CN101202574B - Mobile communication system user equipment in mobile communication system, control program thereof and transmission power control method in mobile communication system - Google Patents
Mobile communication system user equipment in mobile communication system, control program thereof and transmission power control method in mobile communication system Download PDFInfo
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Abstract
In a W-CDMA wireless system (1), when communication is performed by using a StandAlone-DCCH, adequate transmission power control is performed depending on change in a communication status. In a W-CDMA wireless system (1), a reception quality of a common channel is measured, and if a StandAlone-DCCH state has occurred, transmission power control corresponding to the common channel is performed in which a target SIR is determined depending on the reception quality of the common channel. Therefore, even in the StandAlone-DCCH state in which Blind transport format detection is used, it is possible to set the target SIR in accordance with a reception status of a user equipment (20), enabling the adequate transmission power control depending on the change in the communication status.
Description
Technical field
The present invention relates to a kind ofly provides the mobile communication system of communication service, the portable terminal of mobile communication system and the transmitted power control method of mobile communication system to portable terminal.
Background technology
In recent years, about polynary connected mode, adopted the mobile communication system of use W-CDMA (Wideband-CodeDivision Multiple Access, Wideband Code Division Multiple Access (WCDMA) inserts).
At mobile communication system (following suitably be called " the W-CDMA wireless system " that uses W-CDMA.) in, for communication quality is maintained predeterminated level, implemented through-put power control (transmission power control).
And, under various environment,,, carry out controlling the closed loop transmission power control of the dual ring structure that constitutes sometimes by interior ring control and outer shroud about through-put power control in order more stably to keep communication quality.
Fig. 3 is the schematic diagram of notion of the closed loop transmission power control of expression dual ring structure.
As shown in Figure 3, in the closed loop transmission power control of dual ring structure, in interior ring control, make the indication of transmitted power increase and decrease, so that the signal-to-interference ratio of the reception wireless signal of portable terminal (UE) (receiving SIR:Signal to Interference Ratio) is consistent with the reception SIR (target SIR) as target at opposed base station.And the target SIR in the ring control in the increase and decrease in outer shroud control is so that the reception block error rate of mobile terminal user data (receiving BLER:Block Error Rate) is consistent with the reception BLER (target BLER) as target.
At this, under according to independent private communication state (StandAlone-DCCH state) 3GPP 25.212 Annex-A regulation, employing blind transport format detection (Blind transport format detection), only set DCCH, DTCH is in the state of not setting.
Specifically, in portable terminal, under the IDLE state, pressing when sending button, in the connection procedure that between itself and base station, carries out, be in the state of having set up Radio Resource control (RRC:RadioResource Control).At this moment, separate physical channel is in the state of only having set DCCH and not set DTCH.And portable terminal carries out blind transport format detection to DCCH as object.
And, in follow-up connection procedure, carry out the foundation of radio bearer (RAB:Radio AccessBearer).
Like this, on the basis of DCCH, set DTCH, connection procedure finishes.
In this connection procedure, only set DCCH and the state of not setting DTCH is above-mentioned independent private communication state.
Under this independent private communication state, owing to do not send CRC (Cyclic RedundancyCheck), so can not calculate the BLER in the received signal.That is, in portable terminal, wait for to receive data all the time, be judged as data during for OK, and dock the receipts data and carry out process of decoding, so under the situation of not setting DTCH, be in the result's that can not judge CRC state in the result of CRC.As a result, the mensuration of BLER also can't be carried out.
Like this, generation can't make the situation that receives the BLER above-mentioned outer shroud control consistent with target BLER.
At this situation, definite method about the target SIR under the independent private communication state, once proposed the interval fixing method (with reference to patent documentation 1) of using predetermined specific target SIR value, and serve as the method (with reference to patent documentation 2) of the definite target SIR value in basis with the reception data error rate of the pilot signal in the separate physical channel (DPCCH) with control at StandAlone-DCCH.
