CN101340215A - Method and device for determining transmitting power of special burst sub-frame - Google Patents

Abstract

The invention provides a method for determining the transmitting power of special bursting sub frames, which is applied to the discontinuous transmitting process of downlinks and includes the following steps: determining the transmitting power of reference special bursting second sub frames; determining the increase value of path loss of the current special bursting sub frames comparatively to the reference special bursting second sub frames; determining the sum of the transmitting power of the reference special bursting second sub frames and the increase value of the path loss as the transmitting power of the current special bursting sub frames; the reference special bursting sub frame is a first special bursting second sub frame in the discontinuous transmitting process of the downlinks or the previous special bursting second sub frame in current special bursting transmitted or the special bursting second sub frame currently transmitted in the special bursting period with preset numbers apart before the special bursting sub frames. The invention provides a device which determines the transmitting power of the special bursting sub frames. By adopting the invention, the transmitting power of the current special bursting sub frames can be more accurate so as to improve the call quality in the downlink DTX process and reduce the call drop.

Description

Determine the method and apparatus of the transmitting power of special burst sub-frame

Technical field

The present invention relates to wireless communication technology field, particularly a kind of method and apparatus of transmitting power of definite special burst sub-frame.

Background technology

Exclusive data between network and the user is that (Dedicated Physical Channel DPCH), aloft transmits with the form of radio frames by DPCH.A radio frames comprises two subframes.

In order to reduce the interference of interchannel, elevator system capacity, existing wireless communication system adopt discontinuous emission (Discontinuous Transmission, DTX) technology.With descending DTX is example, be specially: between the quiet period of communication process, base station (NodeB) high level does not have data allocations to DPCH, be that NodeB does not have data burst to send to user terminal (User Equipment by DPCH, UE), but on DPCH, periodically send special burst (Special Burst) to UE, with the carrying out of the descending DTX process of notice UE.A special burst sends with a radio frames, and then as previously mentioned, a special burst comprises two special burst sub-frames.

Control to the transmitting power of DPCH is aspect very important in the wireless communication system.Usually, can adopt close-loop power controlling method to realize.The power of the signal that the NodeB that the UE basis is received sends, (Transmission Power Control, TPC) Ming Ling burst is inserted in the subframe of up DPCH, sends to NodeB constantly will to comprise through-put power control.After NodeB receives this subframe, adjust the power that descending DPCH sends subframe according to TPC order wherein.Like this, UE constantly sends the information that comprises the TPC order according to the power of NodeB, power when NodeB constantly sends DPCH once more according to the order of the TPC in the information of receiving adjustment, the power control process between NodeB and the UE has constituted the loop of a closure, i.e. closed power control.

And in descending DTX process, NodeB periodically sends to UE with special burst sub-frame, and between two special bursts, NodeB does not send information.UE is between two special bursts receiving, and each subframe of receiving is a no signal sub-frame, and the signal of these subframes is made of noise and interference.Correspondingly, the TPC order that UE generates for each no signal sub-frame is not correct TPC order, and these orders still send to NodeB by UE.At this situation, stipulate in the 3GPP standard that NodeB ignores the TPC order that the UE that receives sends during descending DTX.NodeB ignores in the DTX process in the TPC order of UE transmission, adopts certain method to determine its transmitting power at the descending special burst sub-frame on each DPCH during the DTX, is specially following formula:

PowerSB(n)＝TSCP+PowerMargin_DLDTX

Wherein, n is the sequence number of special burst sub-frame;

TSCP is the up-to-date TSCP measured value that descending DTX process obtains before for sending signal code power (Transmitted Signal Code Power).This TSCP value is not upgraded in descending DTX process, and promptly this value is constant;

PowerMargin_DLDTX is the bias that is provided with for the compensating for path loss, and this value is Operation and Maintenance parameter in the descending DTX process, be one fixing on the occasion of, unit is dB.Following formula is the dB form, and it also all is that the dB form is represented that the formula that below relates to does not have special declaration.

Should be noted in the discussion above that these computational methods are applicable to the calculating of the transmitting power of other special burst sub-frame except that first special burst in the descending DTX process.Because the transmitting power of each subframe of first special burst still can obtain according to the computational methods of before closed power in the descending DTX process.

Like this, in the descending DTX process, the transmitting power of special burst sub-frame on DPCH is that TSCP increases a biasing, and TSCP and bias all are invariable, and therefore, the transmitting power of the DPCH of this emission special burst sub-frame also is changeless.

But, under the long situation of descending DTX process duration, if UE moves towards the direction near NodeB, it is more and more littler that path loss generally can become, the power of the special burst sub-frame that NodeB need launch also can diminish, and because the power that obtains of aforesaid computational methods is changeless, what cause that the power of the special burst sub-frame launched can be than needs is big, can cause interference to other UE like this.Similarly, if UE moves towards the direction away from NodeB, it is increasing that path loss generally can become, it is big that the power of the special burst sub-frame that NodeB need send also can become, and because the power that aforesaid computational methods obtain is changeless, cause the power of the special burst sub-frame that sends can be littler, can reduce speech quality like this, even may produce call drop than needs.

Summary of the invention

The method that the purpose of this invention is to provide a kind of transmitting power of definite special burst sub-frame causes the constant and reduction speech quality that produces of its transmitting power, the shortcoming that causes call drop or other UE is caused interference to overcome prior art to the determining method of launch power of special burst sub-frame.

