CN101496434A - Wireless communication method, base station control apparatus and wireless communication terminal - Google Patents

Wireless communication method, base station control apparatus and wireless communication terminal Download PDF

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Publication number
CN101496434A
CN101496434A CN200780028454.8A CN200780028454A CN101496434A CN 101496434 A CN101496434 A CN 101496434A CN 200780028454 A CN200780028454 A CN 200780028454A CN 101496434 A CN101496434 A CN 101496434A
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China
Prior art keywords
carrier wave
carrier
transmitted power
power difference
base station
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CN200780028454.8A
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CN101496434B (en
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柏濑荐
守田空悟
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Kyocera Corp
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Kyocera Corp
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Priority claimed from JP2006207239A external-priority patent/JP4732265B2/en
Application filed by Kyocera Corp filed Critical Kyocera Corp
Priority claimed from PCT/JP2007/064810 external-priority patent/WO2008013283A1/en
Publication of CN101496434A publication Critical patent/CN101496434A/en
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Abstract

A wireless communication method provided includes a step of calculating a transmission power difference between the transmission power value of a first carrier and that of a second carrier; a step of judging whether the transmission power difference exceeds a threshold value set based on the allowable maximum transmission power difference between the first carrier and the second carrier; and a step of transmitting a handoff instruction of either the first carrier or the second carrier which has a higher transmission power value, in the case where the transmission power difference exceeds the threshold value set based on the maximum transmission power difference.

Description

Wireless communications method, base station controller and wireless communication terminal
Technical field
The present invention relates in reverse link to use the multicarrier of a plurality of carrier waves wireless communications method, be used to control the use multicarrier from wireless communication terminal to the wireless base station reverse link communication base station controller and use multicarrier to come the wireless communication terminal of executive communication.
Background technology
In recent years, because the diversification and the development of application to be processed (as moving image and recreation) are starved of the data transfer rate of quickening in the mobile communication system.Under such background, for example third generation partner program 2 (3GPP2) has defined the scheme that realizes high-speed data transfer at a plurality of carrier waves (so-called multicarrier) of upper strata binding by using.
Under the situation of multicarrier, wireless communication terminal (accessing terminal) is general to be adopted by using the single wireless communication network to send the configuration of a plurality of carrier waves, owing to reduce size, has therefore reduced manufacturing cost etc.Therefore, in order to reduce with the interference between the adjacent carrier adjacent each other of preset frequency interval (1.25MHz at interval), transmitted power difference between the regulation adjacent carrier should be within predetermined threshold (MaxRLTxPwrDiff, for example 15dB) (for example non-patent literature 1).
Non-patent literature 1: " cdma2000 High Rate Packet Data Air Interface3GPP2 C.S0024-B Version 1.0 ", 3GPP2, June 2006.
Summary of the invention
As mentioned above, the 3GPP2 regulation should be controlled at the transmitted power difference between the adjacent carrier within the predetermined threshold (MaxRLTxPwrDiff).Yet in some cases, under some communication conditions between wireless communication terminal and wireless base station (Access Network), the transmitted power difference can't maintain within this predetermined threshold.
For example, when wireless communication terminal moves away from first wireless base station that current use first carrier comes executive communication, move simultaneously and come second wireless base station of executive communication to current use second carrier wave, and this second carrier wave is at interval adjacent with first carrier with preset frequency, and the transmitted power that wireless communication terminal need increase first carrier is kept and the communicating by letter of first wireless base station that uses first carrier.In addition, along with close second wireless base station of wireless communication terminal, this wireless communication terminal reduces the transmitted power of second carrier wave.
In this manner, in some cases, wireless communication terminal may not maintain the transmitted power difference predetermined threshold and continue communicating by letter of current that carrying out and first wireless base station and second wireless base station.
Therefore, made the present invention based on such situation, the purpose of this invention is to provide a kind of wireless communications method, base station controller and wireless communication terminal, can keep multi-carrier communication, prevent simultaneously with the interference between the preset frequency adjacent carrier adjacent each other at interval.
An aspect of of the present present invention is summarised as a kind of wireless communications method that uses multicarrier at the reverse link from wireless communication terminal to the wireless base station, described multicarrier uses the first carrier and second carrier wave at least, described second carrier wave is adjacent with described first carrier at interval with preset frequency, said method comprising the steps of: obtain the transmission power value of described first carrier and the transmission power value of described second carrier wave from the wireless base station; The transmitted power of calculating between described first carrier and described second carrier wave is poor; Determine whether described transmitted power difference surpasses the threshold value that is provided with based on the maximum transmit power difference that allows between described first carrier and described second carrier wave; And when described transmitted power difference surpassed the threshold value that is provided with based on described maximum transmit power difference, a carrier wave that has higher transmission power value in by described first carrier and described second carrier wave was connected to the handover indication of the wireless base station transmission of wireless communication terminal at a carrier wave that has higher transmission power value in described first carrier and described second carrier wave.
According to this aspect, if described transmitted power difference surpasses the threshold value that is provided with based on described maximum transmit power difference, then send at the handover of a carrier wave and indicate, the transmitted power difference can be maintained within the described maximum transmit power difference with higher transmission power value to the wireless base station that is connected to wireless communication terminal by a carrier wave with higher transmission power value.Therefore, can keep multi-carrier communication, control simultaneously with the interference between the preset frequency adjacent carrier adjacent each other at interval.
Another aspect of the present invention is summarised as, of the present invention above-mentioned aspect in, in the step of calculating the transmitted power difference, it is poor to calculate transmitted power with predetermined period, and described wireless communications method is further comprising the steps of: determine based on the transmitted power difference of calculating with predetermined period whether the transmitted power difference increases; Wherein, when definite transmitted power difference is increasing, in the step that sends the handover indication, a carrier wave that has higher transmitted power in by described first carrier and described second carrier wave is connected to the handover indication of the wireless base station transmission of wireless communication terminal at a carrier wave that has higher transmitted power in described first carrier and described second carrier wave.
An aspect of of the present present invention is summarised as a kind of wireless communications method that uses multicarrier at the reverse link from wireless communication terminal to the wireless base station, described multicarrier uses the first carrier and second carrier wave at least, described second carrier wave is adjacent with described first carrier at interval with preset frequency, said method comprising the steps of: obtain the transmission power value of described first carrier and the transmission power value of described second carrier wave from the wireless base station; The transmitted power of calculating between described first carrier and described second carrier wave is poor; Determine whether described transmitted power difference surpasses the threshold value that is provided with based on the maximum transmit power difference that allows between described first carrier and described second carrier wave; And when described transmitted power difference surpassed the threshold value that is provided with based on described maximum transmit power difference, a carrier wave that has low transmission power value in by described first carrier and described second carrier wave was connected to the handover indication of the wireless base station transmission of wireless communication terminal at a carrier wave that has low transmission power value in described first carrier and described second carrier wave.
According to this aspect, if described transmitted power difference surpasses the threshold value that is provided with based on described maximum transmit power difference, then send at handover indication, the transmitted power difference can be maintained within the described maximum transmit power difference with carrier wave that hangs down transmission power value to the wireless base station that is connected to wireless communication terminal by a carrier wave with low transmission power value.Therefore, can keep multi-carrier communication, control simultaneously with the interference between the preset frequency adjacent carrier adjacent each other at interval.
Another aspect of the present invention is summarised as, of the present invention above-mentioned aspect in, in the step of calculating the transmitted power difference, it is poor to calculate transmitted power with predetermined period, and described method is further comprising the steps of: determine based on the transmitted power difference of calculating with predetermined period whether the transmitted power difference increases; Wherein, when definite transmitted power difference is increasing, in the step that sends the handover indication, a carrier wave that has low transmission power value in by described first carrier and described second carrier wave is connected to the handover indication of the wireless base station transmission of wireless communication terminal at a carrier wave that has low transmission power value in described first carrier and described second carrier wave.
An aspect of of the present present invention is summarised as a kind of base station controller, be used to be controlled at the communication of reverse link use multicarrier from wireless communication terminal to the wireless base station, described multicarrier uses the first carrier and second carrier wave at least, described second carrier wave is adjacent with described first carrier at interval with preset frequency, described controller comprises: transmission power value acquiring unit (power information receiver 210) is configured to obtain from the wireless base station transmission power value of described first carrier and the transmission power value of described second carrier wave; Transmitted power difference calculator (transmitted power difference calculator 220), it is poor to be configured to the transmitted power that the transmission power value of the transmission power value of the described first carrier that obtained based on described transmission power value acquiring unit and described second carrier wave calculates between described first carrier and described second carrier wave; Transmitted power difference determining unit (transmitted power difference calculator 220) is configured to determine whether the transmitted power difference that described transmitted power difference calculator calculates surpasses the threshold value that is provided with based on the maximum transmit power difference that allows between described first carrier and described second carrier wave; And handover indication transmitter (handover indication transmitter 230), be configured to when described transmitted power difference determining unit determines that described transmitted power difference surpasses the threshold value that is provided with based on described maximum transmit power difference, a carrier wave that has higher transmission power value in by described first carrier and described second carrier wave is connected to the handover indication of the wireless base station transmission of wireless communication terminal at a carrier wave that has higher transmission power value in described first carrier and described second carrier wave.
Another aspect of the present invention is summarised as, of the present invention above-mentioned aspect in, it is poor that described transmitted power difference calculator calculates transmitted power with predetermined period, described base station controller also comprises: difference power determining unit (transmitted power difference determining unit 240) is configured to determine based on the transmitted power difference that described transmitted power difference calculator calculates with predetermined period whether the transmitted power difference increases; Wherein, when definite transmitted power difference was increasing, described handover indication transmitter has higher transmission power value in by described first carrier and described second carrier wave a carrier wave was connected to the handover indication of the wireless base station transmission of wireless communication terminal at a carrier wave that has higher transmission power value in described first carrier and described second carrier wave.
An aspect of of the present present invention is summarised as a kind of base station controller, be used to be controlled at the communication of reverse link use multicarrier from wireless communication terminal to the wireless base station, described multicarrier uses the first carrier and second carrier wave at least, described second carrier wave is adjacent with described first carrier at interval with preset frequency, described controller comprises: transmission power value acquiring unit (power information receiver 210) is configured to obtain from the wireless base station transmission power value of described first carrier and the transmission power value of described second carrier wave; Transmitted power difference calculator (transmitted power difference calculator 220), it is poor to be configured to the transmitted power that the transmission power value of the transmission power value of the described first carrier that obtained based on described transmission power value acquiring unit and described second carrier wave calculates between described first carrier and described second carrier wave; Transmitted power difference determining unit (transmitted power difference calculator 220) is configured to determine whether the transmitted power difference that described transmitted power difference calculator calculates surpasses the threshold value that is provided with based on the maximum transmit power difference that allows between described first carrier and described second carrier wave; And handover indication transmitter (handover indication transmitter 230), be configured to when described transmitted power difference determining unit determines that described transmitted power difference surpasses the threshold value that is provided with based on described maximum transmit power difference, a carrier wave that has low transmission power value in by described first carrier and described second carrier wave is connected to the handover indication of the wireless base station transmission of wireless communication terminal at a carrier wave that has low transmission power value in described first carrier and described second carrier wave.