Patent documentation 1: TOHKEMY 2003-318818 communique
Patent documentation 2: TOHKEMY 2004-274117 communique
But, when using predetermined fixed value as the target SIR of outer shroud control, because target SIR is constant, although, also do not require the power that certain value is above, cause taking place the situation of the transmitting-receiving failure of data so the quality of reception descends, on the contrary, although the quality of reception improves, still require too much transmitted power, cause taking place power consumption and increase the situation that other communication generations are disturbed that reaches.
And, when serving as the definite target SIR value in basis with the reception data error rate of the pilot signal in the separate physical channel with control, the signal that control is sent discretely with the pilot signal of separate physical channel (DPCCH), because amount of information is limited, so the target SIR that sets can not become suitable value sometimes.
At this, target SIR update method about the StandAlone-DCCH interval of outer shroud control, can consider when not having control information, also still send the signal that has only added CRC from the base station to portable terminal, and the method for the BLER of mensuration independent channel, although but owing to do not exist control information still to send signal yet, cause consuming useless power, and make the crc check number of times of the blind transport format detection under the StandAlone-DCCH situation when finishing, increase to 2 times by a crc check.
Like this, adopting under the independent private communication state under the situation of blind transport format detection, be difficult to carry out rational transmission power control according to communication conditions.
Summary of the invention
Problem of the present invention is to adopt under the situation of blind transport format detection under the independent private communication state, carrying out rational transmission power control according to communication conditions.
In order to solve above-mentioned problem, the invention provides a kind of mobile communication system, this mobile communication system comprises: the base station, but it has predetermined communication zone, and portable terminal, but it is when belonging to this communication zone, communicate with described base station, described base station and described portable terminal by a plurality of portable terminals the common common signal channel (for example CPICH of W-CDMA wireless system) that uses and the independent channel of independently setting at each portable terminal (for example DCH of W-CDMA wireless system) communicate, described mobile communication system is characterised in that, described portable terminal has: common signal channel quality of reception determination unit (for example common signal channel quality determination portion 22 among Fig. 1), and it measures the quality of reception that sends the channel of predetermined code in the described common signal channel continuously; Independent single user state detecting unit (for example carrying out the control part 24 among Fig. 1 of flow chart shown in Figure 2), it detects the independent private communication state that whether is in, this independent private communication state is as follows: be not set with the data transmission channel in the independent channel, and only receive and dispatch control information by the control channel (for example DCCH of W-CDMA wireless system) of independent channel; With transmission power control unit during the independent special use (for example carrying out the control part 24 among Fig. 1 of flow chart shown in Figure 2), it is detecting by described independent single user state detecting unit when not being described independent private communication state, carry out following transmission power control, promptly, the quality of reception according to the described data transmission channel in the described independent channel, make the transmitted power change of described base station, detecting by described independent single user state detecting unit when being described independent private communication state, (for example carry out the corresponding transmission power control of following common signal channel, the corresponding transmission power control of the common signal channel of Fig. 2), promptly, the quality of reception according to the common signal channel that is measured to by described common signal channel quality of reception determination unit, make the transmitted power change of described base station, described base station is according to the transmission power control of being undertaken by described portable terminal, and change is at the transmitted power of the independent channel of this portable terminal.
And, the invention provides a kind of portable terminal of mobile communication system, this mobile communication system comprises: the base station, but it has predetermined communication zone, and portable terminal, but it is when belonging to this communication zone, communicate with described base station, described base station and described portable terminal by a plurality of portable terminals the common common signal channel that uses and the independent channel of independently setting at each portable terminal communicate, described portable terminal carries out following transmission power control, promptly, the quality of reception according to the data transmission channel of independent channel, change the transmitted power of described base station, described portable terminal is characterised in that described portable terminal has: common signal channel quality of reception determination unit, and it measures the quality of reception that sends the channel of predetermined code in the described common signal channel continuously; Independent single user state detecting unit, whether its detection is in independent private communication state, and this independent private communication state is as follows: be not set with the data transmission channel in the independent channel, and only receive and dispatch control information by the control channel of independent channel; Transmission power control unit during the independent special use, it is detecting by described independent single user state detecting unit when not being described independent private communication state, carry out following transmission power control, promptly, the quality of reception according to the described data transmission channel in the described independent channel, make the transmitted power change of described base station, detecting by described independent single user state detecting unit when being described independent private communication state, carry out the corresponding transmission power control of following common signal channel, promptly, according to the quality of reception of the common signal channel that is measured to by described common signal channel quality of reception determination unit, make the transmitted power change of described base station.