For solving the problems of the technologies described above, the method and apparatus that the invention provides a kind of transmitting power of definite special burst sub-frame is achieved in that

A kind of method of transmitting power of definite special burst sub-frame is applied to comprise in the descending discontinuous emission process:

Determine transmitting power with reference to second subframe of special burst; Determine that current special burst sub-frame is with respect to described path loss added value with reference to special burst second subframe;

The transmitting power that will be defined as current special burst sub-frame with reference to the transmitting power and the described path loss added value sum of special burst second subframe.

Described definite current special burst sub-frame is realized by following mode with respect to described path loss added value with reference to special burst second subframe:

When the distance when transmitted-reference special burst second subframe between user terminal and base station is known, distance during according to transmitted-reference special burst second subframe between user terminal and base station and calculate described path loss added value with respect to the radial displacement of transmitted-reference special burst second subframe when launching current special burst sub-frame.

Described path loss added value is calculated by following formula:

$\mathrm{PathLossIncrement}{=\left(\frac{\mathrm{Dis}\tan \mathrm{ce}+d}{d}\right)}^u,$

This formula is that linear domain is represented, wherein, u is the channel index, and this value can be determined that span is 2 to 4 real number by system;

Distance is the radial displacement of user terminal during with respect to second subframe of transmitted-reference special burst in the descending discontinuous emission process during for the current special burst sub-frame of emission;

User terminal when d is second subframe of transmitted-reference special burst and the distance between the base station.

Described definite current special burst sub-frame is realized by following mode with respect to described path loss added value with reference to special burst second subframe:

When the distance when transmitted-reference special burst second subframe between user terminal and base station is unknown, this distance is made as half of described base station covering radius;

Distance during according to transmitted-reference special burst second subframe between user terminal and base station and when launching current special burst sub-frame radial displacement and the biasing with respect to transmitted-reference special burst second subframe calculate described path loss added value.

Described path loss added value is calculated by following formula:

$\mathrm{PathLossIncrement}={\left(\frac{\mathrm{Dis}\tan \mathrm{ce}+d}{d}\right)}^u\·{10}^{\frac{\mathrm{PowerM}\arg \mathrm{in}}{10}}$

This formula is that linear domain is represented, wherein, u is the channel index, and this value can be determined that span is 2 to 4 real number by system;

Distance is the radial displacement of user terminal during with respect to second subframe of transmitted-reference special burst in the descending discontinuous emission process during for the current special burst sub-frame of emission;

User terminal when d is second subframe of transmitted-reference special burst and the distance between the base station;

PowerMargin is biasing, and unit is dB, can preestablish.

Described radial displacement, i.e. Distance, can be calculated by following formula:

Distance＝(X _Delay(n-D _ul)-X _Delay(m))*c，

Wherein, D _UlBe that the base station generates the time delay number of sub-frames of down-going synchronous order, m be in the discontinuous emission process with reference to the numbering of second subframe of special burst, c is the light velocity;

N is the numbering of current special burst sub-frame in the discontinuous emission process;

X _Delay(n) be the delay average of the subframe that is numbered n that calculates of the pairing uplink special physical channel of downward special physical channel of the current special burst sub-frame of emission.

X _Delay(n) can calculate by following formula:

X _Delay(n)＝pX _Delay(n-1)+(1-p)X _Delay(n)，

Wherein, p is a forgetting factor, X _Delay(0)=0, and, X _Delay(n)=(X _SS(n)+X _PEAK(n)-PEAK _Target)/2,

X _SS(n) the user terminal Synchronization Control adjusted value for adding up, X _SS(0)=0, PEAK _TargetBe the target location of the peak value of the channel impulse response of the pairing uplink special physical channel of downward special physical channel of launching described special burst, X _PEAK(n) be the position of peak value of the channel impulse response of n subframe uplink DPCH.

Described X _SS(n) can calculate by following formula:

$X_{\mathrm{SS}}\left(n\right)=X_{\mathrm{SS}}(n-1)+S{S}_{\mathrm{UL}}^{*}(n-D)*k/8,$ ${\mathrm{SS}}_{\mathrm{UL}}^{*}\left(n\right)=\left\{\begin{array}{cc}1,& S{S}_{\mathrm{UL}}\left(n\right)=11\\ 0,& {\mathrm{SS}}_{\mathrm{UL}}\left(n\right)=01\\ -1,& {\mathrm{SS}}_{\mathrm{UL}}\left(n\right)=00\end{array}\right.$

Wherein, D is that the base station generates the time delay of uplink synchronous control command and the time delay sum of user terminal response uplink synchronous control command; SS _UL(n) the described uplink special physical channel of expression is in the uplink synchronous control command of n subframe generation, and k is the uplink synchronous Control Parameter, and span is 1 to 8 integer, and this parameter can be disposed by radio network controller.

Described radial displacement, i.e. Distance, calculated by following formula:

$\mathrm{Dis}\tan \mathrm{ce}=c*P_{\mathrm{step}\_\mathrm{SC}}\underset{l=m}{\overset{n-\mathrm{delay}}{\mathrm{\Σ}}}S{S}_{\mathrm{UL}}^{*}\left(l\right)$

Wherein, c is the light velocity, P _{Step_SC}Be Synchronization Control step-length, SS _UL ^*(l) be synchronisation offset, m is first second subframe numbering that happens suddenly, (n-delay) current burst sub-frame numbering for considering to postpone,

Be happen suddenly simultaneous bias aggregate-value between second subframe of current burst sub-frame and first.Described is second subframe of first special burst in the descending discontinuous emission process with reference to special burst sub-frame; Or be,

Second subframe of the last special burst of the special burst of current emission; Or be,

Second subframe of the special burst in special burst emission cycle before the special burst of current emission, that be separated by preset number.

