwidth; P _{O_PUSCH}(j) comprise residential quarter certain nominal power and UE certain nominal power excursion two parts; PL is descending path loss estimated value; Δ _TF(i) be power offset based on modulation coding mode and data type; F (i) represents the closed loop adjustment member of power control; α is road loss compensation factor, and k (i) is the path loss compensation contraction factor;

Described computing module is used for calculating path loss compensation contraction factor k (i) according to following formula:

Wherein, I (i) represents to distribute to the current reception interference power measured value sum of each PRB of described UE among all Physical Resource Block PRB corresponding with subframe i; I ₀Expression and the subframe i of original allocation ascending resource to UE ₀Among all corresponding PRB, distribute to the initial reception interference power measured value sum of each PRB of described UE; Δ ₁, Δ ₂..., Δ _mIt is the convergent-divergent judging threshold of presetting

Perhaps, described computing module is used for calculating path loss compensation contraction factor k (i) according to following formula:

λ ₁+λ ₂＝1；

Wherein, I ₀Expression and the subframe i of original allocation ascending resource to UE ₀Among all corresponding PRB, distribute to the initial reception interference power measured value sum of each PRB of described UE; I (i) represents to distribute to the current reception interference power measured value sum of each PRB of described UE among all Physical Resource Block PRB corresponding with subframe i; HII ₀Add up during for described UE place cell initial, from the indicated high interference PRB number sum of high interference indication HII parameter of the strong jamming residential quarter of described UE; HII (i) is the current statistics in residential quarter, described UE place, from the indicated high interference PRB number sum of high interference indication HII parameter of the strong jamming residential quarter of described UE; Δ ₁, Δ ₂..., Δ _mBe m the convergent-divergent judging threshold of presetting, Δ ' ₁, Δ ' ₂..., Δ ' _mBe that m the high interference of presetting changes judging threshold.

5. eNB according to claim 4, it is characterized in that, this eNB further comprises: judge module, be used for judging among each PRB that distributes to described UE of the PRB corresponding with subframe i, whether the interference variations degree surpasses predetermined number greater than the PRB number of predetermined threshold value, if then send calculation command to computing module;

Described computing module is used for calculating path loss compensation contraction factor k (i) after the calculation command that receives the judge module transmission.

6. according to claim 4 or 5 described eNB, it is characterized in that,

The described module that issues is used for by taking the LCID territory that medium access control MAC layer is reserved, and media access control layer service data unit MAC SDU, and k (i) is sent to UE.

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