And, the invention provides a kind of control program of portable terminal of mobile communication system, this mobile communication system comprises: the base station, but it has predetermined communication zone, and portable terminal, but it is when belonging to this communication zone, communicate with described base station, described base station and described portable terminal by a plurality of portable terminals the common common signal channel that uses and the independent channel of independently setting at each portable terminal communicate, described portable terminal carries out following transmission power control, promptly, the quality of reception according to the data transmission channel of independent channel, change the transmitted power of described base station, described control program is characterised in that described control program makes the following function of computer realization: common signal channel quality of reception measurement function, and it measures the quality of reception that sends the channel of predetermined code in the described common signal channel continuously; Independent single user state measuring ability, whether its detection is in independent private communication state, and this independent private communication state is as follows: be not set with the data transmission channel in the independent channel, and only receive and dispatch control information by the control channel of independent channel; With transmission power control function during the independent special use, it is when detecting described independent private communication state by described independent single user state measuring ability, carry out the corresponding transmission power control of following common signal channel, promptly, the quality of reception according to the common signal channel that is measured to by described common signal channel quality of reception measurement function changes the transmitted power of described base station.
And, the invention provides a kind of transmitted power control method of mobile communication system, this mobile communication system comprises: the base station, but it has predetermined communication zone; And portable terminal, but it is when belonging to this communication zone, communicate with described base station, described base station and described portable terminal by a plurality of portable terminals the common common signal channel that uses and the independent channel of independently setting at each portable terminal communicate, described portable terminal carries out following transmission power control, promptly, the quality of reception according to the data transmission channel of independent channel, change the transmitted power of described base station, described transmitted power control method is characterised in that described transmitted power control method comprises: the step that described portable terminal is carried out; With the transmitted power change step that described base station is carried out, according to the transmission power control of being undertaken by described portable terminal, change is at the transmitted power of the independent channel of this portable terminal, wherein, the step that described portable terminal is carried out comprises: common signal channel quality of reception determination step, measure the quality of reception that sends the channel of predetermined code in the described common signal channel continuously; Independent single user state detects step, detects whether be in independent private communication state, and this independent private communication state is as follows: be not set with the data transmission channel in the independent channel, and only receive and dispatch control information by the control channel of independent channel; With transmission power control step during the independent special use, detecting by described independent single user state detecting unit when not being described independent private communication state, carry out following transmission power control, promptly, the quality of reception according to the described data transmission channel in the described independent channel, make the transmitted power change of described base station, detect when being described independent private communication state detecting step by described independent single user state, carry out the corresponding transmission power control of following common signal channel, promptly, according to the quality of reception of the common signal channel that is measured to by described common signal channel quality of reception determination step, make the transmitted power change of described base station.
According to these inventions, measure the quality of reception of common signal channel, when being in independent private communication state, carry out the corresponding transmission power control of following common signal channel, that is, according to the quality of reception that sends the channel of predetermined code in the common signal channel continuously, the transmitted power of change base station.
Therefore,, also can carry out the transmission power control corresponding, can carry out rational transmission power control according to the variation of communication conditions with the reception situation of portable terminal adopting under the situation of blind transport format detection under the independent private communication state.
And, the invention is characterized in that described independent single user state detecting unit when not setting up radio bearer, detects described independent private communication state under the state of setting up Radio Resource control.
Therefore, can detect reliably from set up Radio Resource control (RRC:Radio ResourceControl) back to set up radio bearer (RAB:Radio Access Bearer) during, and as independent private communication state.
In addition, in portable terminal,, can judge according in connection procedure, whether having received the radio bearer set information (Radio Bearer Setup signal) that sends from the base station about whether having set up radio bearer.
And, the invention is characterized in that described common signal channel quality of reception determination unit is measured the quality of reception of Common Pilot Channel as described common signal channel.