A kind of device of transmitting power of definite special burst sub-frame is applied in the descending discontinuous emission process, comprises with reference to the special burst second subframe transmitting power determining unit 61, path loss added value computing unit 62, current special burst sub-frame transmitting power computing unit 63, wherein

With reference to the special burst second subframe transmitting power determining unit 61, be used for determining transmitting power with reference to second subframe of special burst;

Path loss added value computing unit 62 is used for determining that current special burst sub-frame is with respect to described path loss added value with reference to special burst second subframe;

Current special burst sub-frame transmitting power determining unit 63 is used for the transmitting power that transmitting power and described path loss added value sum with reference special burst second subframe are defined as current special burst sub-frame.

When the distance when transmitted-reference special burst second subframe between user terminal and base station is known, described path loss added value computing unit 62 distance between user terminal and base station and calculate described path loss added value with respect to the radial displacement of transmitted-reference special burst second subframe when launching current special burst sub-frame during according to transmitted-reference special burst second subframe.

Described path loss added value computing unit (62) is according to following formula calculating path loss added value:

$\mathrm{PathLossIncrement}={\left(\frac{\mathrm{Dis}\tan \mathrm{ce}+d}{d}\right)}^u$

This formula is that linear domain is represented, wherein, u is the channel index, and this value is by system's decision, and span is 2 to 4 real number;

Distance is the radial displacement of user terminal during with respect to second subframe of transmitted-reference special burst in the descending discontinuous emission process during for the current special burst sub-frame of emission;

User terminal when d is second subframe of transmitted-reference special burst and the distance between the base station.

When the distance when transmitted-reference special burst second subframe between user terminal and base station is unknown, described path loss added value computing unit 62 is made as this distance half of described base station covering radius, according to this distance, described path loss added value is calculated in radial displacement and a biasing with respect to transmitted-reference special burst second subframe when launching current special burst sub-frame.

Described path loss added value computing unit (62) is according to following formula calculating path loss added value:

$\mathrm{PathLossIncrement}={\left(\frac{\mathrm{Dis}\tan \mathrm{ce}+d}{d}\right)}^u\·{10}^{\frac{\mathrm{PowerM}\arg \mathrm{in}}{10}}$

This formula is that linear domain is represented, wherein, u is the channel index, and this value is by system's decision, and span is 2 to 4 real number;

Distance is the radial displacement of user terminal during with respect to second subframe of transmitted-reference special burst in the descending discontinuous emission process during for the current special burst sub-frame of emission;

User terminal during for second subframe of transmitted-reference special burst and the distance between the base station;

PowerMargin is biasing, and unit is dB, can preestablish.

Described path loss added value computing unit 62 comprises radial displacement computing unit 621, and this radial displacement computing unit 621 calculates radial displacement, i.e. Distance by following formula:

Distance＝(X _Delay(n-D _ul)-X _Delay(m))*c，

Wherein, D _UlBe that the base station generates the time delay number of sub-frames of down-going synchronous order, m be in the discontinuous emission process with reference to the numbering of second subframe of special burst, c is the light velocity;

N is the numbering of current special burst sub-frame in the discontinuous emission process;

X _Delay(n) be the delay average of the subframe that is numbered n that calculates of the pairing uplink special physical channel of downward special physical channel of the current special burst sub-frame of emission;

Described X _Delay(n) calculate by following formula:

X _Delay(n)＝pX _Delay(n-1)+(1-p)X _Delay(n)，

Wherein, p is a forgetting factor, X _Delay(0)=0, and, X _Delay(n)=(X _SS(n)+X _PEAK(n)-PEAK _Target)/2,

X _SS(n) the user terminal Synchronization Control adjusted value for adding up, X _SS(0)=0, PEAK _TargetBe the target location of the peak value of the channel impulse response of the pairing uplink special physical channel of downward special physical channel of launching described special burst, X _PEAK(n) be the position of peak value of the channel impulse response of n subframe uplink DPCH;

Described X _SS(n) calculate by following formula:

$X_{\mathrm{SS}}\left(n\right)=X_{\mathrm{SS}}(n-1)+S{S}_{\mathrm{UL}}^{*}(n-D)*k/8,$ ${\mathrm{SS}}_{\mathrm{UL}}^{*}\left(n\right)=\left\{\begin{array}{cc}1,& S{S}_{\mathrm{UL}}\left(n\right)=11\\ 0,& {\mathrm{SS}}_{\mathrm{UL}}\left(n\right)=01\\ -1,& {\mathrm{SS}}_{\mathrm{UL}}\left(n\right)=00\end{array}\right.$

Wherein, D is that the base station generates the time delay of uplink synchronous control command and the time delay sum of user terminal response uplink synchronous control command; SS _UL(n) the described uplink special physical channel of expression is in the uplink synchronous control command of n subframe generation, and k is the uplink synchronous Control Parameter, and span is 1 to 8 integer, and this parameter is disposed by radio network controller.

Described path loss added value computing unit 62 comprises radial displacement computing unit 621, and this radial displacement computing unit 621 calculates radial displacement, i.e. Distance by following formula:

$\mathrm{Dis}\tan \mathrm{ce}=c*P_{\mathrm{step}\_\mathrm{SC}}\underset{l=m}{\overset{n-\mathrm{delay}}{\mathrm{\Σ}}}S{S}_{\mathrm{UL}}^{*}\left(l\right)$

Wherein, c is the light velocity, P _{Step_SC}Be Synchronization Control step-length, SS _UL ^*(l) be synchronisation offset, m is first second subframe numbering that happens suddenly, (n-delay) current burst sub-frame numbering for considering to postpone,

Be happen suddenly simultaneous bias aggregate-value between second subframe of current burst sub-frame and first.