Another aspect of the present invention is summarised as, of the present invention above-mentioned aspect in, it is poor that described transmitted power difference calculator calculates transmitted power with predetermined period, described base station controller also comprises: difference power determining unit (transmitted power difference determining unit 240) is configured to determine based on the transmitted power difference that described transmitted power difference calculator calculates with predetermined period whether the transmitted power difference increases; Wherein, when definite transmitted power difference was increasing, the wireless base station that described handover indication transmitter has low transmission power value in by described first carrier and described second carrier wave a carrier wave is connected to wireless communication terminal sent at the handover indication that has in described first carrier and described second carrier wave than a carrier wave of low transmission power value.
An aspect of of the present present invention is summarised as a kind of wireless communications method that uses multicarrier at reverse link, described multicarrier uses the first carrier and second carrier wave at least, described second carrier wave is adjacent with described first carrier at interval with preset frequency, and said method comprising the steps of: the transmitted power of calculating between described first carrier and described second carrier wave is poor; Determine whether described transmitted power difference surpasses the threshold value that is provided with based on the maximum transmit power difference that allows between described first carrier and described second carrier wave; And when described transmitted power difference surpassed the threshold value that is provided with based on described maximum transmit power difference, a carrier wave that has higher transmitted power in by described first carrier and described second carrier wave was connected to the wireless base station transmission of wireless communication terminal at the hand-off request that has a carrier wave of higher transmitted power in described first carrier and described second carrier wave.
According to this aspect, if described transmitted power difference surpasses the threshold value that is provided with based on described maximum transmit power difference, a carrier wave that then has higher transmitted power in by described first carrier and described second carrier wave is connected to the wireless base station transmission of wireless communication terminal at the hand-off request that has a carrier wave of higher transmitted power in described first carrier and described second carrier wave.Therefore, can keep multi-carrier communication, control simultaneously with the interference between the preset frequency adjacent carrier adjacent each other at interval.
Another aspect of the present invention is summarised as, of the present invention above-mentioned aspect in, in the step of calculating the transmitted power difference, it is poor to calculate transmitted power with predetermined period, and described method is further comprising the steps of: determine based on the transmitted power difference of calculating with predetermined period whether the transmitted power difference increases; Wherein, when definite transmitted power difference is increasing, in the step that sends hand-off request, a carrier wave that has higher transmitted power in by described first carrier and described second carrier wave is connected to the wireless base station transmission of wireless communication terminal at the hand-off request that has a carrier wave of higher transmitted power in described first carrier and described second carrier wave.
An aspect of of the present present invention is summarised as a kind of wireless communications method that uses multicarrier at reverse link, described multicarrier uses the first carrier and second carrier wave at least, described second carrier wave is adjacent with described first carrier at interval with preset frequency, and said method comprising the steps of: the transmitted power of calculating between described first carrier and described second carrier wave is poor; Determine whether described transmitted power difference surpasses the threshold value that is provided with based on the maximum transmit power difference that allows between described first carrier and described second carrier wave; And when described transmitted power difference surpassed the threshold value that is provided with based on described maximum transmit power difference, a carrier wave that has low transmitted power in by described first carrier and described second carrier wave was connected to the hand-off request of the wireless base station transmission of wireless communication terminal at a carrier wave that has low transmitted power in described first carrier and described second carrier wave.
According to this aspect, if described transmitted power difference surpasses the threshold value that is provided with based on described maximum transmit power difference, a carrier wave that then has low transmission power value in by described first carrier and described second carrier wave is connected to the hand-off request of the wireless base station transmission of wireless communication terminal at a carrier wave that has low transmission power value in described first carrier and described second carrier wave.Therefore, can keep multi-carrier communication, control simultaneously with the interference between the preset frequency adjacent carrier adjacent each other at interval.
Another aspect of the present invention is summarised as, of the present invention above-mentioned aspect in, in the step of calculating the transmitted power difference, it is poor to calculate transmitted power with predetermined period, and described wireless communications method is further comprising the steps of: determine based on the transmitted power difference of calculating with predetermined period whether the transmitted power difference increases; Wherein, when definite transmitted power difference is increasing, in the step that sends hand-off request, a carrier wave that has low transmitted power in by described first carrier and described second carrier wave is connected to the hand-off request of the wireless base station transmission of wireless communication terminal at a carrier wave that has low transmitted power in described first carrier and described second carrier wave.
An aspect of of the present present invention is summarised as a kind of wireless communication terminal that uses multicarrier to come executive communication, described multicarrier uses the first carrier and second carrier wave at least, described second carrier wave is adjacent with described first carrier at interval with preset frequency, described communication terminal comprises: transmitted power difference calculator (transmitted power difference calculator 22), and it is poor to be configured to the transmitted power calculated between described first carrier and described second carrier wave; Transmitted power difference determining unit (transmitted power difference calculator 22) is configured to determine whether the described transmitted power difference that described transmitted power difference calculator calculates surpasses the threshold value that is provided with based on the maximum transmit power difference that allows between described first carrier and described second carrier wave; And hand-off request transmitter (communication controler 23), be configured to when described transmitted power difference determining unit determines that described transmitted power difference surpasses the threshold value that is provided with based on described maximum transmit power difference, a carrier wave that has higher transmitted power in by described first carrier and described second carrier wave is connected to the wireless base station transmission of wireless communication terminal at the hand-off request that has a carrier wave of higher transmitted power in described first carrier and described second carrier wave.
Another aspect of the present invention is summarised as, of the present invention above-mentioned aspect in, it is poor that described transmitted power difference calculator calculates transmitted power with predetermined period, described wireless communication terminal also comprises: difference power determining unit (transmitted power difference determining unit 25) is configured to determine based on the transmitted power difference that described transmitted power difference calculator calculates with predetermined period whether the transmitted power difference increases; Wherein, when definite transmitted power difference was increasing, described hand-off request transmitter has higher transmitted power in by described first carrier and described second carrier wave a carrier wave was connected to the wireless base station transmission of wireless communication terminal at the hand-off request that has a carrier wave of higher transmitted power in described first carrier and described second carrier wave.
An aspect of of the present present invention is summarised as a kind of wireless communication terminal that uses multicarrier to come executive communication, described multicarrier uses the first carrier and second carrier wave at least, described second carrier wave is adjacent with described first carrier at interval with preset frequency, described communication terminal comprises: transmitted power difference calculator (transmitted power difference calculator 22), and it is poor to be configured to the transmitted power calculated between described first carrier and described second carrier wave; Transmitted power difference determining unit (transmitted power difference calculator 22) is configured to determine whether the described transmitted power difference that described transmitted power difference calculator calculates surpasses the threshold value that is provided with based on the maximum transmit power difference that allows between described first carrier and described second carrier wave; And hand-off request transmitter (communication controler 23), be configured to when described transmitted power difference determining unit determines that described transmitted power difference surpasses the threshold value that is provided with based on described maximum transmit power difference, a carrier wave that has low transmitted power in by described first carrier and described second carrier wave is connected to the hand-off request of the wireless base station transmission of wireless communication terminal at a carrier wave that has low transmitted power in described first carrier and described second carrier wave.
Another aspect of the present invention is summarised as, of the present invention above-mentioned aspect in, it is poor that described transmitted power difference calculator calculates transmitted power with predetermined period, described wireless communication terminal also comprises: the difference power determining unit is configured to determine based on the transmitted power difference that described transmitted power difference calculator calculates with predetermined period whether the transmitted power difference increases; Wherein, when definite transmitted power difference was increasing, described hand-off request transmitter has low transmitted power in by described first carrier and described second carrier wave a carrier wave was connected to the hand-off request of the wireless base station transmission of wireless communication terminal at a carrier wave that has low transmitted power in described first carrier and described second carrier wave.
According to these aspects of the present invention, a kind of wireless communications method and base station controller can be provided, can keep multi-carrier communication, control simultaneously with the interference between the preset frequency adjacent carrier adjacent each other at interval.
Description of drawings
Fig. 1 shows the figure according to the overall illustrative configurations of the communication system 300 of first embodiment of present embodiment and the 3rd embodiment.
Fig. 2 shows the figure according to the reverse link frequencies bandwidth of the first embodiment of the present invention and the 3rd embodiment.
Fig. 3 shows the configuration block diagram according to the wireless communication terminal 10 of the first embodiment of the present invention and the 3rd embodiment.
Fig. 4 is the functional configuration block diagram according to the base station controller 200 of the first embodiment of the present invention.
Fig. 5 shows the flow chart according to the operation of the wireless communication terminal 10 of the first embodiment of the present invention.
Fig. 6 shows according to the flow chart of the operation of the base station controller 200 of the first embodiment of the present invention (pattern 1).
Fig. 7 shows according to the flow chart of the operation of the base station controller 200 of the first embodiment of the present invention (pattern 2).
Fig. 8 is the functional configuration block diagram of base station controller 200 according to a second embodiment of the present invention.
Fig. 9 is used to explain according to a second embodiment of the present invention and the figure of the calculating of the estimation curve of the 4th embodiment poor (between the value of calculating by the estimation curve expression formula of carrier wave poor).
Figure 10 shows the flow chart of the operation of base station controller 200 according to a second embodiment of the present invention.
Figure 11 shows the figure of an example that is stored in the table in the memory 19 of a third embodiment in accordance with the invention.
Figure 12 shows the functional configuration block diagram of the controller 20 of a third embodiment in accordance with the invention.
Figure 13 shows the flow chart (pattern 1) of operation of the wireless communication terminal 10 of a third embodiment in accordance with the invention.
Figure 14 shows the flow chart (pattern 2) of operation of the wireless communication terminal 10 of a third embodiment in accordance with the invention.
Figure 15 shows the flow chart (mode 3) of operation of the wireless communication terminal 10 of a third embodiment in accordance with the invention.
Figure 16 shows the flow chart (pattern 4) of operation of the wireless communication terminal 10 of a third embodiment in accordance with the invention.
Figure 17 shows the functional configuration block diagram of the controller 20 of a fourth embodiment in accordance with the invention.
Figure 18 shows the flow chart of operation of the wireless communication terminal 10 of a fourth embodiment in accordance with the invention.
Embodiment
Next embodiments of the invention are described.In following description to accompanying drawing, same or analogous reference number is represented same or analogous part.Yet, it should be noted that accompanying drawing is that schematically the ratio of each size is different with actual ratio.
Therefore, determine concrete size etc. with reference to following description.In addition, in different accompanying drawings, mutual size relationship or ratio certainly may be different.
[first embodiment]
The overall illustrative configurations of communication system
Followingly overall illustrative configurations according to the communication system of the first embodiment of the present invention is described with reference to accompanying drawing.Fig. 1 shows the overall illustrative configurations according to the communication system 300 of first embodiment of present embodiment.
As shown in Figure 1, communication system 300 comprises a plurality of wireless communication terminals 10 (wireless communication terminal 10a is to wireless communication terminal 10c), a plurality of wireless base station 100 (wireless base station 100a and wireless base station 100b) and base station controller 200.