This Common Pilot Channel is used for that all the time each portable terminal is play (broadcasted) and sends, and measures the time reference of base station in portable terminal, owing to do not carry out the code expansion, so in portable terminal, can capture easily.Therefore, be in independent private communication state and can not measure under the situation of the quality of reception of independent channel at independent channel, use can be all the time as the Common Pilot Channel of the benchmark of expression accepting state, rationally estimate the quality of reception of independent channel.
And, the invention is characterized in that described common signal channel quality of reception determination unit is measured and received the quality of reception of RSCP as described common signal channel.
Therefore, can use the parameter of common mensuration and judge the quality of reception of common signal channel at low cost easily.
And, the invention is characterized in that described common signal channel quality of reception determination unit is measured and received the quality of reception of Ec/N0 as described common signal channel.
Therefore, can use common parameters calculated and judge the quality of reception of common signal channel at low cost easily.
And, the invention is characterized in that described common signal channel quality of reception determination unit is measured and received the quality of reception of error rate as described common signal channel.
Therefore, can use the parameter of common mensuration and judge the quality of reception of common signal channel at low cost easily.
And, the invention is characterized in that described common signal channel quality of reception determination unit is measured and received the quality of reception of SIR as described common signal channel.
Therefore, in transmission power control, can utilize the quality of reception of normally used parameter decision common signal channel, to judge the quality of reception.
And, the invention is characterized in also have common signal channel quality of reception memory cell, measurement result when this common signal channel quality of reception cell stores detects described independent private communication state, described common signal channel quality of reception determination unit,
The transmission power control unit compares the measurement result of measuring later on by the measurement result and the described common signal channel quality of reception determination unit of common signal channel quality of reception cell stores during the described independent special use, carries out transmission power control according to its comparative result.
Therefore, can more reasonably embody the variation of communication conditions and carry out transmission power control.
According to the present invention, adopting under the situation of blind transport format detection under the independent private communication state, also can carry out the transmission power control corresponding with the reception situation of portable terminal, can carry out rational transmission power control according to the variation of communication conditions.
Description of drawings
Fig. 1 is the base station of the W-CDMA wireless system 1 that the present invention relates to of expression and the sketch map of portable terminal.
Fig. 2 is the flow chart that transmission power control that StandAlone-DCCH state that expression control part 24 is carried out is used is handled.
Fig. 3 is the schematic diagram of notion of the closed loop transmission power control of expression dual ring structure.
Symbol description
1 W-CDMA wireless system; 10 base stations; 20 portable terminals; 21 receiving and transmitting parts; 22 common signal channel quality determination portions; 23 BER determination parts; 24 control parts.
Embodiment
Below, be suitable for the execution mode of W-CDMA wireless system of the present invention with reference to description of drawings.
Fig. 1 is the base station of the W-CDMA wireless system 1 that the present invention relates to of expression and the sketch map of portable terminal.
In Fig. 1, W-CDMA wireless system 1 comprises base station 10 and portable terminal 20.
Specifically, but communicating by letter based on W-CDMA set up with the portable terminal 20 of the communication zone that is positioned at base station 10 in base station 10, by comprising the physical channel of Common Pilot Channel (CPICH), Common Control Physical Channel (CCPCH) and separate physical channel (DPCH), communicate with portable terminal 20.
Wherein, public mobile channel is the channel of the scrambler (PN code) that sends base station 10 continuously, and this channel is play transmission to all portable terminals 20.
Common Control Physical Channel is the channel that sends the user data of the control information of announcement information, paging signal etc. or low rate.
Separate physical channel is that each portable terminal 20 is respectively distributed one and receive and dispatch the channel of user data.And separate physical channel is assigned with the DCH (Dedicated Channel) in the transmission channel, and DCH is assigned with the DCCH (Dedicated Control Channel) and the DTCH (Dedicated Traffic Channel) of logic channel in addition.
And base station 10 is received and dispatched user data by DTCH between itself and the portable terminal 20, by DCCH transmitting-receiving control information.
21 pairs of wireless signals that receive by antenna of receiving and transmitting part carry out the decomposition based on frequency inverted and demodulation process and the data of W-CDMA, its result is exported to control part 24, and the signal from control part 24 input is carried out data multiplexing and modulation treatment and frequency inverted based on W-CDMA, by this result of antenna transmission.
