CN101741436A - Power control method and equipment - Google Patents

Power control method and equipment Download PDF

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Publication number
CN101741436A
CN101741436A CN200810226301A CN200810226301A CN101741436A CN 101741436 A CN101741436 A CN 101741436A CN 200810226301 A CN200810226301 A CN 200810226301A CN 200810226301 A CN200810226301 A CN 200810226301A CN 101741436 A CN101741436 A CN 101741436A
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China
Prior art keywords
data
tpc
power
parameter
power control
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CN200810226301A
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Chinese (zh)
Inventor
郭保娟
朱向前
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China Academy of Telecommunications Technology CATT
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Datang Mobile Communications Equipment Co Ltd
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Priority to CN200810226301A priority Critical patent/CN101741436A/en
Publication of CN101741436A publication Critical patent/CN101741436A/en
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

The invention discloses a power control method and equipment. The method comprises the following steps: when a receiver receives data, determining a transmission power control (TPC) parameter according to the signal-to-noise ratio; when the receiver does not receive the data, if an unsent effective power control command exists, determining the TPC parameter according to the TPC in the power control command, and if the unsent effective power control command does not exist, determining the TPC parameter according to the predetermined mode; and sending the determined TPC parameter to a sender. The invention can be used for improving the power control effect of a channel and improving the system performance.

Description

Poewr control method and equipment
Technical field
The present invention relates to the communication technology, be specifically related to a kind of Poewr control method and equipment.
Background technology
In code division multiple access (CDMA, Code Division Multipul Access) communication system, all users use identical frequency range to send information simultaneously, so the multiple access interference effect is bigger, reduce multiple access and disturb the key that has also just become to increase power system capacity.Research and practice show that power control can be eliminated near-far interference effectively and reduce and disturb, and increase power system capacity and better quality of service is provided.So the effect quality of power control directly has influence on the performance of system.
In the prior art, (DPCH, Dedicated Physical Channel) is example with DPCH, and open loop+closed-loop fashion is adopted in power control, respectively the power of uplink and downlink DPCH controlled below and carried out brief description.
One, up DPCH Poewr control method:
Initialization is the open loop power control mode, measure path loss by network side configuration expectation received power and terminal and obtain initial transmission power, terminal changes the closed-loop power control mode over to then, control (TPC by the through-put power that descending DPCH carries, Transmit Power Control) parameter system, if TPC is set to " up ", then the transmitted power of up DPCH increases a power step size, if TPC is set to " down ", then the transmitted power of up DPCH reduces a power step size, power step size is determined by high-rise radio network controller (RNC, Radio Network Controller).When under the situation that does not have relevant upstream data emission between two corresponding downstream TPC orders, UE should ignore corresponding TPC order.The right transmitted power of next time slot should select following method to be provided with:
(1) according to the performance number setting of previous uplink, the change amount with the path loss of up transmission interval observation compensates then; Perhaps
(2) use open loop control to be provided with as initial transmission.
The UE decision should be used above which kind of method, wherein should using method (1) for short transmission intercal.
Two, descending DPCH Poewr control method:
Initial transmission power is determined by high-rise (RNC), change the closed-loop power control mode then over to, terminal obtains TPC according to the signal to noise ratio of the descending DPCH channel measurement that receives, and sends to the base station by up DPCH, and the transmitted power of descending DPCH is adjusted in the base station according to the TPC state of receiving.If TPC is set to " up ", then the transmitted power of descending DPCH increases a power step size, if TPC is set to " down ", then the transmitted power of descending DPCH reduces a power step size, and power step size is determined by high-rise (RNC).If descending free of data sends, then the TPC order of corresponding free of data sending time slots should be ignored in the base station.
In the above-mentioned power control process, when not having data to send, how how transmit leg ignores TPC and recipient responds TPC and does not all offer some clarification on, make each producer in implementation procedure because protocol description is unclear, cause and realize inconsistent phenomenon; In addition, for base station down be sent in restore data send after initial power how to be provided with, existing protocol does not have clear and definite solution yet.And in real system, owing to the data instability, some frame can not have data to send in the business data transmission process, can cause the influence to power control like this, influences systematic function.
Summary of the invention
The invention provides a kind of Poewr control method and equipment, to improve the power control effect of channel, elevator system performance.
For this reason, the invention provides following technical scheme:
A kind of Poewr control method comprises:
When the recipient receives data, determine through-put power control TPC parameter according to signal to noise ratio;
When not receiving data,, then determine the TPC parameter, otherwise determine the TPC parameter by predetermined way according to the TPC in the described power control commands if there is the effective power control commands of not sending;
The TPC parameter of determining is sent to transmit leg.