Described is second subframe of first special burst in the descending discontinuous emission process with reference to special burst sub-frame; Or be,

Second subframe of the last special burst of the special burst of current emission; Or be,

Second subframe of the special burst in special burst emission cycle before the special burst of current emission, that be separated by preset number.

By above technical scheme provided by the invention as seen, the present invention determines in the descending DTX process transmitting power with reference to special burst second subframe, and determine that current special burst sub-frame is with respect to described path loss added value with reference to special burst second subframe, the transmitting power that will be defined as current special burst sub-frame with reference to the transmitting power and the described path loss added value sum of special burst second subframe, like this, the transmitting power of current special burst sub-frame has considered that UE moves the path loss variation of bringing in the descending DTX process, make the transmitting power of special burst sub-frame more accurate, and then improved speech quality in the descending DTX process, reduced call drop.

Description of drawings

Fig. 1 is the schematic diagram of first embodiment of the invention;

Fig. 2 is the flow chart of first embodiment of the invention;

Fig. 3 calculates the schematic diagram of radial displacement for the present invention;

Fig. 4 is the schematic diagram of second embodiment of the invention;

Fig. 5 is the schematic diagram of third embodiment of the invention;

Fig. 6 is the block diagram of apparatus of the present invention embodiment.

Embodiment

Core of the present invention is the transmitting power of determining in the descending DTX process with reference to special burst second subframe, and determine current special burst sub-frame with respect to described path loss added value, the transmitting power that will be defined as current special burst sub-frame with reference to the transmitting power and the described path loss added value sum of special burst second subframe with reference to special burst second subframe.Concrete, first special burst in the descending DTX process can be made as with reference to special burst, then for determining the transmitting power of first special burst second subframe, and determine the path loss added value of current special burst sub-frame with respect to described first special burst second subframe, with the transmitting power of second subframe of described first special burst and the transmitting power that described path loss added value sum is defined as current special burst sub-frame.Also the last special burst of current special burst can be made as with reference to special burst, it then is the transmitting power of determining last special burst second subframe of current special burst, and determine the path loss added value of current special burst sub-frame with respect to described last special burst second subframe, with the transmitting power of second subframe of described last special burst and the transmitting power that described path loss added value sum is defined as current special burst sub-frame.Can also be to determine the once transmitting power of current special burst sub-frame every a time period.

In order to make those skilled in the art understand the solution of the present invention better, the present invention is described in further detail below in conjunction with the drawings and specific embodiments.

At first introduce first embodiment of the present invention.Fig. 1 shows the principle of first embodiment of the invention.

Set in the capable DTX process first special burst for reference to special burst, determine the transmitting power of this first special burst second subframe, and determine the path loss added value of current special burst sub-frame with respect to described first special burst second subframe, with the transmitting power of second subframe of described first special burst and the transmitting power that described path loss added value sum is defined as current special burst sub-frame.

If the distance when launching second subframe of described first special burst between UE and the NodeB is known, then described path loss added value can be determined with described distance jointly by emission radial displacement during with respect to first special burst second subframe of emission during current special burst sub-frame.If the distance when described first special burst second subframe of emission between UE and the NodeB be the unknown, then described path loss added value can be by emission radial displacement during with respect to first special burst second subframe of emission during current special burst sub-frame, determines jointly with bias of a half-sum of NodeB covering radius.

Fig. 2 shows the flow process of first embodiment of the invention.

Step 201: the transmitting power of determining second subframe of first special burst.

By preceding as can be known described, the transmitting power of first special burst in the existing descending DTX technology can be obtained by closed loop power control algorithm.The transmitting power of first special burst in the embodiment of the invention also is to utilize closed loop power control algorithm to obtain, transmitting power specific to first special burst second subframe, be designated as PowerFirstSB, this value can be obtained by closed loop power control algorithm by NodeB.

Step 202: the path loss added value when determining the current subframe of emission during with respect to described first special burst second subframe of emission.

When NodeB launches current special burst sub-frame, might produce displacement during with respect to emission first burst second subframe, correspondingly, the transmitting power of current special burst sub-frame need be adjusted, wherein, what will consider at described displacement is the path loss added value that is produced by this displacement, and this value is designated as PathLossIncrement.In the present embodiment, each special burst sub-frame after first happens suddenly second subframe all needs to calculate with respect to the PathLossIncrement of first second subframe that happens suddenly.

PathLossIncrement is the path loss added value of current burst sub-frame with respect to first second subframe that happens suddenly, present embodiment adopts displacement to calculate, therefore when calculating PathLossIncrement, need at first know first UE when happening suddenly subframe of emission and the distance between the NodeB, this distance is designated as d.This value NodeB can obtain by network positions service or other method, does not repeat them here.

The calculating of PathLossIncrement also needs to obtain the radial displacement of current burst sub-frame with respect to first second subframe that happens suddenly, and this value is designated as Distance.Fig. 3 shows the principle of calculating radial displacement.As shown in the figure, UE is at the A point when launching first special burst second subframe, and UE is at the B point when launching current special burst sub-frame, and then Distance is 2 displacements on the NodeB covering radius of UE place A, B, i.e. radial displacement among the figure.

Then, described path loss added value can calculate by following formula:

$\mathrm{PathLossIncrement}={\left(\frac{\mathrm{Dis}\tan \mathrm{ce}+d}{d}\right)}^u---\left(1\right)$

This formula is that linear domain is represented, wherein, u is the channel index, and this value can be determined that general span is 2 to 4 real number by system.Log-domain represents then to be following formula:

$\mathrm{PathLossIncrement}=10u\log \left(\frac{\mathrm{Dis}\tan \mathrm{ce}+d}{d}\right)$

Below introduce the computational methods of Distance.