Common signal channel quality determination portion 22 measures the quality of reception of the common signal channel (Common Pilot Channel) in the communicating by letter of carrying out between base stations 10 and the portable terminal 20, and measurement result is exported to control part 24.Common Pilot Channel is used for measuring the time reference of base station 10 at portable terminal 20, owing to do not carry out the code expansion, so can in portable terminal 20, capture easily.
At this, about the quality of reception that common signal channel quality determination portion 22 measures, for example can be RSCP (Received Signal Code Power), receive Ec/N0 (desired signal is to noise power ratio), receive error rate (BER) or SIR etc.
The BER that BER determination part 23 is measured separate physical channel exports to control part 24 to measurement result.
The whole portable terminal 20 of control part 24 controls, based on BER measurement result by 23 inputs of BER determination part, measure the reception SIR of separate physical channel, use (hereinafter referred to as " normal transmission power control " with this measurement result and as the transmission power control under the non-StandAlone-DCCH state.) and preset threshold compares.And, when control part 24 surpasses threshold value at the reception SIR that is measured, send the control information (TPC bit) that the transmitted power that makes base station 10 only reduces the value that sets.And, when control part 24 is lower than threshold value at the reception SIR that is measured, the control information that transmission makes the transmitted power of base station 10 only improve the value that sets.
In addition, control part 24 detect whether be in the DTCH that is not set with separate physical channel, and only transmitting-receiving based on the StandAlone-DCCH state (independent private communication state) of the control information of DCCH.At this moment, control part 24 under the state of setting up Radio Resource control (RRC), when not setting up radio bearer (RAB), detects independent private communication state in the connection procedure of base station 10 and portable terminal 20.About whether having set up the situation of radio bearer, can judge according in connection procedure, whether having received from the base station the 10 radio bearer set informations (Radio Bearer Setup signal) that send to portable terminal 20.
In addition, when being in the StandAlone-DCCH state, carry out blind transport format detection sometimes according to 3GPP 25.212Annex-A regulation.
And, control part 24 is carried out the transmission power control that the StandAlone-DCCH state narrated later uses and is handled, the quality of reception of common signal channel that will be by 22 inputs of common signal channel quality determination portion, with as the transmission power control of the quality of reception of having utilized common signal channel with and preset threshold (hereinafter referred to as " common signal channel threshold value ".) compare that (the following transmission power control that the StandAlone-DCCH state is used is handled and called " the corresponding transmission power control of common signal channel ".)。And, when control part 24 is used threshold value in the quality of reception of common signal channel above common signal channel, send the control information (TPC bit) that the transmitted power that makes base station 10 only reduces the value that sets.And control part 24 sends the control information that the transmitted power that makes base station 10 only improves the value that sets when the quality of reception of common signal channel is lower than common signal channel and uses threshold value.
In addition, control part 24 is not when being the StandAlone-DCCH state, the control information that sends based on normal transmission power control to base station 10, when being the StandAlone-DCCH state, the control information that sends based on the corresponding transmission power control of common signal channel to base station 10.
Below, the action of W-CDMA wireless system 1 is described.
Fig. 2 is the flow chart that the corresponding transmission power control of common signal channel of expression control part 24 execution is handled.
The corresponding transmission power control of common signal channel is handled and is begun to carry out corresponding to control part 24 detects the situation of StandAlone-DCCH state.
After the corresponding transmission power control of common signal channel was handled beginning, control part 24 judged whether need to change target SIR, and the quality of reception of promptly judging common signal channel is with respect to the height (step S1) of common signal channel with threshold value.
At step S1, (when for example the quality of reception of common signal channel uses threshold value consistent with common signal channel) do not keep current target SIR (step S2) when judgement does not need to change target SIR.
On the other hand, at step S1, be judged to be when needing the change target SIR (for example the quality of reception of common signal channel is greater than or less than common signal channel when using threshold value), control part 24 is according to the relation between the quality of reception of common signal channel usefulness threshold value and common signal channel, upgrade current target SIR, improve or reduce target SIR (step S3).