Preferably, describedly determine that according to signal to noise ratio the TPC parameter is according to comprising:
If the signal to noise ratio of measuring is down with TPC parameter assignment then greater than desired value, otherwise be up with TPC parameter assignment, described down represents power step size of adjusting power down, and described up represents power step size of adjusting power.
Alternatively, describedly determine that by predetermined way the TPC parameter comprises:
Produce described TPC parameter at random; Perhaps
TPC with reference to the time slot that has data to send determines described TPC parameter; Perhaps
Giving TPC parameter assignment is that up and down replace, and described down represents power step size of adjusting power down, and described up represents power step size of adjusting power.
Alternatively, described recipient is the base station, and described transmit leg is a terminal; Perhaps described recipient is a terminal, and described transmit leg is the base station.
A kind of Poewr control method comprises:
Transmit leg receives through-put power control TPC parameter;
If current free of data transmission, the then described TPC parameter of normal response in the predetermined subframe after current free of data sends beginning;
In sending described predetermined subframe after the beginning, restore data do not respond described TPC parameter after the described predetermined subframe after current free of data sends beginning.
Preferably, described method also comprises:
In the described predetermined subframe after the transmit leg restore data transmission beginning, send the transmission intercal that begins to restore data sends between the beginning according to free of data and determine required transmitted power.
Alternatively, described transmit leg is a terminal; Describedly determine that according to described transmission intercal required transmitted power comprises:
If described transmission intercal smaller or equal to first threshold value, is then determined required transmitted power P New=P Old+ Δ L, wherein P OldFor send the definite transmitted power of TPC parameter that response receives in the described predetermined subframe after beginning from free of data, Δ L is for obtaining P OldSubframe to P NewSubframe between path loss difference;
If described transmission intercal greater than first threshold value, is then determined required transmitted power according to open Loop Power control.
Alternatively, described transmit leg is the base station, describedly determines that according to described transmission intercal required transmitted power comprises:
If described transmission intercal is smaller or equal to second threshold value, determine that then required transmitted power be to send the definite transmitted power of TPC parameter that response receives in the described predetermined subframe after the beginning from free of data;
If described transmission intercal is greater than second thresholding, and other all time slots all do not have data to send, and determine that then required transmitted power is an initial power;
If described transmission intercal is greater than second thresholding, and the part time slot does not have data to send in other time slots, determines that then required transmitted power is P New=P Old+ sum (TPC)+Δ P, wherein P OldFor send the definite transmitted power of TPC parameter that response receives in the described predetermined subframe after beginning from free of data, sum (TPC) in other time slots from described free of data adding up of sending after the described predetermined subframe after the beginning that TPC that the time slot that data send is continuously arranged to continuous a plurality of subframes of current subframe adjusts and, Δ P is a power headroom.
A kind of power control apparatus comprises:
The Data Receiving unit is used to receive data;
The parameter determining unit is used for determining through-put power control TPC parameter, when receiving data in described Data Receiving unit, determines through-put power control TPC parameter according to signal to noise ratio; When described Data Receiving unit does not receive data,, then determine the TPC parameter, otherwise determine the TPC parameter by predetermined way according to the TPC in the described power control commands if there is the effective power control commands of not sending;
The parameter transmitting element, the TPC parameter that is used for determining sends to transmit leg.
Preferably, also comprise:
The snr measurement unit is used for carrying out snr measurement according to the data that the Data Receiving unit receives;
Described parameter determining unit is when determining the TPC parameter according to signal to noise ratio, if the signal to noise ratio that described snr measurement unit is measured is greater than desired value, be down then with TPC parameter assignment, otherwise with TPC parameter assignment is up, described down represents power step size of adjusting power down, and described up represents power step size of adjusting power.
Alternatively, describedly determine that by predetermined way the TPC parameter comprises:
Produce described TPC parameter at random; Perhaps
TPC with reference to the time slot that has data to send determines described TPC parameter; Perhaps
Giving TPC parameter assignment is that up and down replace, and described down represents power step size of adjusting power down, and described up represents power step size of adjusting power.
Alternatively, described power control apparatus is specially base station or terminal.