Each wireless communication terminal 10 uses the reverse link frequency band that is allocated for the transmission reverse link data to send reverse link data to each wireless base station 100.Particularly, reverse link frequency band is divided into a plurality of carrier waves.Then, wireless communication terminal 10 uses a plurality of carrier waves (multicarrier) in the upper strata binding to come to send reverse link data to wireless base station 100.
In addition, wireless communication terminal 10 uses the forward link frequency band that is allocated for the transmission forward link data to come the 100 reception forward link datas from the wireless base station.Particularly, forward link frequency band is divided into a plurality of carrier waves.Then, wireless communication terminal 10 uses a plurality of carrier waves (multicarrier) in the upper strata binding to come the 100 reception forward link datas from the wireless base station.
Notice that as the situation of wireless communication terminal 10a or wireless communication terminal 10c, wireless communication terminal 10 can be communicated by letter with single wireless base station 100.In addition, as the situation of wireless communication terminal 10b, wireless communication terminal 10 can be communicated by letter with a plurality of wireless base stations 100.
Wireless base station 100 uses the reverse link frequency band that is allocated for the transmission reverse link data to receive reverse link data from wireless communication terminal 10.Wireless base station 100 also uses the forward link frequency band that is allocated for the transmission forward link data to send forward link datas to wireless communication terminal 10.
The communication of carrying out between base station controller 200 control wireless communication terminals 10 and the wireless base station 100.The operation that base station controller 200 is carried out as handover and so on, in handoff operation, wireless communication terminal 10 switches the wireless base station 100 that communicates with.
In communication system 300, wireless communication terminal 10 is carried out open loop control, controls the transmitted power of reverse link data based on the received power of 100 forward link datas that receive from the wireless base station.Wireless communication terminal 10 is also carried out closed-loop control, controls the transmitted power of reverse link data based on the power control informations of 100 receptions from the wireless base station.Here, power control information is wireless base station 100 based on the quality of reception of the reverse link data that receives from wireless communication terminal 10 (for example ratio (SIR) of signal and interferences) and the information of generation.
Reverse link frequency band
Below with reference to accompanying drawing reverse link frequency band according to the first embodiment of the present invention is described.Fig. 2 shows the reverse link frequency band according to the first embodiment of the present invention.
As shown in Figure 2, reverse link frequency band is divided into a plurality of carrier waves (carrier wave #1 is to carrier wave #n).In addition, the centre frequency of carrier wave is respectively f (1) to f (n).The centre frequency of each carrier wave is adjacent each other, separates with preset frequency interval (for example 1.25MHz).Below two carrier waves that centre frequency is adjacent each other be called adjacent carrier.
The configuration of wireless communication terminal
Below with reference to accompanying drawing configuration according to the wireless communication terminal of the first embodiment of the present invention is described.Fig. 3 shows the configuration block diagram according to the wireless communication terminal 10 of the first embodiment of the present invention.Because wireless communication terminal 10a to 10c has similar configuration, in the following description, it is referred to as wireless communication terminal 10.
As shown in Figure 3, wireless communication terminal 10 comprises antenna 11, RF/IF transducer 12, power amplifier 13, phonetic entry/output unit 14, image I/O unit 15, encoding and decoding processor 16, baseband processor 17, operator 18, memory 19 and controller 20.
Antenna 11 receives the signal (received signal) that wireless base station 100 sends.Antenna 11 also sends signal (transmission signal) to base station 100.
RF/IF transducer 12 is converted to baseband processor 17 frequencies to be processed (intermediate frequency (IF)) with the frequency (radio frequency (RF)) of the received signal that antenna 11 receives.The frequency (IF) of the transmission signal that RF/IF transducer 12 also will obtain from baseband processor 17 is converted to the frequency (RF) that will use the radio communication.In addition, the RF/IF transducer 12 transmission signal that will be converted into radio frequency (RF) inputs to power amplifier 13.
13 pairs of transmission signals that obtain from RF/IF transducer 12 of power amplifier amplify.Amplified transmission signal inputs to antenna 11.
Phonetic entry/output unit 14 has the loud speaker 14b that is used to collect the microphone 14a of voice and is used to export voice.Microphone 14a inputs to encoding and decoding processor 16 based on collected voice with voice signal.Loud speaker 14b exports voice based on the voice signal that obtains from encoding and decoding processor 16.
Image I/O unit 15 comprises the display unit 15b that is used to catch the video camera 15a of object and is used for character display or image etc.Video camera 15a inputs to encoding and decoding processor 16 based on the image of being caught (rest image or moving image) with picture signal.Display unit 15b comes display image based on the picture signal of obtaining from encoding and decoding processor 16.Display unit 15b also shows will be by the character of operator 18 inputs.
Encoding and decoding processor 16 comprises: voice codec processor 16a is used for coming voice signal is carried out Code And Decode according to predictive encoding scheme (for example: EVRC (strengthen variable bit rate encoding and decoding), AMR (senior multi-speed encoding/decoding) or defer to ITU-T G.729); And image coding and decoding processor 16b, be used for coming picture signal is carried out Code And Decode according to predictive encoding scheme (for example MPEG-4 etc.).
Voice codec processor 16a encodes to the voice signal that obtains from phonetic entry/output unit 14.Voice codec processor 16a also decodes to the voice signal that obtains from baseband processor 17.Image coding and decoding processor 16b encodes to the picture signal of obtaining from image I/O unit 15.Image coding and decoding processor 16b also decodes to the picture signal of obtaining from baseband processor 17.
Baseband processor 17 waits modulated transmit signal or demodulated received signal according to predetermined modulation schemes (QPSK or 16QAM).Particularly, baseband processor 17 modulating baseband signals are as voice signal or the picture signal of obtaining from encoding and decoding processor 16.Modulated baseband signal (transmission signal) is inputed to RF/IF transducer 12.Baseband processor 17 is also carried out demodulation to the received signal of obtaining from RF/IF transducer 12.Demodulated received signal (baseband signal) inputs to encoding and decoding processor 16.
The information that 17 pairs of controllers of baseband processor 20 produce is modulated.Modulated information (transmission signal) is inputed to RF/IF transducer 12.Baseband processor 17 is also carried out demodulation to the received signal of obtaining from RF/IF transducer 12.Demodulated received signal inputs to controller 20.
Operator 18 is one group of key, comprises the enter key that is used to allow input character, numeral etc., is used to respond the response key of incoming call (conversation) or the assignment key of be used for breathing out (making a call) etc.In addition, when pressing each key, operator 18 allows to controller 20 inputs and the corresponding input signal of key that is pressed.
Memory 19 storage is used to control program, various types of data of the operation of wireless communication terminal 10, as the history of incoming call/exhalation, address book etc.Memory 19 is formed by flash memories (a kind of nonvolatile semiconductor memory), or by SRAM formation such as (static RAM, a kind of volatile semiconductor memories).
Controller 20 is controlled the operation of wireless communication terminal 10 (image I/O unit 15, encoding and decoding processor 16, baseband processor 17 etc.) according to program stored in the memory 19.
For example, the transmitted power of the reverse link data of controller 20 each carrier wave of control.Particularly, controller 20 is controlled the transmitted power (open loop control) of reverse link data based on the quality of reception (for example SIR) of the forward link data of wireless base station 100 receptions that will send to from reverse link data.
The power control information that controller 20 also receives based on the wireless base station 100 that will send to from reverse link data is controlled the transmitted power (closed-loop control) of reverse link data.As mentioned above, power control information is the information of wireless base station 100 based on the quality of reception (for example SIR) generation of reverse link data.Power control information requires to reduce or increase the transmitted power of reverse link data.
In addition, controller 20 produces power information, and described power information comprises the transmission power value of the reverse link data of being determined by open loop control and closed-loop control.Note, send this power information to base station controller 200 by wireless base station 100.
Here, power information can be the transmission power value that is currently connected to all carrier waves of wireless communication terminal 10, can this power information be sent to base station controller 200 by one of wireless base station 100.In addition, power information can be the information that comprises the transmission power value of the current carrier wave that is used to connect each wireless base station 100 of wireless communication terminal 10, can this power information be sent to base station controller 200 respectively by each wireless base station 100.
Notice that power information can be the information that comprises the transmission power value of one of adjacent carrier.
The configuration of base station controller
Followingly configuration according to the base station controller of the first embodiment of the present invention is described with reference to accompanying drawing.Fig. 4 shows the functional configuration block diagram according to the base station controller 200 of the first embodiment of the present invention.
As shown in Figure 4, base station controller 200 comprises: power information receiver 210, transmitted power difference calculator 220 and handover indication transmitter 230.
Power information receiver 210 is 100 power information that receive the transmission power value comprise one of adjacent carrier (reverse link data) from the wireless base station.
Use carrier wave #1 to be connected to wireless base station 100a and situation that wireless communication terminal 10 also uses carrier wave #2 to be connected to wireless base station 100b is example with wireless communication terminal 10.In this example, power information receiver 210 receives the power information of the transmission power value comprise carrier wave #1 from wireless base station 100a, receives the power information of the transmission power value that comprises carrier wave #2 from wireless base station 100b.
Notice that power information receiver 210 can be concentrated the power information that receives the transmission power value that comprises carrier wave #1 and carrier wave #2 from wireless base station 100a.Similarly, power information receiver 210 can be concentrated the power information that receives the transmission power value that comprises carrier wave #1 and carrier wave #2 from wireless base station 100b.
The power information that transmitted power difference calculator 220 receives based on power information receiver 210 is calculated poor (poor hereinafter referred to as transmitted power) of the transmitted power between the adjacent carrier.In addition, transmitted power difference calculator 220 determines whether transmitted power difference between the adjacent carriers surpasses based on the maximum transmit power that is allowed between the adjacent carrier poor (MaxRLTxPwrDiff) and the threshold value that is provided with.Note, when the transmitted power difference between the adjacent carrier surpassed the threshold value that is provided with based on the maximum transmit power difference, transmitted power difference calculator 220 had surpassed this fact of threshold value that is provided with based on the maximum transmit power difference with the transmitted power difference between the adjacent carrier and has been notified to handover indication transmitter 230.
The threshold value that is provided with based on the maximum transmit power difference can equal maximum transmit power difference itself, maybe can be the value (as by the maximum transmit power difference being multiply by the value that predetermined ratio (0.9) obtains) less than the maximum transmit power difference.
When be informed to transmitted power difference between the adjacent carrier surpassed the threshold value be provided with based on the maximum transmit power difference this when true, the wireless base station 100 that the carrier wave that handover indicates transmitter 230 to have higher transmitted power in by adjacent carrier is connected to wireless communication terminal 10 sends the handovers indication, with indication the carrier wave that has higher transmitted power in the adjacent carrier is carried out handover.
Simultaneously, when be informed to transmitted power difference between the adjacent carrier surpassed the threshold value be provided with based on the maximum transmit power difference this when true, handover indication transmitter 230 can have the wireless base station 100 transmission handovers indications that the carrier wave that hangs down transmitted power is connected to wireless communication terminal 10 in by adjacent carrier, carry out handover with indication to having the carrier wave that hangs down transmitted power in the adjacent carrier.