After step S2 and step S3, control part 24 carries out the judgement (step S4) whether the StandAlone-DCCH state is continuing, be judged to be the StandAlone-DCCH state when lasting, change step S1 over to, being judged to be the StandAlone-DCCH state when continuing, finish the corresponding transmission power control of common signal channel and handle.
According to this action, when not being the StandAlone-DCCH state, carry out normal transmission power control and handle (transmission power control based on the quality of reception of separate physical channel is handled), when being the StandAlone-DCCH state, carrying out the corresponding transmission power control of common signal channel and handle (transmission power control based on the quality of reception of common signal channel is handled).
As mentioned above, the W-CDMA wireless system 1 that present embodiment relates to is measured the quality of reception of common signal channel, when being in the StandAlone-DCCH state, carry out determining the corresponding transmission power control processing of common signal channel of target SIR according to the quality of reception of common signal channel.
Therefore,, also can set the target SIR corresponding, can carry out rational transmission power control according to the variation of communication conditions with the reception situation of portable terminal 20 having adopted under the StandAlone-DCCH state of blind transport format detection.
And, by as present embodiment, using Common Pilot Channel, because Common Pilot Channel is not carried out the code expansion, thus can in portable terminal 20, capture easily, can be as the reasonable benchmark that is used to judge the quality of reception.
(application examples 1)
In the above-described embodiment, the quality of reception of measuring common signal channel has been described, and determine the situation of target SIR according to each quality of reception regularly, but, by common signal channel quality of reception storage part is set at control part 24, be used for storing the quality of reception of the common signal channel that when being in the StandAlone-DCCH state, (is in the moment of the state of not setting DTCH), control part 24 can relatively pass through the quality of reception of the common signal channel of common signal channel quality determination portion 22 inputs, with the quality of reception that is stored in the common signal channel quality of reception storage part, and determine target SIR according to the size of its difference.
Thus, can more reasonably embody the variation of communication conditions, and carry out transmission power control.
(application examples 2)
As the method for in control part 24, upgrading target SIR according to the quality of reception of common signal channel, reception RSCP, the SF of Ec/N0, path loss and independent channel (DCH) by considering CPICH, and the reception SIR of estimation DCCH, can judge and target SIR between departure degree, depart from change target SIR when big, hour keeping target SIR departing from.As the method for the reception SIR that estimates DCCH, can use method that logic converts, according to experiment value or empirical value estimation approach.
Specifically, can use following illustrative method as the method for the quality of reception of judging common signal channel.
The current Ec/N0 of independent channel with respect to the Ec/N0 of T before second be+1dB is during to+2dB, target SIR enforcement-1dB is handled.
The current Ec/N0 of independent channel with respect to the Ec/N0 of T before second be-1dB is during to-2dB, target SIR enforcement+1dB is handled.
The current Ec/N0 of independent channel with respect to the Ec/N0 of T before second be-2dB is during to-3dB, to target SIR enforcement+2dB.
The current Ec/N0 of independent channel with respect to the Ec/N0 of T before second be-1dB is during to+1dB, if the Ec/N0 of CPICH be-4dB arrives-8dB, then keeps target SIR.
And, can also use following method.
Current Ec/N0 at independent channel is-2dB is during to 0dB, and target SIR enforcement-1dB handled.
Current Ec/N0 at independent channel is-8dB is during to-10dB, and target SIR enforcement+1dB handled.
Current Ec/N0 at independent channel is-10dB is during to-12dB, and target SIR enforcement+2dB handled.
In addition, can also use following method.
The current Ec/N0 of independent channel with respect to the Ec/N0 of T before second be+1dB is to+2dB, and current path loss with respect to the path loss of T before second be-1dB arrives-during 3dB, target SIR enforcement-1dB is handled.
The current Ec/N0 of independent channel with respect to the Ec/N0 of T before second be-1dB is to-2dB, and current path loss with respect to the path loss of T before second be+1dB arrives+during 3dB, target SIR enforcement+1dB is handled.
The current Ec/N0 of independent channel with respect to the Ec/N0 of T before second be-2dB is to-3dB, and current path loss with respect to the path loss of T before second be+3dB arrives+during 6dB, target SIR enforcement+2dB is handled.