A kind of power control apparatus comprises:
The parameter receiving element is used to receive through-put power control TPC parameter;
Data transmission unit is used for sending data to the recipient;
The parameter response unit, be used for responding according to the current TPC parameter that whether has data to send described parameter receiving element is received of described data transmission unit, if current free of data transmission, the then described TPC parameter of normal response in the predetermined subframe after current free of data sends beginning; In sending described predetermined subframe after the beginning, restore data do not respond described TPC parameter after the predetermined subframe after current free of data sends beginning.
Preferably, also comprise:
The transmitted power determining unit is used in the described predetermined subframe after described data transmission unit restore data sends beginning, sends the transmission intercal that begins to restore data sends between the beginning according to free of data and determines required transmitted power.
Alternatively, described power control apparatus is specially terminal; Described transmitted power determining unit comprises:
First judgment sub-unit is used to judge that whether described transmission intercal is smaller or equal to threshold value;
First determines subelement, is used for the judged result according to described first judgment sub-unit, determines the transmitted power after described data transmission unit restore data sends, if described transmission intercal smaller or equal to first threshold value, is then determined required transmitted power P New=P Old+ Δ L, wherein P OldFor send the definite transmitted power of TPC parameter that response receives in the described predetermined subframe after beginning from free of data, Δ L is for obtaining P OldSubframe to P NewSubframe between path loss difference; If described transmission intercal greater than first threshold value, is then determined required transmitted power according to open Loop Power control.
Alternatively, described power control apparatus is specially the base station, and described transmitted power determining unit comprises:
Second judgment sub-unit is used to judge that whether described transmission intercal is smaller or equal to threshold value;
Second determines subelement, be used for judged result according to described first judgment sub-unit, determine the transmitted power after described data transmission unit restore data sends, if described transmission intercal is smaller or equal to second threshold value, determine that then required transmitted power be to send the definite transmitted power of TPC parameter that response receives in the described predetermined subframe after the beginning from free of data; If described transmission intercal is greater than second thresholding, and other all time slots all do not have data to send, and determine that then required transmitted power is an initial power; If described transmission intercal is greater than second thresholding, and the part time slot does not have data to send in other time slots, determines that then required transmitted power is P New=P Old+ sum (TPC)+Δ P, wherein P OldFor send the definite transmitted power of TPC parameter that response receives in the described predetermined subframe after beginning from free of data, sum (TPC) in other time slots from described free of data adding up of sending after the described predetermined subframe after the beginning that TPC that the time slot that data send is continuously arranged to continuous a plurality of subframes of current subframe adjusts and, Δ P is a power headroom.
Poewr control method of the present invention is when the recipient receives data, determine the TPC parameter according to signal to noise ratio, when not receiving data, if there is the effective power control commands of not sending, then determine the TPC parameter, otherwise determine the TPC parameter, and the TPC parameter of determining is sent to transmit leg by predetermined way according to the TPC in the described power control commands, thereby can make the recipient when not receiving data, can produce TPC effectively; For transmit leg, after receiving the TPC parameter, if current free of data sends, the described TPC parameter of normal response in the predetermined subframe after current free of data sends beginning then, in sending described predetermined subframe after the beginning, restore data do not respond described TPC parameter after the described predetermined subframe after current free of data sends beginning, thereby can improve the power control effect of channel better, the elevator system performance.
Description of drawings
Fig. 1 is the flow chart of Poewr control method first embodiment of the present invention;
Fig. 2 is the flow chart that Poewr control method of the present invention second is executed example;
Fig. 3 is the flow chart of Poewr control method the 3rd embodiment of the present invention;
Fig. 4 is the flow chart of Poewr control method the 4th embodiment of the present invention;
Fig. 5 is the flow chart of Poewr control method the 5th embodiment of the present invention;
Fig. 6 is the flow chart of Poewr control method the 6th embodiment of the present invention;
Fig. 7 is the structural representation of power control apparatus first embodiment of the present invention;
Fig. 8 is the structural representation of power control apparatus second embodiment of the present invention.
Embodiment
The embodiment of the invention is in the power control process, and under the situation of the discontinuous transmission of data, how how transmit leg ignores TPC parameter and recipient responds the TPC parameter concrete solution is provided.For the recipient, when receiving data, determine through-put power control TPC parameter according to signal to noise ratio; When not receiving data,, then determine the TPC parameter, otherwise determine the TPC parameter by predetermined way according to the TPC in the described power control commands if there is the effective power control commands of not sending.For transmit leg, when receiving the TPC parameter; If current free of data transmission, the then described TPC parameter of normal response in the predetermined subframe after current free of data sends beginning; In sending described predetermined subframe after the beginning, restore data do not respond described TPC parameter after the described predetermined subframe after current free of data sends beginning.The Poewr control method of the embodiment of the invention and equipment are not only applicable to the processing of terminal to the TPC parameter, and are applicable to the processing of base station to the TPC parameter.