In addition, handover indication transmitter 230 can be selected as the wireless base station 100 of handover destination with as the carrier wave of handover destination, send the handovers indication to the wireless base station 100 as the handover destination then, this handover indication comprises about the information as the carrier wave of handover destination.
In this case, handover indication transmitter 230 preferably obtains the quality of reception (for example Block Error Rate (BLER)) of the forward link data that wireless communication terminal 10 measures from wireless communication terminal 10, select wireless base station 100 as the handover destination based on the quality of reception of the forward link data that is obtained then.
The operation of wireless communication terminal
Below with reference to accompanying drawing operation according to the wireless communication terminal of the first embodiment of the present invention is described.Fig. 5 is the operation according to the wireless communication terminal 10 of the first embodiment of the present invention.Note, repeat the main of control transmitted power with predetermined period and handle.
Below, comprise that with adjacent carrier the situation of carrier wave #1 and carrier wave #2 is that example is described.In addition, wireless communication terminal 10 uses carrier wave #1 to send reverse link data to wireless base station 100a, and uses carrier wave #2 to send reverse link data to wireless base station 100b.
As shown in Figure 5, in step 10, wireless communication terminal 10 is a target with carrier wave #1, measures the quality of reception of forward link data.Particularly, wireless communication terminal 10 is measured the quality of reception of the forward link data that the wireless base station 100a that will use carrier wave #1 that reverse link data is sent to from wireless communication terminal 10 receives.
In step 11, wireless communication terminal 10 is a target with carrier wave #2, measures the quality of reception of forward link data.Particularly, wireless communication terminal 10 is measured the quality of reception of the forward link data that the wireless base station 100b that will use carrier wave #2 that reverse link data is sent to from wireless communication terminal 10 receives.
In step 12, wireless communication terminal 10 is by open loop control, determines to use the transmitted power of the reverse link data that carrier wave #1 sends.Particularly, wireless communication terminal 10 determines to use the transmitted power of the reverse link data that carrier wave #1 sends based on the quality of reception of measuring in step 10.
In step 13, wireless communication terminal 10 is by open loop control, determines to use the transmitted power of the reverse link data that carrier wave #2 sends.Particularly, wireless communication terminal 10 determines to use the transmitted power of the reverse link data that carrier wave #2 sends based on the quality of reception of measuring in step 11.
In step 14, the power control information that wireless communication terminal 10 receives at carrier wave #1.Particularly, the wireless base station 100a received power control information of wireless communication terminal 10 from using carrier wave #1 that reverse link data is sent to.Note this power control information information that to be wireless base station 100a produce based on the quality of reception of the reverse link data of using carrier wave #1 to send.
In step 15, wireless communication terminal 10 will use the transmitted power of the reverse link data that carrier wave #1 sends by closed-loop control adjustment.Particularly, wireless communication terminal 10 is adjusted at the transmitted power of the reverse link data of determining in the step 12 based on the power control information that receives in step 14.
Particularly, wireless communication terminal 10 is with respectively by open loop control and closed-loop control and definite transmitted power uses carrier wave #1 to send reverse link data.
In step 16, the power control information that wireless communication terminal 10 receives at carrier wave #2.Particularly, the wireless base station 100b received power control information of wireless communication terminal 10 from using carrier wave #2 that reverse link data is sent to.Note this power control information information that to be wireless base station 100b produce based on the quality of reception of the reverse link data of using carrier wave #2 to send.
In step 17, wireless communication terminal 10 will use the transmitted power of the reverse link data that carrier wave #2 sends by closed-loop control adjustment.Particularly, wireless communication terminal 10 is adjusted at the transmitted power of the reverse link data of determining in the step 13 based on the power control information that receives in step 16.
Particularly, wireless communication terminal 10 is with respectively by open loop control and closed-loop control and definite transmitted power uses carrier wave #2 to send reverse link data.
In step 18, wireless communication terminal 10 sends the power control information of the transmission power value that comprises carrier wave #1 to base station controller 200 by wireless base station 100a.In addition, wireless communication terminal 10 sends the power control information of the transmission power value that comprises carrier wave #2 to base station controller 200 by wireless base station 100b.
The operation of base station controller
Followingly operation according to the base station controller of the first embodiment of the present invention is described with reference to accompanying drawing.Fig. 6 and Fig. 7 show the flow chart according to the operation of the base station controller 200 of the first embodiment of the present invention.Particularly, Fig. 6 and Fig. 7 show carry out by base station controller 200, control wireless communication terminal 10 is used to send the flow chart of processing (carrier Control processing) of the carrier wave of reverse link data.
At first describe carrier Control and handle (1) with reference to Fig. 6.As shown in Figure 6, in step 20, base station controller 200 is 100 power information that receive the transmission power value comprise adjacent carrier (carrier wave #1 and carrier wave #2) from the wireless base station.Subsequently, base station controller 200 calculates poor (transmitted power is poor) of the transmitted power of the reverse link data between the adjacent carrier (carrier wave #1 and carrier wave #2).
In step 21, base station controller 200 determines whether the transmitted power difference between the adjacent carriers surpasses based on maximum transmit power poor (MaxRLTxPwrDiff) and the threshold value that is provided with.When the transmitted power difference between the adjacent carrier surpassed the threshold value that is provided with based on the maximum transmit power difference, base station controller 200 proceeded to the processing in the step 22.When the transmitted power difference between the adjacent carrier was no more than the threshold value that is provided with based on the maximum transmit power difference, base station controller 200 stopped carrier Control and handles.
The threshold value that is provided with based on the maximum transmit power difference can equal maximum transmit power difference itself, maybe can be the value (as by the maximum transmit power difference being multiply by the value that predetermined ratio (0.9) obtains) less than the maximum transmit power difference.
In step 22, base station controller 200 has higher transmitted power in by adjacent carrier carrier wave is connected to the handover indication of wireless base station 100 transmissions of wireless communication terminal 10 at the carrier wave that has higher transmitted power in the adjacent carrier.
Next, describe carrier Control with reference to Fig. 7 and handle (2).Note, carry out carrier Control processing (2) and replace above-mentioned carrier Control to handle (1).
As shown in Figure 7, in step 30, base station controller 200 is 100 power information that receive the transmission power value comprise adjacent carrier (carrier wave #1 and carrier wave #2) from the wireless base station.Subsequently, base station controller 200 calculates poor (transmitted power is poor) of the transmitted power of the reverse link data between the adjacent carrier (carrier wave #1 and carrier wave #2).
In step 31, base station controller 200 determines whether the transmitted power difference between the adjacent carriers surpasses based on maximum transmit power poor (MaxRLTxPwrDiff) and the threshold value that is provided with.When the transmitted power difference between the adjacent carrier surpassed the threshold value that is provided with based on the maximum transmit power difference, base station controller 200 proceeded to the processing in the step 32.When the transmitted power difference between the adjacent carrier was no more than the threshold value that is provided with based on the maximum transmit power difference, base station controller 200 stopped the son of transmission power control and handles.
The threshold value that is provided with based on the maximum transmit power difference can equal maximum transmit power difference itself, maybe can be the value (as by the maximum transmit power difference being multiply by the value that predetermined ratio (0.9) obtains) less than the maximum transmit power difference.
In step 32, base station controller 200 has low transmitted power in by adjacent carrier carrier wave is connected to the handover indication of wireless base station 100 transmissions of wireless communication terminal 10 at the carrier wave that has low transmitted power in the adjacent carrier.
Effect and effect
Use is according to the base station controller 200 of the first embodiment of the present invention, when the transmitted power difference between the adjacent carrier surpassed the threshold value that is provided with based on the maximum transmit power difference, handover indication transmitter 230 sent at the handover of this carrier wave to the wireless base station 100 that is connected to wireless communication terminal 10 by the arbitrary carrier wave in the adjacent carrier and indicates.Therefore, the transmitted power difference between the adjacent carrier can be maintained within the maximum transmit power difference.
Therefore, can keep multi-carrier communication, control simultaneously with the interference between the preset frequency adjacent carrier adjacent each other at interval.
[second embodiment]
The second embodiment of the present invention is below described.Difference between above-mentioned first embodiment and second embodiment below will mainly be described.
Particularly, in above-mentioned first embodiment, when the transmitted power difference between the adjacent carrier surpassed the threshold value that is provided with based on the maximum transmit power difference, base station controller 200 sent the handover indication at arbitrary carrier wave in the adjacent carrier.
Different therewith, in a second embodiment, base station controller 200 determines whether the transmitted power difference between the adjacent carrier increases.Then, transmitted power difference between adjacent carrier increases, when the transmitted power difference between the adjacent carrier surpassed the threshold value that is provided with based on the maximum transmit power difference simultaneously, base station controller 200 sent the handover indication at arbitrary carrier wave in the adjacent carrier.
The configuration of base station controller
The configuration of base station controller is according to a second embodiment of the present invention described below with reference to accompanying drawing.Fig. 8 shows the functional configuration block diagram of base station controller 200 according to a second embodiment of the present invention.It should be noted that in Fig. 8, similar reference number is distributed to the configuration similar to Fig. 4.
As shown in Figure 8, outside power information receiver 210, transmitted power difference calculator 220 and handover indication transmitter 230, base station controller 200 also comprises transmitted power difference determining unit 240.
Transmitted power difference calculator 220 is poor with the transmitted power that predetermined period (for example, power information receiver 210 receives the cycle of power information) calculates between the adjacent carrier.
Transmitted power difference determining unit 240 determines whether the transmitted power difference between the adjacent carriers increases, and described difference is that transmitted power difference calculator 220 calculates with predetermined period.Particularly, transmitted power based on reverse link data, transmitted power difference determining unit 240 is calculated the expression formula (hereinafter referred to as the estimation curve expression formula) of estimation curve, the situation that the transmitted power that described estimation curve expression formula shows reverse link data changes at each adjacent carrier on time shaft.Subsequently, transmitted power difference determining unit 240 is determined: whether at the fixed time the section of poor (poor hereinafter referred to as estimation curve) in the value that predetermined instant is calculated by each estimation curve expression formula go up above estimation curve difference limen value.When the estimation curve difference between adjacent carrier when section go up to surpass the estimation curve threshold value at the fixed time, transmitted power difference determining unit 240 with the estimation curve difference between the adjacent carrier at the fixed time section go up and surpass this fact of estimation curve threshold value and be notified to handover indication transmitter 230.
For example, be that the situation of carrier wave #1 and carrier wave #2 is an example with adjacent carrier, the process that is used to calculate the estimation curve difference between carrier wave #1 and the carrier wave #2 is described with reference to Fig. 9.Below, consider the situation of the transmitted power of carrier wave #1 greater than the transmitted power of carrier wave #2.