Claims (10)
1. mobile communication system, this mobile communication system comprises: the base station, but it has predetermined communication zone; And portable terminal, but its when belonging to this communication zone, communicate with described base station, described base station and described portable terminal by a plurality of portable terminals the common common signal channel that uses and the independent channel of independently setting at each portable terminal communicate,
Described mobile communication system is characterised in that,
Described portable terminal has:
Common signal channel quality of reception determination unit, it measures the quality of reception that sends the channel of predetermined code in the described common signal channel continuously;
Independent single user state detecting unit, whether its detection is in independent private communication state, and this independent private communication state is as follows: be not set with the data transmission channel in the independent channel, and only receive and dispatch control information by the control channel of independent channel; With
Transmission power control unit during the independent special use, it is detecting by described independent single user state detecting unit when not being described independent private communication state, carry out following transmission power control, promptly, the quality of reception according to the described data transmission channel in the described independent channel, make the transmitted power change of described base station, detecting by described independent single user state detecting unit when being described independent private communication state, carry out the corresponding transmission power control of following common signal channel, promptly, according to the quality of reception of the common signal channel that is measured to by described common signal channel quality of reception determination unit, make the transmitted power change of described base station
Described base station is according to the transmission power control of being undertaken by described portable terminal, and change is at the transmitted power of the independent channel of this portable terminal.
2. mobile communication system according to claim 1 is characterized in that, described independent single user state detecting unit when not setting up radio bearer, detects described independent private communication state under the state of setting up Radio Resource control.
3. mobile communication system according to claim 1 and 2 is characterized in that, described common signal channel quality of reception determination unit is measured the quality of reception as the Common Pilot Channel of described common signal channel.
4. mobile communication system according to claim 1 is characterized in that, described common signal channel quality of reception determination unit is measured and received the quality of reception of received signal code power as described common signal channel.
5. mobile communication system according to claim 1 is characterized in that, described common signal channel quality of reception determination unit is measured and received desired signal to the quality of reception of noise power ratio as described common signal channel.
6. mobile communication system according to claim 1 is characterized in that, described common signal channel quality of reception determination unit is measured and received the quality of reception of error rate as described common signal channel.
7. mobile communication system according to claim 1 is characterized in that, described common signal channel quality of reception determination unit is measured the quality of reception of received signal-to-interference ratio as described common signal channel.
8. mobile communication system according to claim 1, it is characterized in that, this mobile communication system also has common signal channel quality of reception memory cell, when this common signal channel quality of reception cell stores detects described independent private communication state, the resulting measurement result of described common signal channel quality of reception determination unit
The transmission power control unit compares the measurement result of measuring later on by the measurement result and the described common signal channel quality of reception determination unit of common signal channel quality of reception cell stores during the described independent special use, carries out transmission power control according to its comparative result.
9. the portable terminal of a mobile communication system, this mobile communication system comprises: the base station, but it has predetermined communication zone; And portable terminal, but its when belonging to this communication zone, communicate with described base station, described base station and described portable terminal by a plurality of portable terminals the common common signal channel that uses and the independent channel of independently setting at each portable terminal communicate,
Described portable terminal is characterised in that,
Described portable terminal has:
Common signal channel quality of reception determination unit, it measures the quality of reception that sends the channel of predetermined code in the described common signal channel continuously;
Independent single user state detecting unit, whether its detection is in independent private communication state, and this independent private communication state is as follows: be not set with the data transmission channel in the independent channel, and only receive and dispatch control information by the control channel of independent channel; With
Transmission power control unit during the independent special use, it is detecting by described independent single user state detecting unit when not being described independent private communication state, carry out following transmission power control, promptly, the quality of reception according to the described data transmission channel in the described independent channel, make the transmitted power change of described base station, detecting by described independent single user state detecting unit when being described independent private communication state, carry out the corresponding transmission power control of following common signal channel, promptly, according to the quality of reception of the common signal channel that is measured to by described common signal channel quality of reception determination unit, make the transmitted power change of described base station.