In order to make those skilled in the art person understand the scheme of the embodiment of the invention better, the embodiment of the invention is described in further detail below in conjunction with drawings and embodiments.
Among each embodiment below, be that example describes with DPCH, but the present invention is not limited to this channel, but is applicable to that all the scene of the discontinuous transmission of data can occur.
With reference to Fig. 1, be the flow chart of Poewr control method first embodiment of the present invention.
This embodiment has described the process of up DPCH power control, specifically is the flow process that base station side produces TPC.
Step 101, the base station receives upstream data;
Step 102, base station judge whether to receive up DPCH; If then execution in step 104; Otherwise execution in step 103;
The base station can judge whether to receive up DPCH according to activating detection or other modes;
Step 103 is determined the TPC parameter by predetermined way, particularly, can be to produce described TPC parameter at random; Perhaps the TPC with reference to the time slot that has data to send determines described TPC parameter; Perhaps giving TPC parameter assignment is that up and down replace, and described down represents power step size of adjusting power down, and described up represents power step size of adjusting power; Execution in step 107 then;
Whether step 104 judges the signal to noise ratio snr of measuring greater than desired value, and this desired value can be determined according to emulation or empirical value; If then execution in step 105; Otherwise execution in step 106;
Step 105 is down with TPC parameter assignment, and described down represents power step size of adjusting power down; Execution in step 107 then;
Step 106 is up with TPC parameter assignment, and described up represents power step size of adjusting power;
Step 107 sends the TPC parameter of determining to terminal by descending DPCH.
With reference to Fig. 2, be the flow chart that Poewr control method of the present invention second is executed example.
This embodiment has described the process of up DPCH power control, specifically is the responding process of end side to the TPC of acquisition.
Step 201, terminal receive descending DPCH, obtain the TPC parameter;
Step 202 judges whether current subframe is to send N subframe (predetermined subframe) back of beginning or have data to send in the N subframe of beginning in current free of data; If then execution in step 203; Otherwise execution in step 204; The numerical value of N can be determined according to the specific implementation of communication system;
Step 203, terminal do not respond the TPC of acquisition;
Step 204, the TPC that terminal response obtains, response mode is same as the prior art.
With reference to Fig. 3, be the flow chart that Poewr control method the 3rd of the present invention is executed example.
This embodiment has described the process of up DPCH power control, the control flow of the terminal transmitted power when specifically being terminal recovery transmission data.
Step 301, terminal resends data;
Step 302 judges that the front does not send the interval of data, and promptly free of data sends and begins whether to send transmission intercal between the beginning smaller or equal to first threshold value to restore data; If then execution in step 303; Otherwise execution in step 304; Described first threshold value can be determined by emulation;
Step 303 is determined required transmitted power P New=P Old+ Δ L, wherein P OldFor send the definite transmitted power of TPC parameter that response receives in the N subframe after beginning from free of data, Δ L is for obtaining P OldSubframe to P NewSubframe between path loss difference;
Step 304 is determined required transmitted power according to open Loop Power control.
In the embodiment of above-mentioned DPCH power control, base station side is not when receiving upstream data, this subframe can not produce effective TPC parameter, and terminal will be ignored the up corresponding TPC parameter that the data period receives that do not send, so the power control commands of base station can produce arbitrarily.When terminal does not send upstream data in continuous a period of time, then send in the N subframe of beginning from free of data, corresponding time slot continues the TPC parameter of response reception; No longer respond the TPC parameter that receives afterwards, in the N subframe after terminal is recovered the upstream data transmission.In the N subframe after terminal is recovered the upstream data transmission, send the transmission intercal that begins to restore data sends between the beginning according to free of data and determine required transmitted power.
As seen, the embodiment of the invention is to when not having data to send, and for up channel, terminal disregards TPC and base station produce the processing of TPC to be optimized, thereby can improve the power control effect of channel better, has promoted systematic function.
With reference to Fig. 4, be the flow chart of Poewr control method the 4th embodiment of the present invention:
This embodiment has described the process of descending DPCH power control, specifically is the flow process that end side produces TPC.
