CN101340215B - 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

Confirm 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 through DPCH.A radio frames comprises two sub-frame.

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, promptly NodeB do not have data burst need through DPCH send to user terminal (User Equipment, 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) burst of order 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 according to the order of the TPC in the information of receiving adjustment once more, 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 up of with disturbing noise.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.To 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 confirm 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 closed power before 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 the power of the special burst sub-frame that causes launching 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, and 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; The power of the special burst sub-frame that causes sending can be littler than needs, can reduce speech quality like this, even may produce call drop.

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, causes call drop or other UE is caused the shortcoming of interference the determining method of launch power of special burst sub-frame to overcome prior art.

For solving the problems of the technologies described above, the present invention provides a kind of method and apparatus of transmitting power of definite special burst sub-frame to be 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:

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

The transmitting power that to confirm as current special burst sub-frame with reference to the transmitting power and the said path loss added value sum of special burst second subframe;

Wherein, said definite current special burst sub-frame is realized by following mode with respect to said 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 said path loss added value with respect to the radial displacement of transmitted-reference special burst second subframe when launching current special burst sub-frame;

When the distance when transmitted-reference special burst second subframe between user terminal and base station is unknown, this distance is made as the half the of said 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 said path loss added value.

Said 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.

Said 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.

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

$\mathrm{Dis}\tan \mathrm{ce}=({\stackrel{\‾}{X}}_{\mathrm{Delay}}(n-D_{\mathrm{ul}})-{\stackrel{\‾}{X}}_{\mathrm{Delay}}\left(m\right))*c,$

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;

is 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.

can be calculated by following formula:

${\stackrel{\‾}{X}}_{\mathrm{Delay}}\left(n\right)=p{\stackrel{\‾}{X}}_{\mathrm{Delay}}(n-1)+(1-p)X_{\mathrm{Delay}}\left(n\right),$

Wherein, p is a forgetting factor,

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 said special burst, X _PEAK(n) be the position of peak value of the channel impulse response of n subframe uplink DPCH.

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

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

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 said 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.

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

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

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

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

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

Second subframe of the special burst of special burst transmit 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 and confirms unit 61; Path loss added value computing unit 62; Current special burst sub-frame transmitting power computing unit 63, wherein

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

Path loss added value computing unit 62; When being used for that the distance between user terminal and base station is known when transmitted-reference special burst second subframe; Distance during according to transmitted-reference special burst second subframe between user terminal and base station and calculate said path loss added value with respect to the radial displacement of transmitted-reference special burst second subframe when launching current special burst sub-frame; When the distance when transmitted-reference special burst second subframe between user terminal and base station is unknown; This distance is made as the half the of said base station covering radius; According to this distance; Said 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;

Current special burst sub-frame transmitting power is confirmed unit 63, is used for the transmitting power of confirming as current special burst sub-frame with reference to the transmitting power and the said path loss added value sum of special burst second subframe.

Said 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.

Said 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.

Said 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:

$\mathrm{Dis}\tan \mathrm{ce}=({\stackrel{\‾}{X}}_{\mathrm{Delay}}(n-D_{\mathrm{ul}})-{\stackrel{\‾}{X}}_{\mathrm{Delay}}\left(m\right))*c,$

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;

is 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;

Said

calculated by following formula:

${\stackrel{\‾}{X}}_{\mathrm{Delay}}\left(n\right)=p{\stackrel{\‾}{X}}_{\mathrm{Delay}}(n-1)+(1-p)X_{\mathrm{Delay}}\left(n\right),$

Wherein, p is a forgetting factor, ${\stackrel{\‾}{X}}_{\mathrm{Delay}}\left(0\right)=0,$ And, X _Delay(n)=(X _SS(n)+X _PEAK(n)-PEAK _{T arg 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 said special burst, X _PEAK(n) be the position of peak value of the channel impulse response of n subframe uplink DPCH;

Said X _SS(n) calculate by following formula:

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

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 said 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.