Here, determine the spill time period by spill (notch) interval of being calculated based on receiving intensity and the quality of reception (SIR).Particularly, the spill time period is included in interval and this peak point spill interval afterwards of peak point spill before of transmitted power estimation curve.Here, when the estimation curve difference between the adjacent carrier surpassed the estimation curve threshold value on the predetermined amount of time of spill in the time period, base station controller 200 sent the handover indication at arbitrary carrier wave in the adjacent carrier.
Particularly, the transmitted power as the carrier wave #1 of moment t place is set to " P #1(t) " time, use following formula (1) to calculate the estimation curve expression formula " M of carrier wave #1 #1(t) ", wherein α is and the corresponding coefficient of carrier wave #1:
[formula 1]
M #1(t)=α * P #1(t)+(1-α) * M #1(t-Δ t) ... expression formula (1)
On the other hand, the transmitted power as the carrier wave #2 of moment t place is set to " P #2(t) " time, use following formula (2) to calculate the estimation curve expression formula " M of carrier wave #2 #2(t) ", wherein β is and the corresponding coefficient of carrier wave #2:
[formula 2]
M #2(t)=β * P #2(t)+(1-β) * M #2(t-Δ t) ... expression formula (2)
In addition, for carrier wave #2 with low transmitted power, use following formula (3) calculate the low estimation curve of carrier wave #2 " M ' #2(t) ":
[formula 3]
M ' #2(t)=M #2(t)-max{M #2(t+ Δ t)-P #2(t+ Δ t) } ... expression formula (3)
In addition, at moment t, the poor (poor " P of estimation curve between the value that value that the estimation curve expression formula of carrier wave #1 is calculated and the estimation curve expression formula of carrier wave #2 are calculated Diff") calculate by following formula (4):
[formula 4]
P Diff=M #1(t)-M ' #2(t) ... expression formula (4)
Subsequently, transmitted power difference determining unit 240 is determined the poor " P of estimation curve that expression formula (1) is calculated to expression formula (4) Diff" whether at the fixed time section is last above estimation curve difference limen value (P Thresh).
Much less, the poor " P of estimation curve Diff" can be estimation curve expression formula " M simply #1(t) " value of being calculated and estimation curve expression formula " M #2(t) " poor between the value of being calculated, rather than estimation curve expression formula " M #1(t) " value of being calculated and low estimation curve expression formula " M ' #2(t) " poor between the value of being calculated.
Notice that transmitted power difference determining unit 240 can be determined the poor " P of estimation curve Diff" whether surpass estimation curve difference limen value (P in the time period in spill Thresh).
When section was upward indicated transmitter 230 above the threshold notification that is provided with based on the maximum transmit power difference to handover above the transmitted power difference between estimation curve threshold value and the adjacent carrier at the fixed time with the estimation curve difference between the adjacent carrier, 230 transmissions of handover indication transmitter were indicated at the handover of arbitrary carrier wave in the adjacent carrier.
The operation of base station controller
The operation of base station controller is according to a second embodiment of the present invention described below with reference to accompanying drawing.Figure 10 shows the flow chart of the operation of base station controller 200 according to a second embodiment of the present invention.Note, carries out carrier Control shown in Figure 10 and handle and replace above-mentioned Fig. 6 and carrier Control processing shown in Figure 7.
Below, identical with the situation of aforesaid first embodiment, be that the situation of carrier wave #1 and carrier wave #2 is that example is described with adjacent carrier.In addition, suppose that wireless communication terminal 10 uses carrier wave #1 to send reverse link data to wireless base station 100a, and use carrier wave #2 to send reverse link data to wireless base station 100b.In addition, suppose the transmitted power of the transmitted power of carrier wave #1 greater than carrier wave #2.
As shown in figure 10, in step 40, base station controller 200 receives the power information of the transmission power value that comprises carrier wave #1 from wireless base station 100a.Subsequently, base station controller 200 calculates the estimation curve expression formula of carrier wave #1 based on the transmitted power of the reverse link data that will send by the carrier wave #1 with higher transmitted power.
In step 41, base station controller 200 receives the power information of the transmission power value that comprises carrier wave #2 from wireless base station 100b.Subsequently, base station controller 200 calculates the estimation curve expression formula (or low estimation curve expression formula) of carrier wave #2 based on the transmitted power of the reverse link data that will send by the carrier wave #2 with low transmitted power.
In step 42, based on the estimation curve expression formula (or low estimation curve expression formula) of the carrier wave #2 that calculates in the estimation curve expression formula of the carrier wave #1 that calculates in the step 40 and the step 41, base station controller 200 determines whether the transmitted power difference between carrier wave #1 and the carrier wave #2 surpasses estimation curve difference limen value.Particularly, poor (estimation curve is poor) between the value of estimation curve expression formula (or hanging down estimation curve expression formula) calculating of the value of the estimation curve expression formula calculating of base station controller 200 calculating use carrier wave #1 and use carrier wave #2.Subsequently, whether at the fixed time base station controller 200 determines these estimation curve differences last estimation curve difference limen value that surpasses of section.
When definite estimation curve difference when section go up to surpass estimation curve difference limen value at the fixed time, base station controller 200 proceeds to the processing of step 43.On the other hand, when definite estimation curve difference when section go up to surpass estimation curve difference limen value at the fixed time, base station controller 200 stops carrier Control and handles.
In step 43, base station controller 200 determines whether the transmitted power difference between carrier wave #1 and the carrier wave #2 surpasses the threshold value that is provided with based on the maximum transmit power difference.When the transmitted power difference surpassed the threshold value that is provided with based on the maximum transmit power difference, base station controller 200 proceeded to the processing in the step 44.When the transmitted power difference was no more than the threshold value that is provided with based on the maximum transmit power difference, base station controller 200 stopped carrier Control and handles.
In step 44, base station controller 200 wireless base station that arbitrary carrier wave connected in adjacent carrier 100 sends the handover indication at this carrier wave.
Effect and effect
Use base station controller 200 according to a second embodiment of the present invention, handover indication transmitter 230 is not the handover indication that sends under the transmitted power difference between the adjacent carrier surpasses the situation of the threshold value that is provided with based on the maximum transmit power difference simply at one of adjacent carrier.Surpass under the situation of the threshold value that is provided with based on the maximum transmit power difference above the transmitted power difference between estimation curve difference limen value and the adjacent carrier on the section at the fixed time in the transmitted power difference between the adjacent carrier, handover indication transmitter 230 sends the handover indication at one of adjacent carrier.
Consider now following situation: the degeneration of the quality of reception that causes owing to influences such as fading effects, by open loop control or closed-loop control, the transmitted power of carrier wave temporarily increases.In this case, even the transmitted power difference between the adjacent carrier temporarily surpasses the threshold value that is provided with based on the maximum transmit power difference, when the influence of fading effect etc. was eliminated, the transmitted power difference between the adjacent carrier fell within the maximum transmit power difference probably.
In the second embodiment of the present invention, temporarily surpass under the situation of the threshold value that is provided with based on the maximum transmit power difference in the transmitted power difference between the above-mentioned adjacent carrier, can prevent from unnecessarily to send the handover indication.
[the 3rd embodiment]
The third embodiment of the present invention is below described.Notice that because identical among the overall illustrative configurations of the communication system of a third embodiment in accordance with the invention and reverse link frequency band and first embodiment, the descriptions thereof are omitted at this.
The configuration of wireless communication terminal
The following configuration of describing the wireless communication terminal of a third embodiment in accordance with the invention with reference to accompanying drawing.
As shown in Figure 3, identical with the situation according to the wireless communication terminal of first embodiment, the wireless communication terminal 10 of a third embodiment in accordance with the invention comprises antenna 11, RF/IF transducer 12, power amplifier 13, phonetic entry/output unit 14, image I/O unit 15, encoding and decoding processor 16, baseband processor 17, operator 18, memory 19 and controller 20.Because identical among the function of antenna 11, RF/IF transducer 12, power amplifier 13, phonetic entry/output unit 14, image I/O unit 15, encoding and decoding processor 16, baseband processor 17 and operator 18 and first embodiment, the descriptions thereof are omitted at this.
As shown in figure 11, memory 19 comprises the table that carrier index, wireless base station and connection status are relative to each other and join.
In " carrier index " field, stored the numbering that is used to identify each carrier wave that is assigned to carrier wave.
In " wireless base station " field, stored and be used to identify the information (as title) that is connected to the wireless base station of wireless communication terminal 10 by each carrier wave.Notice that the combination of carrier index and wireless base station is not static, but change according to the quality of reception of forward link data etc.
In " connection status " field, stored the information (" connection ", " disconnection " and " connection ") of the connection status of representing each carrier wave.Wireless base station 100 in " connection " expression " wireless base station " field is connected to wireless communication terminal 10 by the carrier wave shown in " carrier index " field.Carrier wave in " disconnection " expression " carrier index " field disconnects.The carrier wave that " does not connect " in expression " carrier index " field does not connect as yet.Notice that the carrier wave in " carrier index " field disconnects after the back past predetermined amount of time, the information in " connection status " field is rewritten as " connecting " from " disconnection ".
Controller 20 is controlled the operation of wireless communication terminal 10 (image I/O unit 15, encoding and decoding processor 16, baseband processor 17 etc.) according to program stored in the memory 19.
The configuration of the controller of a third embodiment in accordance with the invention is described below with reference to accompanying drawing.Figure 12 shows the functional configuration block diagram according to the controller 20 of the first embodiment of the present invention.
As shown in figure 12, controller 20 comprises power controller 21, transmitted power difference calculator 22 and communication controler 23.
The transmitted power of the reverse link data of power controller 21 each carrier wave of control.Particularly, power controller 21 is controlled the transmitted power (open loop control) of reverse link data based on the quality of reception (for example SIR) of the forward link data of wireless base station 100 receptions that will send to from reverse link data.
The power control information that power controller 21 also receives based on the wireless base station 100 that will send to from reverse link data is controlled the transmitted power (closed-loop control) of reverse link data.Notice that as mentioned above, power control information is the information of wireless base station 100 based on the quality of reception (for example SIR) generation of reverse link data.Power control information requires to reduce or increase the transmitted power of reverse link data.
Transmitted power difference calculator 22 calculates the transmitted power poor (poor hereinafter referred to as transmitted power) of the reverse link data between the adjacent carrier.In addition, transmitted power difference calculator 22 determines whether transmitted power difference between the adjacent carriers surpasses based on the maximum transmit power that is allowed between the adjacent carrier poor (MaxRLTxPwrDiff) and the threshold value that is provided with.When the transmitted power difference between the adjacent carrier surpassed the threshold value that is provided with based on the maximum transmit power difference, transmitted power difference calculator 22 had surpassed this fact of threshold value that is provided with based on the maximum transmit power difference with the transmitted power difference between the adjacent carrier and has been notified to communication controler 23.
Here, the threshold value that is provided with based on the maximum transmit power difference can equal maximum transmit power difference itself, maybe can be the value (as by the maximum transmit power difference being multiply by the value that predetermined ratio (0.9) obtains) less than the maximum transmit power difference.