Step 401, the terminal downlink data receiving;
Step 402, whether terminal judges receives descending DPCH; If then execution in step 404; Otherwise execution in step 403;
Terminal can judge whether to receive descending DPCH according to activating detection or other modes;
Step 403 is determined the TPC parameter by predetermined way, particularly, can be to produce described TPC parameter at random; Perhaps the TPC with reference to the time slot that has data to send determines described TPC parameter; Perhaps giving TPC parameter assignment is that up and down replace, and described down represents power step size of adjusting power down, and described up represents power step size of adjusting power; Execution in step 407 then;
Whether step 404 judges the signal to noise ratio snr of measuring greater than desired value, and this desired value can be determined according to emulation or empirical value; If then execution in step 405; Otherwise execution in step 406;
Step 405 is down with TPC parameter assignment, and described down represents power step size of adjusting power down; Execution in step 407 then;
Step 406 is up with TPC parameter assignment, and described up represents power step size of adjusting power;
Step 407 sends the TPC parameter of determining to terminal by up DPCH.
With reference to Fig. 5, be the flow chart that Poewr control method the 5th of the present invention is executed example.
This embodiment has described the process of descending DPCH power control, specifically is the responding process of base station side to the TPC of acquisition.
Step 501, base station receive up DPCH, obtain the TPC parameter;
Step 502 judges whether current subframe is to send N subframe (predetermined subframe) back of beginning or have data to send in the N subframe of beginning in current free of data; If then execution in step 503; Otherwise execution in step 504; The numerical value of N can be determined according to the specific implementation of communication system;
Step 503, base station do not respond the TPC of acquisition;
Step 504, the TPC that base station in response obtains, response mode is same as the prior art.
With reference to Fig. 6, be the flow chart that Poewr control method the 6th of the present invention is executed example.
This embodiment has described the process of descending DPCH power control, the control flow of the terminal transmitted power when specifically being base station recovery transmission data.
Step 601, the base station resends data;
Step 602 judges that the front does not send the interval of data, and promptly free of data sends and begins whether to send transmission intercal between the beginning smaller or equal to second threshold value to restore data; If then execution in step 603; Otherwise execution in step 604; Described second threshold value can be determined by emulation;
Step 603 is determined required transmitted power P New=P Old, P wherein OldFor send the definite transmitted power of TPC parameter that response receives in the N subframe after beginning from free of data;
Step 604 judges whether other all time slots all do not have data to send; If then execution in step 605; Otherwise execution in step 606;
Step 605 determines that required transmitted power is initial power, i.e. P New=P Init
Step 606 determines that required transmitted power is P New=P Old+ sum (TPC)+Δ P, wherein P OldFor send the definite transmitted power of TPC parameter that response receives in the N subframe after beginning from free of data, sum (TPC) in other time slots from described free of data adding up of sending after the N subframe after the beginning that TPC that the time slot that data send is continuously arranged to continuous a plurality of subframes of current subframe adjusts and, Δ P is a power headroom.
In the embodiment of above-mentioned DPCH power control, end side is not when receiving downlink data, this subframe can not produce effective TPC parameter, and the descending corresponding TPC parameter that the data period receives that do not send will be ignored in the base station, so the power control commands of terminal can produce arbitrarily.When the base station does not send downlink data in continuous a period of time, then send in the N subframe of beginning from free of data, corresponding time slot continues the TPC parameter of response reception; No longer respond the TPC parameter that receives afterwards, in the N subframe after the downlink data transmission is recovered in the base station.In the N subframe after the downlink data transmission is recovered in the base station, send the transmission intercal that begins to restore data sends between the beginning according to free of data and determine required transmitted power.
As seen, the embodiment of the invention is to when not having data to send, and for down channel, the base station is ignored the processing that TPC and terminal produce TPC and optimized, thereby can improve the power control effect of channel better, has promoted systematic function.
One of ordinary skill in the art will appreciate that all or part of step that realizes in the foregoing description method is to instruct relevant hardware to finish by program, described program can be stored in the computer read/write memory medium, described storage medium, as: ROM/RAM, magnetic disc, CD etc.
The embodiment of the invention also provides a kind of power control apparatus, as shown in Figure 7, is the structural representation of this power control apparatus first embodiment.
This power control apparatus comprises: Data Receiving unit 701, parameter determining unit 702 and parameter transmitting element 703 also can further comprise snr measurement unit 704.Wherein:
Data Receiving unit 701 is used to receive data; Parameter determining unit 702 is used for determining the TPC parameter, when receiving data in Data Receiving unit 701, determines the TPC parameter according to signal to noise ratio; When Data Receiving unit 701 does not receive data,, then determine the TPC parameter, otherwise determine the TPC parameter by predetermined way according to the TPC in the described power control commands if there is the effective power control commands of not sending; Parameter transmitting element 703, the TPC parameter that is used for determining sends to transmit leg.Describedly determine that by predetermined way the TPC parameter comprises: produce described TPC parameter at random; Perhaps the TPC with reference to the time slot that has data to send determines described TPC parameter; Perhaps giving TPC parameter assignment is that up and down replace, and described down represents power step size of adjusting power down, and described up represents power step size of adjusting power.