One skilled in the art will appreciate that has a kind of uplink synchronous control algolithm in the prior art, the computational methods comprising the average of the position at channel impulse response peak are shown below:

X _PEAK(n)＝pX _PEAK(n-1)+(1-p)X _PEAK(n)(2)

Wherein, n is the subframe numbering, X _PEAK(n) be the position of n subframe channel impulse response peak value; X _PEAK(n) be the recursive average of the position at n subframe channel impulse response peak; P is a forgetting factor, and span is the real number between 0 to 1.As seen, this formula utilizes the recurrence averaging method to calculate the average of the position at current subframe channel impulse response peak.

The position of described channel impulse response peak value is the number in prominent footpath.

Launch the delay of the subframe that is numbered n that the pairing uplink special physical channel of downward special physical channel of current special burst sub-frame calculates and count X _Delay(n), can calculate by following formula:

X _Delay(n)＝(X _SS(n)+X _PEAK(n)-PEAK _target)/2，(3)

Wherein, X _SS(n) the UE Synchronization Control adjusted value that adds up of expression, X _SS(0)=0, PEAK _TargetBe the target location of the peak value of the channel impulse response of the pairing UL DPCH of the DL DPCH channel channel of launching described special burst, X _PEAK(n) be the position of peak value of the channel impulse response of n subframe UL DPCH channel.

(X in the formula (3) _SS(n)+X _PEAK(n)-PEAK _Target) calculate for NodeB to UE, again by the time-delay of UE to the such two-way process of NodeB, and the present invention only need consider the situation of one way, so need be divided by 2.

X _SS(n) can calculate by following formula:

$X_{\mathrm{SS}}\left(n\right)=X_{\mathrm{SS}}(n-1)+S{S}_{\mathrm{UL}}^{*}(n-D)*k/8,---\left(4\right)$

Wherein, SS _UL(n) the described uplink special physical channel of expression is represented SS in the uplink synchronous control command that the n subframe generates with 2 bits _UL ^*(n) be the compensating parameter of Synchronization Control, ${\mathrm{SS}}_{\mathrm{UL}}^{*}\left(n\right)=\left\{\begin{array}{cc}1,& S{S}_{\mathrm{UL}}\left(n\right)=11\\ 0,& {\mathrm{SS}}_{\mathrm{UL}}\left(n\right)=01\\ -1,& {\mathrm{SS}}_{\mathrm{UL}}\left(n\right)=00\end{array}\right.$

D is that NodeB generates the time delay of uplink synchronous control command and the time delay sum of UE response uplink synchronous control command.

K is the uplink synchronous Control Parameter, and span is 1 to 8 integer, and this parameter can be by radio network controller (RadioNetwork Controller, RNC) configuration.

Can see X from above-mentioned _SS(n) equal the adding up of numerical value that UE responds the adjustment of the transmitting time that each uplink synchronous control command carried out.

Like this, can obtain X _Delay(n) recursive average.

X _Delay(n) recursive average X _Delay(n) can calculate according to following formula:

X _Delay(n)＝pX _Delay(n-1)+(1-p)X _Delay(n)，(5)

And X _Delay(0)=0.

Have only when UE moves, away from NodeB or near NodeB, the X of different subframes _Delay(n) just can change.Can think that this changing value is directly proportional with the radial displacement that UE takes place.

If m is the subframe number of first second subframe that happens suddenly, n is the numbering of current subframe, and Distance is the radial displacement of current burst sub-frame with respect to first second subframe that happens suddenly, so, consider the delay number of sub-frames of NodeB side calculating downlink transmission power, be designated as D _Ul, can calculate Distance according to following formula:

Distance＝(X _Delay(n-D _ul)-X _Delay(m))*c，(6)

Wherein, c is the light velocity, i.e. the speed aloft propagated of wireless signal; X _Delay(m) be the time delay value of first second subframe that happens suddenly.

Like this, the delay inequality that multiply by current burst sub-frame and first second subframe that happens suddenly according to the light velocity can obtain the radial displacement of current burst sub-frame with respect to first second subframe that happens suddenly.

In addition, because NodeB sends the variation generation uplink synchronous control command of the main footpath of signal with respect to the NodeB radial displacement according to UE, and UE adjusts the time that it sends upward signal according to each uplink synchronous control command, therefore, if know happen suddenly simultaneous bias aggregate-value between second subframe of current burst sub-frame and first, promptly the delay inequality between two subframes just can obtain the radial displacement of current burst sub-frame with respect to first second subframe that happens suddenly.Computing formula is as follows:

$\mathrm{Dis}\tan \mathrm{ce}=c*P_{\mathrm{step}\_\mathrm{SC}}\underset{l=m}{\overset{n-\mathrm{delay}}{\mathrm{\Σ}}}S{S}_{\mathrm{UL}}^{*}\left(l\right),---\left(7\right)$

Wherein, c is the light velocity, P _{Step_SC}Be Synchronization Control step-length, SS _UL ^*(l) be synchronisation offset, m is first second subframe numbering that happens suddenly, (n-delay) current burst sub-frame numbering for considering to postpone,

Be happen suddenly simultaneous bias aggregate-value between second subframe of current burst sub-frame and first.

Like this, Distance can calculate, and in its substitution formula (1), can obtain the value of PathLossIncrement.