Said 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:

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

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 current burst sub-frame and first simultaneous bias aggregate-value between second subframe that happens suddenly.

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

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

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

Visible by above technical scheme provided by the invention; The present invention confirms in the descending DTX process transmitting power with reference to special burst second subframe; And confirm current special burst sub-frame with respect to said path loss added value with reference to special burst second subframe, the transmitting power that will confirm as current special burst sub-frame with reference to the transmitting power and the said 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 the 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 confirming in the descending DTX process with reference to special burst second subframe; And confirm current special burst sub-frame with respect to said path loss added value, the transmitting power that will confirm as current special burst sub-frame with reference to the transmitting power and the said path loss added value sum of special burst second subframe with reference to special burst second subframe.Concrete; Can first special burst in the descending DTX process be made as with reference to special burst; Then for confirming the transmitting power of first special burst second subframe; And confirm the path loss added value of current special burst sub-frame with respect to said first special burst second subframe, with the transmitting power of second subframe of said first special burst and the transmitting power that said path loss added value sum is confirmed as current special burst sub-frame.Also can the last special burst of current special burst be made as with reference to special burst; It then is the transmitting power of confirming last special burst second subframe of current special burst; And confirm the path loss added value of current special burst sub-frame with respect to said last special burst second subframe, with the transmitting power of second subframe of said last special burst and the transmitting power that said path loss added value sum is confirmed as current special burst sub-frame.Can also be whenever to confirm the once transmitting power of current special burst sub-frame at a distance from a time period.

In order to make those skilled in the art understand scheme of the present invention better, the present invention is done further detailed description below in conjunction with accompanying drawing and embodiment.

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; Confirm the transmitting power of this first special burst second subframe; And confirm the path loss added value of current special burst sub-frame with respect to said first special burst second subframe, with the transmitting power of second subframe of said first special burst and the transmitting power that said path loss added value sum is confirmed as current special burst sub-frame.

If the distance when launching second subframe of said first special burst between UE and the NodeB is known; Then said path loss added value can be determined with said distance by emission radial displacement during with respect to first special burst second subframe of emission during current special burst sub-frame jointly.If the distance when said first special burst second subframe of emission between UE and the NodeB be the unknown; Then said 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 confirming second subframe of first special burst.

Saidly know that by preceding 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 through closed loop power control algorithm by NodeB.

Step 202: the path loss added value when confirming the current subframe of emission during with respect to said 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 to said 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 need 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 and distance between the NodeB when happening suddenly second subframe of emission, this distance is designated as d.This value NodeB can obtain through network positions service or other method, repeats no more at this.

The calculating of PathLossIncrement also need 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 UE place A, 2 displacements on the NodeB covering radius of B, i.e. radial displacement among the figure.

Then, said path loss added value can computes obtain:

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

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 representes 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:

${\stackrel{\‾}{X}}_{\mathrm{PEAK}}\left(n\right)=p{\stackrel{\‾}{X}}_{\mathrm{PEAK}}(n-1)+(1-p)X_{\mathrm{PEAK}}\left(n\right)---\left(2\right)$

Wherein, n is the subframe numbering, X _PEAK(n) be the position of n subframe channel impulse response peak value;

It is 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.It is thus clear that 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 _t?arg?et)/2， (3)

Wherein, X _SS(n) the UE Synchronization Control adjusted value that adds up of expression, X _SS(0)=0, PEAK _{T arg et}Be 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 said 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 _{T arg et}) 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 be by computes:

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

Wherein, SS _UL(n) the said 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, ${\mathrm{SS}}_{\mathrm{UL}}^{*}\left(n\right)=\left\{\begin{array}{cc}1,& {\mathrm{SS}}_{\mathrm{UL}}\left(n\right)=11\\ 0,& {\mathrm{SS}}_{\mathrm{UL}}\left(n\right)=01\\ -1,& {\mathrm{SS}}_{\mathrm{UL}}\left(n\right)=00\end{array}\right.$

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 of the adjustment of the transmitting time that each uplink synchronous control command of UE response carried out.