Snr measurement unit 704 is used for carrying out snr measurement according to the data that Data Receiving unit 701 receives.Like this, parameter determining unit 702 is when determining the TPC parameter according to signal to noise ratio, if the signal to noise ratio that snr measurement unit 704 is measured is greater than desired value, be down then with TPC parameter assignment, otherwise with TPC parameter assignment is up, described down represents power step size of adjusting power down, and described up represents power step size of adjusting power.
The power control apparatus of this embodiment specifically can be base station or terminal.
As shown in Figure 8, be the structural representation of this power control apparatus second embodiment.
This power control apparatus comprises: parameter receiving element 801, data transmission unit 802 and parameter response unit 803.Also can further comprise: transmitted power determining unit 804.Wherein:
Parameter receiving element 801 is used to receive the TPC parameter; Data transmission unit 802 is used for sending data to the recipient; Parameter response unit 803, be used for responding according to the data transmission unit 802 current TPC parameters that whether have data to send parameter receiving element 801 is received, if current free of data transmission, the then described TPC parameter of normal response in the predetermined subframe after current free of data sends beginning; In sending described predetermined subframe after the beginning, restore data do not respond described TPC parameter after the predetermined subframe after current free of data sends beginning.Transmitted power determining unit 804 is used in the described predetermined subframe after data transmission unit 802 restore data send beginning, sends the transmission intercal that begins to restore data sends between the beginning according to free of data and determines required transmitted power.
The power control apparatus of this embodiment specifically can be terminal or base station, and for terminal and base station, the specific implementation of transmitted power determining unit is slightly different, will describe respectively below.
When described power control apparatus was used as terminal, transmitted power determining unit 804 comprised: first judgment sub-unit and first is determined the subelement (not shown).Wherein, first judgment sub-unit is used to judge that whether described transmission intercal is smaller or equal to threshold value; First determines subelement, is used for the judged result according to described first judgment sub-unit, determines the transmitted power after described data transmission unit restore data sends, if described transmission intercal smaller or equal to first threshold value, is then determined required transmitted power P New=P Old+ Δ L, wherein P OldFor send the definite transmitted power of TPC parameter that response receives in the described predetermined subframe after beginning from free of data, Δ L is for obtaining P OldSubframe to P NewSubframe between path loss difference; If described transmission intercal greater than first threshold value, is then determined required transmitted power according to open Loop Power control.
When described power control apparatus was used as the base station, transmitted power determining unit 804 comprised: second judgment sub-unit and second is determined the subelement (not shown).Wherein, second judgment sub-unit is used to judge that whether described transmission intercal is smaller or equal to threshold value; Second determines subelement, be used for judged result according to described first judgment sub-unit, determine the transmitted power after described data transmission unit restore data sends, if described transmission intercal is smaller or equal to second threshold value, determine that then required transmitted power be to send the definite transmitted power of TPC parameter that response receives in the described predetermined subframe after the beginning from free of data; If described transmission intercal is greater than second thresholding, and other all time slots all do not have data to send, and determine that then required transmitted power is an initial power; If described transmission intercal is greater than second thresholding, and the part time slot does not have data to send in other time slots, determines that then required transmitted power is P New=P Old+ sum (TPC)+Δ P, wherein P OldFor send the definite transmitted power of TPC parameter that response receives in the described predetermined subframe after beginning from free of data, sum (TPC) in other time slots from described free of data adding up of sending after the N subframe after the beginning that TPC that the time slot that data send is continuously arranged to continuous a plurality of subframes of current subframe adjusts and, Δ P is a power headroom.
Wherein, described first thresholding and second thresholding can determine that these two values can be identical according to concrete applied environment, also can be different.
As seen, utilize embodiment of the invention power control apparatus, when not having data to send, no matter be for down channel or up channel, the recipient produces the processing of TPC and transmit leg response TPC and optimizes, thereby can improve the power control effect of channel better, promote systematic function.
More than the embodiment of the invention is described in detail, used embodiment herein the present invention set forth, the explanation of above embodiment just is used for help understanding method and apparatus of the present invention; Simultaneously, for one of ordinary skill in the art, according to thought of the present invention, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention.