Above formula (1) to (7) is that d is the computational methods of PathLossIncrement under the known situation.If d is not known, then can be half of NodeB covering radius with the d value, at this moment, PathLossIncrement can be calculated by following formula:

$\mathrm{PathLossIncrement}=10\mathrm{\μ}\log \left(\frac{\mathrm{Dis}\tan \mathrm{ce}+d}{d}\right)+\mathrm{PowerM}\arg \mathrm{in},---\left(1^{,}\right)$

Linear domain represents then to be following formula:

$\mathrm{PathLossIncrement}={\left(\frac{\mathrm{Dis}\tan \mathrm{ce}+d}{d}\right)}^{\text{u}}\·{10}^{\frac{\mathrm{PowerM}\arg \mathrm{in}}{10}}$

By formula (1 ') as seen, the radial displacement when this moment, the path loss added value was by the current special burst sub-frame of emission during with respect to first special burst second subframe of emission determines jointly with bias of a half-sum of NodeB covering radius.Wherein, described bias can preestablish.

Step 203: the transmitting power that the transmitting power and the described path loss added value sum of described first special burst second subframe is defined as current special burst sub-frame.

The transmitting power of current special burst sub-frame is designated as PowerSB (n), and it can be calculated by following formula:

PowerSB(n)＝PowerFirstSB+PathLossIncrement，(7)

Current special burst sub-frame considers that with this power emission UE moves the path loss variation of bringing in the descending DTX process, like this, can make the transmitting power of special burst sub-frame more accurate.

There is no strict sequencing between described step 201 and the step 202, also can first execution in step 202, back execution in step 201, perhaps step 201 and step 202 while executed in parallel.

Below introduce the second embodiment of the present invention.

If the last special burst of the current special burst that need launch is with reference to special burst, determine the transmitting power of last special burst second subframe of current special burst, and determine the path loss added value of current special burst sub-frame with respect to described last special burst second subframe, with the transmitting power of second subframe of described last special burst and the transmitting power that described path loss added value sum is defined as current special burst sub-frame.Fig. 4 shows the schematic diagram of this embodiment.

With similar among first embodiment, if the distance when launching second subframe of described last special burst between UE and the NodeB is known, then described path loss added value can be determined with described distance jointly by emission radial displacement during with respect to last special burst second subframe of emission during current special burst sub-frame.When described last special burst second subframe of emission, if the distance between UE and the NodeB is unknown, then described path loss added value can be by emission radial displacement during with respect to last special burst second subframe of emission during current special burst sub-frame, determines jointly with bias of a half-sum of NodeB covering radius.

The computational methods among this embodiment and first embodiment are similar, only need first special burst among the descending DTX among first embodiment is replaced with the last special burst of current special burst sub-frame, correspondingly, the transmitting power PowerFirstSB of first special burst second subframe among the descending DTX among first embodiment is replaced with the transmitting power of last special burst second subframe of current special burst sub-frame.Do not repeat them here.

Below introduce the third embodiment of the present invention.

A radio frames is 10ms, is divided into the subframe of two 5ms.In the descending DTX process, special burst periodically sends with radio frames.In the special burst sub-frame emission cycle, UE may with respect to last special burst, not need the transmitting power of current special burst sub-frame is adjusted for a very little value with respect to the radial displacement of NodeB.And only need in the time of several consecutive periods, adjust the transmitting power of current special burst sub-frame.Fig. 5 shows the schematic diagram of this embodiment.

Number every the special burst cycle can preestablish, and establishes it for a, this a special burst cycle total time be made as t.

With similar among first embodiment, when second subframe of the special burst before the current special burst sub-frame on the time t is launched, if the distance between UE and the NodeB is known, then described path loss added value can be determined with described distance jointly by emission radial displacement during with respect to special burst second subframe before t time during current special burst sub-frame.When second subframe of the special burst before the current special burst sub-frame on the time t is launched, if the distance between UE and the NodeB is unknown, then described path loss added value can be by emission radial displacement during with respect to special burst second subframe before t time during current special burst sub-frame, determines jointly with bias of a half-sum of NodeB covering radius.

The computational methods among this embodiment and first embodiment are similar, only need first special burst among the descending DTX among first embodiment is replaced with the current special burst sub-frame temporal special burst of t before, correspondingly, PowerFirstSB replaces with the described current special burst sub-frame transmitting power of the temporal special burst of t before.During descending discontinuous emission, the transmitting power of first special burst is determined by closed-loop power control in the one-period a special burst, and (a-1) the individual special burst after first special burst is all with this first special burst special burst for referencial use.

Below introduce device embodiment provided by the invention.Fig. 6 shows the block diagram of this device embodiment, as shown in the figure:

A kind of device of transmitting power of definite special burst sub-frame is applied in the descending discontinuous emission process, comprises with reference to the special burst second subframe transmitting power determining unit 61, path loss added value computing unit 62, current special burst sub-frame transmitting power computing unit 63, wherein

With reference to the special burst second subframe transmitting power determining unit 61, be used for determining transmitting power with reference to second subframe of special burst;

Path loss added value computing unit 62 is used for determining that current special burst sub-frame is with respect to described path loss added value with reference to special burst second subframe;

Current special burst sub-frame transmitting power determining unit 63 is used for the transmitting power that transmitting power and described path loss added value sum with reference special burst second subframe are defined as current special burst sub-frame.

When the distance when transmitted-reference special burst second subframe between user terminal and base station is known, described path loss added value computing unit 62 distance between user terminal and base station and calculate described path loss added value with respect to the radial displacement of transmitted-reference special burst second subframe when launching current special burst sub-frame during according to transmitted-reference special burst second subframe.