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

X _Delay(n) recursive average

Can calculate according to following formula:

${\stackrel{\‾}{X}}_{\mathrm{Delay}}\left(n\right)=p{\stackrel{\‾}{X}}_{\mathrm{Delay}}(n-1)+(1-p)X_{\mathrm{Delay}}\left(n\right),---\left(5\right)$

And ${\stackrel{\‾}{X}}_{\mathrm{Delay}}\left(0\right)=0.$

Have only when UE moves; Away from NodeB or near NodeB,

of different subframes 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:

$\mathrm{Dis}\tan \mathrm{ce}=({\stackrel{\‾}{X}}_{\mathrm{Delay}}(n-D_{\mathrm{ul}})-{\stackrel{\‾}{X}}_{\mathrm{Delay}}\left(m\right))*c,---\left(6\right)$

Wherein, c is the light velocity, i.e. the speed aloft propagated of wireless signal;

is 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 signal according to UE main footpath generates the uplink synchronous control command with respect to the variation of NodeB radial displacement; And UE it sends the time of upward signal according to the adjustment of each uplink synchronous control command, therefore, if know current burst sub-frame and first simultaneous bias aggregate-value between second subframe that happens suddenly; Promptly the delay inequality between two sub-frame just can obtain the radial displacement of current burst sub-frame with respect to first second subframe that happens suddenly.Computing formula is following:

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

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 current burst sub-frame and first simultaneous bias aggregate-value between second subframe that happens suddenly.

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, can be the half the of NodeB covering radius then with the d value, at this moment, PathLossIncrement can be calculated by following formula:

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

Linear domain representes then to be following formula:

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

Visible by formula (1 '), 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 with bias of a half-sum of NodeB covering radius jointly.Wherein, said bias can preestablish.

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

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

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.

Do not have strict sequencing between said 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; Confirm the transmitting power of last special burst second subframe of current special burst; And confirm the path loss added value of current special burst sub-frame with respect to said last special burst second subframe, with the transmitting power of second subframe of said last special burst and the transmitting power that said path loss added value sum is confirmed 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 said last special burst between UE and the NodeB is known; Then said path loss added value can be determined with said distance by emission radial displacement during with respect to last special burst second subframe of emission during current special burst sub-frame jointly.When said last special burst second subframe of emission; If the distance between UE and the NodeB is unknown; Then said 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.Repeat no more at this.

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 transmit cycle, UE possibly with respect to last special burst, need not adjust the transmitting power of current special burst sub-frame for a very little value with respect to the radial displacement of NodeB.And only need whenever in the time of several consecutive periods, the transmitting power of current special burst sub-frame to be adjusted.Fig. 5 shows the schematic diagram of this embodiment.

Every number at a distance from the special burst cycle can preestablish, establish it and be 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 said path loss added value can be determined with said distance by emission radial displacement during with respect to special burst second subframe of t times prior during current special burst sub-frame jointly.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 said path loss added value can be by emission radial displacement during with respect to special burst second subframe of t times prior 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 said 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 confirmed 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, and is 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 and confirms unit 61; Path loss added value computing unit 62; Current special burst sub-frame transmitting power computing unit 63, wherein

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

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

Current special burst sub-frame transmitting power is confirmed unit 63, is used for the transmitting power of confirming as current special burst sub-frame with reference to the transmitting power and the said path loss added value sum of special burst second subframe.

When the distance when transmitted-reference special burst second subframe between user terminal and base station is known; Said path loss added value computing unit 62 distance between user terminal and base station and calculate said 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.

Said 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; Said path loss added value computing unit 62 is made as the half the of said base station covering radius with this distance; According to this distance; Said 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.

Said 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.