Claims (16)

1. a Poewr control method is characterized in that, comprising:
When the recipient receives data, determine through-put power control TPC parameter according to signal to noise ratio;
When not receiving data,, then determine the TPC parameter, otherwise determine the TPC parameter by predetermined way according to the TPC in the described power control commands if there is the effective power control commands of not sending;
The TPC parameter of determining is sent to transmit leg.
2. method according to claim 1 is characterized in that, describedly determines that according to signal to noise ratio the TPC parameter is according to comprising:
If the signal to noise ratio of measuring is down with TPC parameter assignment then greater than desired value, otherwise be up with TPC parameter assignment, described down represents power step size of adjusting power down, and described up represents power step size of adjusting power.
3. method according to claim 1 is characterized in that, describedly determines that by predetermined way the TPC parameter comprises:
Produce described TPC parameter at random; Perhaps
TPC with reference to the time slot that has data to send determines described TPC parameter; Perhaps
Giving TPC parameter assignment is that up and down replace, and described down represents power step size of adjusting power down, and described up represents power step size of adjusting power.
4. according to each described method of claim 1 to 3, it is characterized in that:
Described recipient is the base station, and described transmit leg is a terminal; Perhaps
Described recipient is a terminal, and described transmit leg is the base station.
5. a Poewr control method is characterized in that, comprising:
Transmit leg receives through-put power control TPC parameter;
If current free of data transmission, the then described TPC parameter of normal response in the predetermined subframe after current free of data sends beginning;
In sending described predetermined subframe after the beginning, restore data do not respond described TPC parameter after the described predetermined subframe after current free of data sends beginning.
6. method according to claim 5 is characterized in that, described method also comprises:
In the described predetermined subframe after the transmit leg restore data transmission beginning, send the transmission intercal that begins to restore data sends between the beginning according to free of data and determine required transmitted power.
7. method according to claim 6 is characterized in that, described transmit leg is a terminal; Describedly determine that according to described transmission intercal required transmitted power comprises:
If described transmission intercal smaller or equal to first threshold value, is then determined required transmitted power P New=P Old+ Δ L, wherein P OldFor send the definite transmitted power of TPC parameter that response receives in the described predetermined subframe after beginning from free of data, Δ L is for obtaining P OldSubframe to P NewSubframe between path loss difference;
If described transmission intercal greater than first threshold value, is then determined required transmitted power according to open Loop Power control.
8. method according to claim 6 is characterized in that, described transmit leg is the base station, describedly determines that according to described transmission intercal required transmitted power comprises:
If described transmission intercal is smaller or equal to second threshold value, determine that then required transmitted power be to send the definite transmitted power of TPC parameter that response receives in the described predetermined subframe after the beginning from free of data;
If described transmission intercal is greater than second thresholding, and other all time slots all do not have data to send, and determine that then required transmitted power is an initial power;
If described transmission intercal is greater than second thresholding, and the part time slot does not have data to send in other time slots, determines that then required transmitted power is P New=P Old+ sum (TPC)+Δ P, wherein P OldFor send the definite transmitted power of TPC parameter that response receives in the described predetermined subframe after beginning from free of data, sum (TPC) in other time slots from described free of data adding up of sending after the described predetermined subframe after the beginning that TPC that the time slot that data send is continuously arranged to continuous a plurality of subframes of current subframe adjusts and, Δ P is a power headroom.
9. a power control apparatus is characterized in that, comprising:
The Data Receiving unit is used to receive data;
The parameter determining unit is used for determining through-put power control TPC parameter, when receiving data in described Data Receiving unit, determines through-put power control TPC parameter according to signal to noise ratio; When described Data Receiving unit does not receive data,, then determine the TPC parameter, otherwise determine the TPC parameter by predetermined way according to the TPC in the described power control commands if there is the effective power control commands of not sending;
The parameter transmitting element, the TPC parameter that is used for determining sends to transmit leg.
10. power control apparatus according to claim 9 is characterized in that, also comprises:
The snr measurement unit is used for carrying out snr measurement according to the data that the Data Receiving unit receives;
Described parameter determining unit is when determining the TPC parameter according to signal to noise ratio, if the signal to noise ratio that described snr measurement unit is measured is greater than desired value, be down then with TPC parameter assignment, otherwise with TPC parameter assignment is up, described down represents power step size of adjusting power down, and described up represents power step size of adjusting power.