Described path loss added value computing unit (62) is according to following formula calculating path loss added value:

$\mathrm{PathLossIncrement}={\left(\frac{\mathrm{Dis}\tan \mathrm{ce}+d}{d}\right)}^u$

This formula is that linear domain is represented, wherein, u is the channel index, and this value is by system's decision, and span is 2 to 4 real number;

Distance is the radial displacement of user terminal during with respect to second subframe of transmitted-reference special burst in the descending discontinuous emission process during for the current special burst sub-frame of emission;

User terminal when d is second subframe of transmitted-reference special burst and the distance between the base station.

When the distance when transmitted-reference special burst second subframe between user terminal and base station is unknown, described path loss added value computing unit 62 is made as this distance half of described base station covering radius, according to this distance, described path loss added value is calculated in radial displacement and a biasing with respect to transmitted-reference special burst second subframe when launching current special burst sub-frame.

Described path loss added value computing unit (62) is according to following formula calculating path loss added value:

$\mathrm{PathLossIncrement}={\left(\frac{\mathrm{Dis}\tan \mathrm{ce}+d}{d}\right)}^u\·{10}^{\frac{\mathrm{PowerM}\arg \mathrm{in}}{10}}$

This formula is that linear domain is represented, wherein, u is the channel index, and this value is by system's decision, and span is 2 to 4 real number;

Distance is the radial displacement of user terminal during with respect to second subframe of transmitted-reference special burst in the descending discontinuous emission process during for the current special burst sub-frame of emission;

User terminal when d is second subframe of transmitted-reference special burst and the distance between the base station;

PowerMargin is biasing, and unit is dB, can preestablish.

Described path loss added value computing unit 62 comprises radial displacement computing unit 621, and this radial displacement computing unit 621 calculates radial displacement, i.e. Distance by following formula:

Distance＝(X _Delay(n-Dul)-X _Delay(m))*c，

Wherein, D _UlBe that the base station generates the time delay number of sub-frames of down-going synchronous order, m be in the discontinuous emission process with reference to the numbering of second subframe of special burst, c is the light velocity;

N is the numbering of current special burst sub-frame in the discontinuous emission process;

X _Delay(n) be the delay average of the subframe that is numbered n that calculates of the pairing uplink special physical channel of downward special physical channel of the current special burst sub-frame of emission;

Described X _Delay(n) calculate by following formula:

X _Delay(n)＝pX _Delay(n-1)+(1-p)X _Delay(n)，

Wherein, p is a forgetting factor, X _Delay(0)=0, and, X _Delay(n)=(X _SS(n)+X _PEAK(n)-PEAK _Target)/2,

X _SS(n) the user terminal Synchronization Control adjusted value for adding up, X _SS(0)=0, PEAK _TargetBe the target location of the peak value of the channel impulse response of the pairing uplink special physical channel of downward special physical channel of launching described special burst, X _PEAK(n) be the position of peak value of the channel impulse response of n subframe uplink DPCH;

Described X _SS(n) calculate by following formula:

$X_{\mathrm{SS}}\left(n\right)=X_{\mathrm{SS}}(n-1)+S{S}_{\mathrm{UL}}^{*}(n-D)*k/8,$ ${\mathrm{SS}}_{\mathrm{UL}}^{*}\left(n\right)=\left\{\begin{array}{cc}1,& S{S}_{\mathrm{UL}}\left(n\right)=11\\ 0,& {\mathrm{SS}}_{\mathrm{UL}}\left(n\right)=01\\ -1,& {\mathrm{SS}}_{\mathrm{UL}}\left(n\right)=00\end{array}\right.$

Wherein, D is that the base station generates the time delay of uplink synchronous control command and the time delay sum of user terminal response uplink synchronous control command; SS _UL(n) the described uplink special physical channel of expression is in the uplink synchronous control command of n subframe generation, and k is the uplink synchronous Control Parameter, and span is 1 to 8 integer, and this parameter is disposed by radio network controller.

Described path loss added value computing unit 62 comprises radial displacement computing unit 621, and this radial displacement computing unit 621 calculates radial displacement, i.e. Distance by following formula:

$\mathrm{Dis}\tan \mathrm{ce}=c*P_{\mathrm{step}\_\mathrm{SC}}\underset{l=m}{\overset{n-\mathrm{delay}}{\mathrm{\Σ}}}S{S}_{\mathrm{UL}}^{*}\left(l\right)$

Wherein, c is the light velocity, P _{Step_SC}Be Synchronization Control step-length, SS _UL ^*(l) be synchronisation offset, m is first second subframe numbering that happens suddenly, (n-delay) current burst sub-frame numbering for considering to postpone,

Be happen suddenly simultaneous bias aggregate-value between second subframe of current burst sub-frame and first.

Described is second subframe of first special burst in the descending discontinuous emission process with reference to special burst sub-frame; Or be,

Second subframe of the last special burst of the special burst of current emission; Or be,

Second subframe of the special burst in special burst emission cycle before the special burst of current emission, that be separated by preset number.

The device embodiment that using the invention described above provides determines that the method and the preceding method of transmitting power of special burst sub-frame is similar, does not repeat them here.

By above embodiment as seen, the present invention determines in the descending DTX process transmitting power with reference to special burst second subframe, and determine that current special burst sub-frame is with respect to described path loss added value with reference to special burst second subframe, the transmitting power that will be defined as current special burst sub-frame with reference to the transmitting power and the described path loss added value sum of special burst second subframe, like this, the transmitting power of current special burst sub-frame has considered that UE moves the path loss variation of bringing in the descending DTX process, make the transmitting power of special burst sub-frame more accurate, and then improved speech quality in the descending DTX process, reduced call drop.