When the transmitted power difference between the notified adjacent carrier surpassed the threshold value be provided with based on the maximum transmit power difference this when true, the hand-off request that communication controler 23 will be used for asking the arbitrary carrier wave to adjacent carrier to carry out handover be sent to by hand-off request at the wireless base station 100 that connects of carrier wave.
Note, in adjacent carrier, hand-off request at carrier wave be called as " handoff target carrier wave ", and the carrier wave of not asking it to be carried out handover is called as " non-handoff target carrier wave ".
When wireless base station 100 sends hand-off request, the wireless base station 100 that communication controler 23 is selected as the handover destination from the wireless base station 100 around being arranged in wireless communication terminal 10, and selection will be used to send the carrier wave of reverse link data.Notice that communication controler 23 will indicate as the wireless base station 100 of handover destination and the information that will be used for sending the carrier wave of reverse link data is included in hand-off request, and to wireless base station 100 transmission hand-off request.
Particularly, 23 pairs of the communication controlers quality of reception (for example SIR) that is positioned at the forward link data that the wireless base station 100 around the wireless communication terminal 10 sent is measured.Based on the measured quality of reception, communication controler 23 selects to be connected to the wireless base station 100 of wireless communication terminal 10.For example, communication controler 23 calculates the quality of reception that is connected to the forward link data that the wireless base station 100 of wireless communication terminal 10 sends by non-handoff target carrier wave and poor (quality of reception is poor) between the quality of reception of the forward link data of each wireless base station 100 transmission around the wireless communication terminal 10.Communication controler 23 is selected to have sent the wireless base station 100 of the forward link data with quality of reception difference quality of reception in preset range as the handover destination.
Here, communication controler 23 is with reference to the table of storage in the memory 19, and the information in its " connection status " field removed from will the wireless base station 100 as the handover destination shows the wireless base station 100 of " disconnection ".
Subsequently, communication controler 23 is with reference to the table of storage in the memory 19, and the information from its " connection status " field shows that selection in the carrier wave of " using " or " disconnections " will be used to send the carrier wave of reverse link data.For example, wireless communication terminal 10 selects centre frequencies and information in " connection status " field to show centre frequency farthest the carrier wave apart of the carrier wave of " connection ".
In addition, wireless communication terminal 10 can select transmitted power and the information in " connection status " field to show the approaching carrier wave of transmitted power of the carrier wave of " connection ".
The operation of wireless communication terminal
The operation of the wireless communication terminal of a third embodiment in accordance with the invention is described below with reference to accompanying drawing.Figure 13 to Figure 16 shows the flow chart of operation of the wireless communication terminal 10 of a third embodiment in accordance with the invention.
Below, comprise that with adjacent carrier the situation of carrier wave #1 and carrier wave #2 is that example is described.In addition, wireless communication terminal 10 uses carrier wave #1 to send reverse link data to wireless base station 100a, and uses carrier wave #2 to send reverse link data to wireless base station 100b.
At first, being described with reference to Figure 13 the main of control transmitted power handles.Repeating the main of control transmitted power with predetermined period handles.
As shown in figure 13, in step 110, wireless communication terminal 10 is a target with carrier wave #1, measures the quality of reception of forward link data.Particularly, wireless communication terminal 10 is measured the quality of reception of the forward link data that receives from the wireless base station 100a that will use carrier wave #1 that reverse link data is sent to.
In step 111, wireless communication terminal 10 is a target with carrier wave #2, measures the quality of reception of forward link data.Particularly, wireless communication terminal 10 is measured the quality of reception of the forward link data that receives from the wireless base station 100b that will use carrier wave #2 that reverse link data is sent to.
In step 112, wireless communication terminal 10 is by open loop control, determines to use the transmitted power of the reverse link data that carrier wave #1 sends.Particularly, wireless communication terminal 10 determines to use the transmitted power of the reverse link data that carrier wave #1 sends based on the quality of reception of measuring in step 110.
In step 113, wireless communication terminal 10 is by open loop control, determines to use the transmitted power of the reverse link data that carrier wave #2 sends.Particularly, wireless communication terminal 10 determines to use the transmitted power of the reverse link data that carrier wave #2 sends based on the quality of reception of measuring in step 111.
In step 114, the power control information that wireless communication terminal 10 receives at carrier wave #1.Particularly, the wireless base station 100a received power control information of wireless communication terminal 10 from using carrier wave #1 that reverse link data is sent to.Note this power control information information that to be wireless base station 100a produce based on the quality of reception of the reverse link data of using carrier wave #1 to send.
In step 115, wireless communication terminal 10 will use the transmitted power of the reverse link data that carrier wave #1 sends by closed-loop control adjustment.Particularly, wireless communication terminal 10 is adjusted at the transmitted power of the reverse link data of determining in the step 112 based on the power control information that receives in step 114.
Particularly, wireless communication terminal 10 is with respectively by open loop control and closed-loop control and definite transmitted power uses carrier wave #1 to send reverse link data.
In step 116, the power control information that wireless communication terminal 10 receives at carrier wave #2.Particularly, the wireless base station 100b received power control information of wireless communication terminal 10 from using carrier wave #2 that reverse link data is sent to.Note this power control information information that to be wireless base station 100b produce based on the quality of reception of the reverse link data of using carrier wave #2 to send.
In step 117, wireless communication terminal 10 will use the transmitted power of the reverse link data that carrier wave #2 sends by closed-loop control adjustment.Particularly, wireless communication terminal 10 is adjusted at the transmitted power of the reverse link data of determining in the step 113 based on the power control information that receives in step 116.
Particularly, wireless communication terminal 10 is with respectively by open loop control and closed-loop control and definite transmitted power uses carrier wave #2 to send reverse link data.
Next the son that is described with reference to Figure 14 the control transmitted power is handled (1).Notice that the son processing (1) of control transmitted power enters the main of control transmitted power with the predetermined period interruption and handles.
As shown in figure 14, in step 120, wireless communication terminal 10 calculates poor (transmitted power is poor) of the transmitted power of the reverse link data between the adjacent carrier (carrier wave #1 and carrier wave #2).
In step 121, wireless communication terminal 10 determines whether the transmitted power difference between the adjacent carriers surpasses based on maximum transmit power poor (MaxRLTxPwrDiff) and the threshold value that is provided with.When the transmitted power difference between the adjacent carrier surpassed the threshold value that is provided with based on the maximum transmit power difference, wireless communication terminal 10 proceeded to the processing in the step 122.In addition, when the transmitted power difference between the adjacent carrier was no more than the threshold value that is provided with based on the maximum transmit power difference, wireless communication terminal 10 stopped the son of control transmitted power and handles.
Here, the threshold value that is provided with based on the maximum transmit power difference can equal maximum transmit power difference itself, maybe can be the value (as by the maximum transmit power difference being multiply by the value that predetermined ratio (0.9) obtains) less than the maximum transmit power difference.
In step 122, the wireless base station 100 that wireless communication terminal 10 is selected as the handover destination from the wireless base station 100 around being arranged in wireless communication terminal 10, and selection will be used to send the carrier wave (the handover destination is selected to handle) of reverse link data.Note, will describe the handover destination later in detail and select to handle (with reference to Figure 16).
In step 123, wireless communication terminal 10 has the carrier wave of higher transmitted power in being connected to adjacent carrier wireless base station 100 sends hand-off request, with request the carrier wave that has higher transmitted power in the adjacent carrier is carried out handover.Here, this hand-off request comprises the wireless base station 100 selected and the information of carrier wave of being illustrated in the step 122.
Note, wireless base station 100 indications that receive this hand-off request by the represented wireless base station 100 of the information that comprises in the hand-off request by being connected to wireless communication terminal 10 by the represented carrier wave of the information that comprises in the hand-off request.
Next, the son that is described with reference to Figure 15 the control transmitted power is handled (2).Notice that the situation of handling (1) with the son of control transmitted power is identical, control the son of transmitted power and handle (2) interrupt entering the control transmitted power with predetermined period main processing.
As shown in figure 15, in step 130, wireless communication terminal 10 calculates poor (transmitted power is poor) of the transmitted power of the reverse link data between the adjacent carrier (carrier wave #1 and carrier wave #2).
In step 131, wireless communication terminal 10 determines whether the transmitted power difference between the adjacent carriers surpasses based on maximum transmit power poor (MaxRLTxPwrDiff) and the threshold value that is provided with.When the transmitted power difference between the adjacent carrier surpassed the threshold value that is provided with based on the maximum transmit power difference, wireless communication terminal 10 proceeded to the processing in the step 132.In addition, when the transmitted power difference between the adjacent carrier was no more than the threshold value that is provided with based on the maximum transmit power difference, wireless communication terminal 10 stopped the son of control transmitted power and handles.
Here, the threshold value that is provided with based on the maximum transmit power difference can equal maximum transmit power difference itself, maybe can be the value (as by the maximum transmit power difference being multiply by the value that predetermined ratio (0.9) obtains) less than the maximum transmit power difference.
In step 132, the wireless base station 100 that wireless communication terminal 10 is selected as the handover destination from the wireless base station 100 around being arranged in wireless communication terminal 10, and selection will be used to send the carrier wave (the handover destination is selected to handle) of reverse link data.Note, will describe the handover destination later in detail and select to handle (with reference to Figure 16).
In step 133, the wireless base station 100 that wireless communication terminal 10 is connected to the carrier wave that has low transmitted power in the adjacent carrier sends hand-off request, with request the carrier wave that has low transmitted power in the adjacent carrier is carried out handover.Here, this hand-off request comprises the wireless base station 100 selected and the information of carrier wave of being illustrated in the step 132.
Note, wireless base station 100 indications that receive this hand-off request by the represented wireless base station 100 of the information that comprises in the hand-off request by being connected to wireless communication terminal 10 by the represented carrier wave of the information that comprises in the hand-off request.
At last, describing the handover destination shown in Figure 14 and Figure 15 in detail with reference to Figure 16 selects to handle.
As shown in figure 16, in step 140,10 pairs of wireless communication terminals are positioned at the quality of reception (for example SIR) of the forward link data that the wireless base station 100 around the wireless communication terminal 10 sent and measure.
In step 141, wireless communication terminal 10 is based on the quality of reception of measuring in step 140, and selection will be connected to the wireless base station 100 of wireless communication terminal 10.For example, wireless communication terminal 10 calculates the quality of reception that is connected to the forward link data that the wireless base station 100 of wireless communication terminal 10 sends by non-handoff target carrier wave and poor (quality of reception is poor) between the quality of reception of the forward link data of each wireless base station 100 transmission around the wireless communication terminal 10.Communication controler 23 is selected to have sent the wireless base station 100 of the forward link data with quality of reception difference quality of reception in preset range as the handover destination.
Here, wireless communication terminal 10 is with reference to the table of storage in the memory 19, and the information in its " connection status " field removed from the wireless base station 100 that will be connected to wireless communication terminal 10 shows the wireless base station 100 of " disconnection ".
In step 142, wireless communication terminal 10 is with reference to the table of storage in the memory 19, and selection will be used for the carrier wave that reverse link data sends in the carrier wave of the demonstration of the information from its " connection status " field " use " or " disconnection ".For example, wireless communication terminal 10 selects centre frequencies and information in " connection status " field to show centre frequency farthest the carrier wave apart of the carrier wave of " connection ".