11. power control apparatus according to claim 9 is characterized in that, describedly determines that by predetermined way the TPC parameter comprises:
Produce described TPC parameter at random; Perhaps
TPC with reference to the time slot that has data to send determines described TPC parameter; Perhaps
Giving TPC parameter assignment is that up and down replace, and described down represents power step size of adjusting power down, and described up represents power step size of adjusting power.
12., it is characterized in that described power control apparatus is specially base station or terminal according to each described power control apparatus of claim 9 to 11.
13. a power control apparatus is characterized in that, comprising:
The parameter receiving element is used to receive through-put power control TPC parameter;
Data transmission unit is used for sending data to the recipient;
The parameter response unit, be used for responding according to the current TPC parameter that whether has data to send described parameter receiving element is received of described data transmission unit, if current free of data transmission, the then described TPC parameter of normal response in the predetermined subframe after current free of data sends beginning; In sending described predetermined subframe after the beginning, restore data do not respond described TPC parameter after the predetermined subframe after current free of data sends beginning.
14. power control apparatus according to claim 13 is characterized in that, also comprises:
The transmitted power determining unit is used in the described predetermined subframe after described data transmission unit restore data sends beginning, sends the transmission intercal that begins to restore data sends between the beginning according to free of data and determines required transmitted power.
15. power control apparatus according to claim 14 is characterized in that, described power control apparatus is specially terminal; Described transmitted power determining unit comprises:
First judgment sub-unit is used to judge that whether described transmission intercal is smaller or equal to threshold value;
First determines subelement, is used for the judged result according to described first judgment sub-unit, determines the transmitted power after described data transmission unit restore data sends, if described transmission intercal smaller or equal to first threshold value, is then determined required transmitted power P New=P Old+ Δ L, wherein P OldFor send the definite transmitted power of TPC parameter that response receives in the described predetermined subframe after beginning from free of data, Δ L is for obtaining P OldSubframe to P NewSubframe between path loss difference; If described transmission intercal greater than first threshold value, is then determined required transmitted power according to open Loop Power control.
16. power control apparatus according to claim 14 is characterized in that, described power control apparatus is specially the base station, and described transmitted power determining unit comprises:
Second judgment sub-unit is used to judge that whether described transmission intercal is smaller or equal to threshold value;
Second determines subelement, be used for judged result according to described first judgment sub-unit, determine the transmitted power after described data transmission unit restore data sends, if described transmission intercal is smaller or equal to second threshold value, determine that then required transmitted power be to send the definite transmitted power of TPC parameter that response receives in the described predetermined subframe after the beginning from free of data; If described transmission intercal is greater than second thresholding, and other all time slots all do not have data to send, and determine that then required transmitted power is an initial power; If described transmission intercal is greater than second thresholding, and the part time slot does not have data to send in other time slots, determines that then required transmitted power is P New=P Old+ sum (TPC)+Δ P, wherein P OldFor send the definite transmitted power of TPC parameter that response receives in the described predetermined subframe after beginning from free of data, sum (TPC) in other time slots from described free of data adding up of sending after the described predetermined subframe after the beginning that TPC that the time slot that data send is continuously arranged to continuous a plurality of subframes of current subframe adjusts and, Δ P is a power headroom.
CN200810226301A 2008-11-12 2008-11-12 Power control method and equipment Pending CN101741436A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102158941A (en) * 2011-04-20 2011-08-17 上海华为技术有限公司 Power control method, equipment and system
CN102595585A (en) * 2011-01-17 2012-07-18 英特尔公司 Method, apparatus and system for controlling power of wireless communication device
CN103428839A (en) * 2013-08-08 2013-12-04 大唐移动通信设备有限公司 Method and device for processing TPC (transmit power control) command words

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102595585A (en) * 2011-01-17 2012-07-18 英特尔公司 Method, apparatus and system for controlling power of wireless communication device
CN102595585B (en) * 2011-01-17 2015-08-19 英特尔公司 For controlling the method, apparatus and system of the power of radio communication device
CN102158941A (en) * 2011-04-20 2011-08-17 上海华为技术有限公司 Power control method, equipment and system
CN102158941B (en) * 2011-04-20 2014-07-09 上海华为技术有限公司 Power control method, equipment and system
CN103428839A (en) * 2013-08-08 2013-12-04 大唐移动通信设备有限公司 Method and device for processing TPC (transmit power control) command words
CN103428839B (en) * 2013-08-08 2017-03-01 大唐移动通信设备有限公司 A kind of processing method and processing device of TPC command word

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