Said 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:

$\mathrm{Dis}\tan \mathrm{ce}=({\stackrel{\‾}{X}}_{\mathrm{Delay}}(n-D_{\mathrm{ul}})-{\stackrel{\‾}{X}}_{\mathrm{Delay}}\left(m\right))*c,$

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;

is 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;

Said

calculated by following formula:

${\stackrel{\‾}{X}}_{\mathrm{Delay}}\left(n\right)=p{\stackrel{\‾}{X}}_{\mathrm{Delay}}(n-1)+(1-p)X_{\mathrm{Delay}}\left(n\right),$

Wherein, p is a forgetting factor, ${\stackrel{\‾}{X}}_{\mathrm{Delay}}\left(0\right)=0,$ And, X _Delay(n)=(X _SS(n)+X _PEAK(n)-PEAK _{T arg 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 said special burst, X _PEAK(n) be the position of peak value of the channel impulse response of n subframe uplink DPCH;

Said X _SS(n) calculate by following formula:

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

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 said 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.

Said 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:

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

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 current burst sub-frame and first simultaneous bias aggregate-value between second subframe that happens suddenly.

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

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

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

The device embodiment that using the invention described above provides confirms that the method and the preceding method of transmitting power of special burst sub-frame is similar, repeats no more at this.

Visible by above embodiment; The present invention confirms in the descending DTX process transmitting power with reference to special burst second subframe; And confirm current special burst sub-frame with respect to said path loss added value with reference to special burst second subframe, the transmitting power that will confirm as current special burst sub-frame with reference to the transmitting power and the said 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 the speech quality in the descending DTX process, reduced call drop.

Claims (7)

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

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

The transmitting power that to confirm as current special burst sub-frame with reference to the transmitting power and the said path loss added value sum of special burst second subframe;

Wherein, said definite current special burst sub-frame is realized by following mode with respect to said 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 said path loss added value with respect to the radial displacement of transmitted-reference special burst second subframe when launching current special burst sub-frame;

When the distance when transmitted-reference special burst second subframe between user terminal and base station is unknown, this distance is made as the half the of said 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 said path loss added value.

2. the method for claim 1 is characterized in that, said 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.

3. the method for claim 1 is characterized in that, said 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 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.

4. like each described method in the claim 1 to 3, it is characterized in that, said radial displacement, i.e. Distance, calculated by following formula:

$\mathrm{Dis}\tan \mathrm{ce}=({\stackrel{\‾}{X}}_{\mathrm{Delay}}(n-D_{\mathrm{ul}})-{\stackrel{\‾}{X}}_{\mathrm{Delay}}\left(m\right))*c,$

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;

is 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.

5. method as claimed in claim 4; It is characterized in that

calculated by following formula:

${\stackrel{\‾}{X}}_{\mathrm{Delay}}\left(n\right)=p{\stackrel{\‾}{X}}_{\mathrm{Delay}}(n-1)+(1-p)X_{\mathrm{Delay}}\left(n\right),$

Wherein, p is a forgetting factor,

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 said special burst, X _PEAK(n) be the position of peak value of the channel impulse response of n subframe uplink DPCH.

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

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

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

7. the device of the transmitting power of a definite special burst sub-frame; Be applied to it is characterized in that in the descending discontinuous emission process, comprise with reference to the special burst second subframe transmitting power and confirm unit (61); Path loss added value computing unit (62); Current special burst sub-frame transmitting power computing unit (63), wherein

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

Path loss added value computing unit (62); When being used for that the distance between user terminal and base station is known when transmitted-reference special burst second subframe; Distance during according to transmitted-reference special burst second subframe between user terminal and base station and calculate said path loss added value with respect to the radial displacement of transmitted-reference special burst second subframe when launching current special burst sub-frame; When the distance when transmitted-reference special burst second subframe between user terminal and base station is unknown; This distance is made as the half the of said base station covering radius; According to this distance; Said 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;

Current special burst sub-frame transmitting power is confirmed unit (63), is used for the transmitting power of confirming as current special burst sub-frame with reference to the transmitting power and the said path loss added value sum of special burst second subframe.

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