In addition, wireless communication terminal 10 can select transmitted power and the information in " connection status " field to show the approaching carrier wave of transmitted power of the carrier wave of " connection ".
Effect and effect
Use the wireless communication terminal 10 of a third embodiment in accordance with the invention, surpass poor based on maximum transmit power (MaxRLTxPwrDiff) and under the situation of the threshold value that is provided with in the transmitted power difference between the adjacent carrier, the hand-off request that communication controler 23 sends at the carrier wave with higher-wattage to the wireless base station 100 that is connected to wireless communication terminal 10 by the carrier wave with higher-wattage.
In addition, use the wireless communication terminal 10 of a third embodiment in accordance with the invention, surpass poor based on maximum transmit power (MaxRLTxPwrDiff) and under the situation of the threshold value that is provided with in the transmitted power difference between the adjacent carrier, the hand-off request that communication controler 23 sends at the carrier wave with lower-wattage to the wireless base station 100 that is connected to wireless communication terminal 10 by the carrier wave with lower-wattage.
Therefore, can keep multi-carrier communication, control simultaneously with the interference between the preset frequency adjacent carrier adjacent each other at interval.
In addition, use the wireless communication terminal 10 of a third embodiment in accordance with the invention, communication controler 23 will represent to be included in hand-off request as the wireless base station 100 of handover destination and the carrier wave that will be used for sending reverse link data.
In this case, communication controler 23 is with reference to the table of storage in the memory 19, and the information in its " connection status " field removed from the wireless base station 100 that will be connected to wireless communication terminal 10 shows the wireless base station 100 of " disconnection ".Therefore, when wireless communication terminal 10 was connected to wireless base station 100 by new carrier wave, the possibility that the transmitted power difference surpasses the threshold value that is provided with based on the maximum transmit power difference reduced.
In addition, because communication controler 23 is selected wireless base station 100 as the handover destination based on the quality of reception of forward link data, therefore, when wireless communication terminal 10 was connected to wireless base station 100 by new carrier wave, the possibility that the transmitted power difference surpasses the threshold value that is provided with based on the maximum transmit power difference reduced.
[the 4th embodiment]
The fourth embodiment of the present invention is below described.Difference between above-mentioned the 3rd embodiment and the 4th embodiment below will mainly be described.
Particularly, in above-mentioned the 3rd embodiment, when the transmitted power difference between the adjacent carrier surpassed the threshold value that is provided with based on the maximum transmit power difference, wireless communication terminal 10 sent hand-off request, with request the arbitrary carrier wave in the adjacent carrier is carried out handover.
Different therewith, in the 4th embodiment, wireless communication terminal 10 determines whether the transmitted power difference between the adjacent carrier increases.Then, transmitted power difference between adjacent carrier is just honest, and when the transmitted power difference between the adjacent carrier surpassed the threshold value that is provided with based on the maximum transmit power difference, wireless communication terminal 10 sent hand-off request, with request the arbitrary carrier wave in the adjacent carrier is carried out handover.
The configuration of wireless communication terminal
The configuration of the wireless communication terminal of a fourth embodiment in accordance with the invention is described below with reference to accompanying drawing.Figure 17 shows the configuration block diagram of controller 20 of the wireless communication terminal 10 of a fourth embodiment in accordance with the invention.It should be noted that in Figure 17, similar reference number is distributed to the configuration similar to Figure 12.
As shown in figure 17, outside power controller 21, transmitted power difference calculator 22 and communication controler 23, wireless communication terminal 10 also comprises transmitted power difference determining unit 25.
Transmitted power difference calculator 22 is poor with the transmitted power that predetermined period (for example, the cycle of power controller 21 execution transmission power control) calculates between the adjacent carrier.
Transmitted power difference determining unit 25 determines whether the transmitted power difference between the adjacent carriers increases, and described difference is that transmitted power difference calculator 22 calculates with predetermined period.Particularly, transmitted power based on reverse link data, transmitted power difference determining unit 25 is calculated the expression formula (hereinafter referred to as the estimation curve expression formula) of estimation curve, the situation that the transmitted power that described estimation curve expression formula shows reverse link data changes at each adjacent carrier on time shaft.Subsequently, transmitted power difference determining unit 25 is determined: whether at the fixed time the section of poor (poor hereinafter referred to as estimation curve) in the value that predetermined instant is calculated by each estimation curve expression formula go up above estimation curve difference limen value.When the estimation curve difference between adjacent carrier when section go up to surpass the estimation curve threshold value at the fixed time, transmitted power difference determining unit 25 with the estimation curve difference between the adjacent carrier at the fixed time section go up and surpass this fact of estimation curve threshold value and be notified to communication controler 23.
For example, be that the situation of carrier wave #1 and carrier wave #2 is an example with adjacent carrier, the process that is used to calculate the estimation curve difference between carrier wave #1 and the carrier wave #2 is described with reference to Fig. 9.Below, consider the situation of the transmitted power of carrier wave #1 greater than the transmitted power of carrier wave #2.
Note, determine the spill time period by the spill interval of being calculated based on receiving intensity or the quality of reception (SIR).Particularly, the spill time period is included in interval and this peak point spill interval afterwards of peak point spill before of transmitted power estimation curve.Here, when the estimation curve difference between the adjacent carrier on the whole predetermined amount of time of this spill in the time period during all above the estimation curve threshold value, wireless communication terminal 10 sends hand-off request, with request the arbitrary carrier wave in the adjacent carrier is carried out handover.
Particularly, the transmitted power as the carrier wave #1 of moment t place is set to " P #1(t) " time, use following formula (1) to calculate the estimation curve expression formula " M of carrier wave #1 #1(t) ", wherein α is and the corresponding coefficient of carrier wave #1:
[formula 1]
M #1(t)=α * P #1(t)+(1-α) * M #1(t-Δ t) ... expression formula (1)
On the other hand, the transmitted power as the carrier wave #2 of moment t place is set to " P #2(t) " time, use following formula (2) to calculate the estimation curve expression formula " M of carrier wave #2 #2(t) ", wherein β is and the corresponding coefficient of carrier wave #2:
[formula 2]
M #2(t)=β * P #2(t)+(1-β) * M #2(t-Δ t) ... expression formula (2)
In addition, for carrier wave #2 with low transmitted power, use following formula (3) calculate the low estimation curve of carrier wave #2 " M ' #2(t) ":
[formula 3]
M ' #2(t)=M #2(t)-max{M #2(t+ Δ t)-P #2(t+ Δ t) } ... expression formula (3)
In addition, at moment t, the poor (poor " P of estimation curve between the value that value that the estimation curve expression formula of carrier wave #1 is calculated and the estimation curve expression formula of carrier wave #2 are calculated Diff") calculate by following formula (4):
[formula 4]
P Diff=M #1(t)-M ' #2(t) ... expression formula (4)
Subsequently, transmitted power difference determining unit 25 is determined the poor " P of estimation curve that expression formula (1) is calculated to expression formula (4) Diff" whether at the fixed time section is last above estimation curve difference limen value (P Thresh).
Much less, the poor " P of estimation curve Diff" can be estimation curve expression formula " M simply #1(t) " value of being calculated and estimation curve expression formula " M #2(t) " poor between the value of being calculated, rather than estimation curve expression formula " M #1(t) " value of being calculated and low estimation curve expression formula " M ' #2(t) " poor between the value of being calculated.
Here, transmitted power difference determining unit 25 can be determined the poor " P of estimation curve Diff" whether surpass estimation curve difference limen value (P in the time period in spill Thresh).
When the estimation curve difference between the adjacent carrier is all surpassed the threshold value be provided with based on the maximum transmit power difference above the transmitted power difference between estimation curve threshold value and the adjacent carrier on whole predetermined amount of time the fact is notified to communication controler 23, communication controler 23 sends hand-off request, with request the arbitrary carrier wave in the adjacent carrier is carried out handover.
The operation of wireless communication terminal
The operation of the wireless communication terminal of a fourth embodiment in accordance with the invention is described below with reference to accompanying drawing.Figure 18 shows the flow chart of the operation of wireless communication terminal 10 according to a second embodiment of the present invention.Notice that the son of carrying out control transmitted power shown in Figure 180 is handled the son processing that replaces aforesaid Figure 14 and control transmitted power shown in Figure 15.
Below, identical with the situation of aforesaid the 3rd embodiment, be that the situation of carrier wave #1 and carrier wave #2 is that example is described with adjacent carrier.In addition, wireless communication terminal 10 uses carrier wave #1 to send reverse link data to wireless base station 100a, and uses carrier wave #2 to send reverse link data to wireless base station 100b.In addition, the transmitted power of carrier wave #1 is greater than the transmitted power of carrier wave #2.
As shown in figure 18, in step 150, wireless communication terminal 10 calculates the estimation curve expression formula of carrier wave #1 based on the transmitted power of the reverse link data that sends by the carrier wave #1 with higher transmitted power.
In step 151, wireless communication terminal 10 calculates the estimation curve expression formula (or low estimation curve expression formula) of carrier wave #2 based on the transmitted power of the reverse link data that sends by the carrier wave #2 with low transmitted power.
In step 152, based on the estimation curve expression formula (or low estimation curve expression formula) of the carrier wave #2 that calculates in the estimation curve expression formula of the carrier wave #1 that calculates in the step 150 and the step 151, wireless communication terminal 10 determines whether the transmitted power difference between carrier wave #1 and the carrier wave #2 surpasses estimation curve difference limen value.Particularly, poor (estimation curve is poor) between the value of estimation curve expression formula (or hanging down estimation curve expression formula) calculating of the value of the estimation curve expression formula calculating of wireless communication terminal 10 calculating use carrier wave #1 and use carrier wave #2.Subsequently, whether at the fixed time wireless communication terminal 10 determines these estimation curve differences last estimation curve difference limen value that surpasses of section.
When determining that in step 152 the estimation curve difference surpasses estimation curve difference limen value on the section at the fixed time, wireless communication terminal 10 proceeds to the processing of step 153.On the other hand, when determining that in step 152 the estimation curve difference does not surpass estimation curve difference limen value on the section at the fixed time, wireless communication terminal 10 stops the son of control transmitted powers and handles.
In step 153, wireless communication terminal 10 determines whether the transmitted power difference between carrier wave #1 and the carrier wave #2 surpasses the threshold value that is provided with based on the maximum transmit power difference.When determining that the transmitted power difference surpasses the threshold value that is provided with based on the maximum transmit power difference in step 153, wireless communication terminal 10 proceeds to the processing in the step 154.When determining that the transmitted power difference is no more than the threshold value that is provided with based on the maximum transmit power difference in step 153, wireless communication terminal 10 stops the son of control transmitted power and handles.
In step 154, the wireless base station 100 that wireless communication terminal 10 is selected as the handover destination from the wireless base station 100 around being arranged in wireless communication terminal 10, and selection will be used to send the carrier wave (the handover destination is selected to handle) of reverse link data.Notice that this handover destination is selected to handle identical with above-mentioned processing shown in Figure 16.