10. the transmitted power control method of a mobile communication system, this mobile communication system comprises: the base station, but it has predetermined communication zone; And portable terminal, but its when belonging to this communication zone, communicate with described base station, described base station and described portable terminal by a plurality of portable terminals the common common signal channel that uses and the independent channel of independently setting at each portable terminal communicate,
Described transmitted power control method is characterised in that,
Described transmitted power control method comprises: the step that described portable terminal is carried out; Transmitted power change step with described base station is carried out according to the transmission power control of being undertaken by described portable terminal, changes the transmitted power at the independent channel of this portable terminal, wherein,
The step that described portable terminal is carried out comprises:
Common signal channel quality of reception determination step is measured the quality of reception that sends the channel of predetermined code in the described common signal channel continuously;
Independent single user state detects step, detects whether be in independent private communication state, and this independent private communication state is as follows: be not set with the data transmission channel in the independent channel, and only receive and dispatch control information by the control channel of independent channel; With
Transmission power control step during the independent special use, detecting by described independent single user state detecting unit when not being described independent private communication state, carry out following transmission power control, promptly, the quality of reception according to the described data transmission channel in the described independent channel, make the transmitted power change of described base station, detect when being described independent private communication state detecting step by described independent single user state, carry out the corresponding transmission power control of following common signal channel, promptly, according to the quality of reception of the common signal channel that is measured to by described common signal channel quality of reception determination step, make the transmitted power change of described base station.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006333352 | 2006-12-11 | ||
| JP2006333352 | 2006-12-11 | ||
| JP2006-333352 | 2006-12-11 | ||
| JP2007304652A JP4981636B2 (en) | 2006-12-11 | 2007-11-26 | Mobile communication system, mobile terminal in mobile communication system, control program thereof, and transmission power control method in mobile communication system |
| JP2007-304652 | 2007-11-26 | ||
| JP2007304652 | 2007-11-26 |
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| Publication Number | Publication Date |
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| CN101202574A CN101202574A (en) | 2008-06-18 |
| CN101202574B true CN101202574B (en) | 2011-10-26 |
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| CN200710186530XA Expired - Fee Related CN101202574B (en) | 2006-12-11 | 2007-12-07 | Mobile communication system user equipment in mobile communication system, control program thereof and transmission power control method in mobile communication system |
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| CN105743606A (en) * | 2014-12-09 | 2016-07-06 | 深圳市中兴微电子技术有限公司 | Downlink reference signal adjustment method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0709973A1 (en) * | 1994-10-24 | 1996-05-01 | Ntt Mobile Communications Network Inc. | Transmission power control scheme for mobile communication system |
| EP0853393A1 (en) * | 1996-06-27 | 1998-07-15 | Ntt Mobile Communications Network Inc. | Transmitted power controller |
| CN1245389A (en) * | 1998-07-30 | 2000-02-23 | 三星电子株式会社 | Method for controlling forward power in honeycomb mobile communication system |
| CN1520647A (en) * | 1999-01-28 | 2004-08-11 | �����ɷ� | Method and appts. for controlling transmission power in CDMA communication system |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4619192B2 (en) * | 2005-05-10 | 2011-01-26 | 株式会社エヌ・ティ・ティ・ドコモ | Transmission power control method and apparatus |
-
2007
- 2007-11-26 JP JP2007304652A patent/JP4981636B2/en not_active Expired - Fee Related
- 2007-12-07 CN CN200710186530XA patent/CN101202574B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0709973A1 (en) * | 1994-10-24 | 1996-05-01 | Ntt Mobile Communications Network Inc. | Transmission power control scheme for mobile communication system |
| EP0853393A1 (en) * | 1996-06-27 | 1998-07-15 | Ntt Mobile Communications Network Inc. | Transmitted power controller |
| CN1245389A (en) * | 1998-07-30 | 2000-02-23 | 三星电子株式会社 | Method for controlling forward power in honeycomb mobile communication system |
| CN1520647A (en) * | 1999-01-28 | 2004-08-11 | �����ɷ� | Method and appts. for controlling transmission power in CDMA communication system |
Also Published As
| Publication number | Publication date |
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| JP4981636B2 (en) | 2012-07-25 |
| CN101202574A (en) | 2008-06-18 |
| JP2008172764A (en) | 2008-07-24 |
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