Claims (11)

1, a kind of method of transmitting power of definite special burst sub-frame is applied to it is characterized in that in the descending discontinuous emission process, comprising:

Determine transmitting power with reference to second subframe of special burst; Determine that current special burst sub-frame is with respect to described path loss added value with reference to special burst second subframe;

The transmitting power that will be defined as current special burst sub-frame with reference to the transmitting power and the described path loss added value sum of special burst second subframe.

2, the method for claim 1 is characterized in that, described definite current special burst sub-frame is realized by following mode with respect to described path loss added value with reference to special burst second subframe:

When the distance when transmitted-reference special burst second subframe between user terminal and base station is known, distance during according to transmitted-reference special burst second subframe between user terminal and base station and calculate described path loss added value with respect to the radial displacement of transmitted-reference special burst second subframe when launching current special burst sub-frame.

3, method as claimed in claim 2 is characterized in that, described path loss added value is calculated by following formula:

$\mathrm{PathLossIncrement}={\left(\frac{\mathrm{Dis}\tan \mathrm{ce}+d}{d}\right)}^u,$

This formula is that linear domain is represented, wherein, u is the channel index, and this value is by system's decision, and span is 2 to 4 real number;

Distance is the radial displacement of user terminal during with respect to second subframe of transmitted-reference special burst in the descending discontinuous emission process during for the current special burst sub-frame of emission;

User terminal when d is second subframe of transmitted-reference special burst and the distance between the base station.

4, the method for claim 1 is characterized in that, described definite current special burst sub-frame is realized by following mode with respect to described path loss added value with reference to special burst second subframe:

When the distance when transmitted-reference special burst second subframe between user terminal and base station is unknown, this distance is made as half of described base station covering radius;

Distance during according to transmitted-reference special burst second subframe between user terminal and base station and when launching current special burst sub-frame radial displacement and the biasing with respect to transmitted-reference special burst second subframe calculate described path loss added value.

5, method as claimed in claim 4 is characterized in that, described path loss added value is calculated by following formula:

$\mathrm{PathLossIncrement}={\left(\frac{\mathrm{Dis}\tan \mathrm{ce}+d}{d}\right)}^u\·{10}^{\frac{\mathrm{PowerM}\arg m}{10}}$

This formula is that linear domain is represented, wherein, u is the channel index, and this value is by system's decision, and span is 2 to 4 real number;

Distance is the radial displacement of user terminal during with respect to second subframe of transmitted-reference special burst in the descending discontinuous emission process during for the current special burst sub-frame of emission;

User terminal when d is second subframe of transmitted-reference special burst and the distance between the base station;

PowerMargin is biasing, and unit is dB, can preestablish.

6, as each described method in the claim 2 to 5, it is characterized in that, described radial displacement, i.e. Distance, calculated by following formula:

Dis?tan?ce＝(X _Delay(n-D _ul)-X _Delay(m))*c，

Wherein, D _UlBe that the base station generates the time delay number of sub-frames of down-going synchronous order, m be in the discontinuous emission process with reference to the numbering of second subframe of special burst, c is the light velocity;

N is the numbering of current special burst sub-frame in the discontinuous emission process;

X _Delay(n) be the delay average of the subframe that is numbered n that calculates of the pairing uplink special physical channel of downward special physical channel of the current special burst sub-frame of emission.

7, method as claimed in claim 6 is characterized in that, X _Delay(n) calculate by following formula:

X _Delay(n)＝pX _Delay(n-1)+(1-p)X _Delay(n)，

Wherein, p is a forgetting factor, X _Delay(0)=0, and, X _Delay(n)=(X _SS(n)+X _PEAK(n)-PEAK _{Targ et})/2,

X _SS(n) the user terminal Synchronization Control adjusted value for adding up, X _SS(0)=0, PEAK _{T arg et}Be the target location of the peak value of the channel impulse response of the pairing uplink special physical channel of downward special physical channel of launching described special burst, X _PEAK(n) be the position of peak value of the channel impulse response of n subframe uplink DPCH.

8, the method for claim 1 is characterized in that, described is second subframe of first special burst in the descending discontinuous emission process with reference to special burst sub-frame; Or be,

Second subframe of the last special burst of the special burst of current emission; Or be,

Second subframe of the special burst in special burst emission cycle before the special burst of current emission, that be separated by preset number.

9, a kind of device of transmitting power of definite special burst sub-frame, be applied in the descending discontinuous emission process, it is characterized in that, comprise with reference to the special burst second subframe transmitting power determining unit (61), path loss added value computing unit (62), current special burst sub-frame transmitting power computing unit (63), wherein

With reference to the special burst second subframe transmitting power determining unit (61), be used for determining transmitting power with reference to second subframe of special burst;

Path loss added value computing unit (62) is used for determining that current special burst sub-frame is with respect to described path loss added value with reference to special burst second subframe;

Current special burst sub-frame transmitting power determining unit (63) is used for the transmitting power that transmitting power and described path loss added value sum with reference special burst second subframe are defined as current special burst sub-frame.

10, device as claimed in claim 9, it is characterized in that, when the distance when transmitted-reference special burst second subframe between user terminal and base station is known, described path loss added value computing unit (62) distance between user terminal and base station and calculate described path loss added value with respect to the radial displacement of transmitted-reference special burst second subframe when launching current special burst sub-frame during according to transmitted-reference special burst second subframe.

11, device as claimed in claim 9, it is characterized in that, when the distance when transmitted-reference special burst second subframe between user terminal and base station is unknown, described path loss added value computing unit (62) is made as this distance half of described base station covering radius, according to this distance, described path loss added value is calculated in radial displacement and a biasing with respect to transmitted-reference special burst second subframe when launching current special burst sub-frame.

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