In step 154, the wireless base station 100 of the handoff target carrier wave of wireless communication terminal 10 in being connected to adjacent carrier sends hand-off request, with request the handoff target carrier wave in the adjacent carrier is carried out handover.Here, this hand-off request comprises the wireless base station 100 selected and the information of carrier wave of being illustrated in the step 154.
Note, wireless base station 100 indications that receive this hand-off request by the represented wireless base station 100 of the information that comprises in the hand-off request by being connected to wireless communication terminal 10 by the represented carrier wave of the information that comprises in the hand-off request.
Effect and effect
The wireless communication terminal 10 of a fourth embodiment in accordance with the invention, communication controler 23 is not to send hand-off request simply under the situation of the transmitted power difference between the adjacent carrier above the threshold value that is provided with based on the maximum transmit power difference, with request one of adjacent carrier is carried out handover.When the transmitted power difference between adjacent carrier surpasses transmitted power difference between estimation curve difference limen value and the adjacent carrier at the fixed time on the section and surpasses the threshold value that is provided with based on the maximum transmit power difference, communication controler 23 sends hand-off request, with request one of adjacent carrier is carried out handover.
Consider now following situation: the degeneration of the quality of reception that causes owing to influences such as fading effects, by open loop control or closed-loop control, the transmitted power of carrier wave temporarily increases.In this case, even the transmitted power difference between the adjacent carrier temporarily surpasses the threshold value that is provided with based on the maximum transmit power difference, when the influence of fading effect etc. was eliminated, the transmitted power difference between the adjacent carrier fell within the maximum transmit power difference probably.
In the fourth embodiment of the present invention, when the transmitted power difference between the adjacent carrier temporarily surpasses the threshold value that is provided with based on the maximum transmit power difference as mentioned above, can prevent from unnecessarily to send hand-off request.
Other embodiment
As mentioned above, by embodiments of the invention content of the present invention is disclosed.Yet the description and the accompanying drawing that constitute a part of this disclosure should not be interpreted as limitation of the present invention.To those skilled in the art, by the disclosure, various optional embodiment are conspicuous.
For example, in above-mentioned first embodiment and second embodiment, determine to send hand-off request at the arbitrary carrier wave in the adjacent carrier based on what whether the transmitted power difference between the adjacent carrier is surpassed the threshold value that is provided with based on the maximum transmit power difference.Yet the present invention should not be limited to this.
Particularly, can determine to send hand-off request based on what whether the transmitted power difference between two non-conterminous carrier waves is surpassed the threshold value that is provided with based on the maximum transmit power difference at the arbitrary carrier wave in the adjacent carrier.
In this case, define predetermined threshold according to the distance between the centre frequency of these two carrier waves of separating mutually.Particularly, the centre frequency of two carrier waves is separated far away more mutually, and the degree that interferes with each other of these two carrier waves is low more.Therefore, predetermined threshold is defined as lower value.
In addition, in above-mentioned the 3rd to the 4th embodiment, wireless communication terminal 10 based on whether the transmitted power difference between the adjacent carrier is surpassed the threshold value that is provided with based on the maximum transmit power difference determine ask arbitrary carrier wave to carry out handover in the adjacent carrier.Yet the present invention should not be limited to this.
Particularly, wireless communication terminal 10 can based on whether the transmitted power difference between two non-conterminous carrier waves is surpassed the threshold value that is provided with based on the maximum transmit power difference determine ask arbitrary carrier wave to carry out handover in the adjacent carrier.
In this case, define predetermined threshold according to the distance between the centre frequency of these two carrier waves of separating mutually.Particularly, the centre frequency of two carrier waves is separated far away more mutually, and the degree that interferes with each other of these two carrier waves is low more.Therefore, predetermined threshold is defined as lower value.
In addition, in the handover destination shown in the 3rd to the 4th embodiment was selected to handle, wireless communication terminal 10 selected will be used to send the carrier wave of reverse link data after selecting as the wireless base station 100 of handover destination.Yet the present invention should not be limited to this.
Particularly, wireless communication terminal 10 can be after selecting to be used to send the carrier wave of reverse link data selection as the wireless base station 100 of handover destination.
Here, generally speaking, control the transmitted power of reverse link carriers based on the quality of reception of the data that wireless communication terminal received, described data are that the wireless base station that is connected to from reverse link carriers sends.Particularly, if higher from the quality of reception of the data of wireless base station, then with the transmission power control of reverse link carriers for lower.If the quality of reception from the data of wireless base station is lower, then the transmission power control with reverse link carriers is higher.Correspondingly, generally speaking, for the wireless base station that is sent in the data that have less quality of reception difference in the wireless communication terminal, the transmitted power difference that is connected between the reverse link carriers of this wireless base station is also less.
Here, when the wireless base station 100 selected after the carrier wave of selecting to be used to send reverse link data as the handover destination, the following process of wireless communication terminal 10 uses is selected the wireless base station 100 as the handover destination.
(1) quality of reception of calculating the data that send from the wireless base station of current connection poor with between the quality of reception of the data of handover destination candidate base station transmission.
(2) select to have sent the wireless base station of wireless base station with less quality of reception difference (it is poor that the data that this wireless base station sends have smaller transmission power with respect to the reverse link carriers of the wireless base station that is connected to current connection) as the handover destination.
Can determine the tolerance limit of the difference between the above-mentioned quality of reception according to the distance between the centre frequency of carrier wave that is selected for the transmission reverse link data and non-handoff target carrier wave.Particularly, the centre frequency of two carrier waves is separated mutually far away more, and the degree that interferes with each other of these two carrier waves is low more, so the tolerance limit of the difference between the quality of reception can relatively large (tolerance limit of the difference of the transmitted power of reverse link carriers).On the other hand, the centre frequency of two carrier waves is approaching more mutually, and the degree that interferes with each other of these two carrier waves is high more, so the tolerance limit of the difference between the quality of reception can preferably be set to as far as possible little (tolerance limit of the difference of the transmitted power of reverse link carriers).
In addition, can provide with the form of the executable program on the computer according to the operation of the base station controller 200 of above-mentioned first and second embodiment and according to the operation of the wireless communication terminal 10 of above-mentioned the 3rd to the 4th embodiment.
In this manner, much less, the present invention comprises the various embodiment that do not describe here.Therefore, technical scope of the present invention should be only according to the scope of the claims of rationally summarizing from the above description, and the flesh and blood proprietary by the present invention limits.
The full content of Japanese patent application No.2006-207239 (on July 28th, 2006 submitted) and No.2006-207253 (on July 28th, 2006 submitted) is incorporated herein by reference.
The industry practicality
As mentioned above, according to wireless communications method of the present invention, base station controller and radio communication Terminal can be kept multi-carrier wireless communication, controls simultaneously with predetermined frequency interval adjacent each other Interference between the adjacent carrier. Correspondingly, wireless communications method of the present invention and radio communication are eventually End is applicable to the radio communication such as mobile communication and so on.

Claims (16)

1. wireless communications method that uses multicarrier at reverse link from wireless communication terminal to the wireless base station, described multicarrier uses the first carrier and second carrier wave at least, described second carrier wave is adjacent with described first carrier at interval with preset frequency, said method comprising the steps of:
Obtain the transmission power value of described first carrier and the transmission power value of described second carrier wave from the wireless base station;
The transmitted power of calculating between described first carrier and described second carrier wave is poor;
Determine whether described transmitted power difference surpasses the threshold value that is provided with based on the maximum transmit power difference that allows between described first carrier and described second carrier wave; And
When described transmitted power difference surpassed the threshold value that is provided with based on described maximum transmit power difference, a carrier wave that has higher transmission power value in by described first carrier and described second carrier wave was connected to the handover indication of the wireless base station transmission of wireless communication terminal at a carrier wave that has higher transmission power value in described first carrier and described second carrier wave.
2. wireless communications method according to claim 1, wherein, in the step of calculating the transmitted power difference, it is poor to calculate transmitted power with predetermined period,
Described wireless communications method is further comprising the steps of: poor based on the transmitted power of calculating with predetermined period, determine whether the transmitted power difference increases; Wherein,
When definite transmitted power difference is increasing, in the step that sends the handover indication, a carrier wave that has higher transmitted power in by described first carrier and described second carrier wave is connected to the handover indication of the wireless base station transmission of wireless communication terminal at a carrier wave that has higher transmitted power in described first carrier and described second carrier wave.
3. wireless communications method that uses multicarrier at reverse link from wireless communication terminal to the wireless base station, described multicarrier uses the first carrier and second carrier wave at least, described second carrier wave is adjacent with described first carrier at interval with preset frequency, said method comprising the steps of:
Obtain the transmission power value of described first carrier and the transmission power value of described second carrier wave from the wireless base station;
The transmitted power of calculating between described first carrier and described second carrier wave is poor;
Determine whether described transmitted power difference surpasses the threshold value that is provided with based on the maximum transmit power difference that allows between described first carrier and described second carrier wave; And
When described transmitted power difference surpassed the threshold value that is provided with based on described maximum transmit power difference, a carrier wave that has low transmission power value in by described first carrier and described second carrier wave was connected to the handover indication of the wireless base station transmission of wireless communication terminal at a carrier wave that has low transmission power value in described first carrier and described second carrier wave.
4. wireless communications method according to claim 3, in the step of calculating the transmitted power difference, it is poor to calculate transmitted power with predetermined period,
Described wireless communications method is further comprising the steps of: poor based on the transmitted power of calculating with predetermined period, determine whether the transmitted power difference increases; Wherein,
When definite transmitted power difference is increasing, in the step that sends the handover indication, a carrier wave that has low transmission power value in by described first carrier and described second carrier wave is connected to the handover indication of the wireless base station transmission of wireless communication terminal at a carrier wave that has low transmission power value in described first carrier and described second carrier wave.
5. base station controller, be used to be controlled at the communication of reverse link use multicarrier from wireless communication terminal to the wireless base station, described multicarrier uses the first carrier and second carrier wave at least, described second carrier wave is adjacent with described first carrier at interval with preset frequency, and described base station controller comprises:
The transmission power value acquiring unit is configured to obtain from the wireless base station transmission power value of described first carrier and the transmission power value of described second carrier wave;
Transmitted power difference calculator, it is poor to be configured to the transmitted power that the transmission power value of the transmission power value of the described first carrier that obtained based on described transmission power value acquiring unit and described second carrier wave calculates between described first carrier and described second carrier wave;
Transmitted power difference determining unit is configured to determine whether the transmitted power difference that described transmitted power difference calculator calculates surpasses the threshold value that is provided with based on the maximum transmit power difference that allows between described first carrier and described second carrier wave; And
Handover indication transmitter, be configured to when described transmitted power difference determining unit determines that described transmitted power difference surpasses the threshold value that is provided with based on described maximum transmit power difference, a carrier wave that has higher transmission power value in by described first carrier and described second carrier wave is connected to the handover indication of the wireless base station transmission of wireless communication terminal at a carrier wave that has higher transmission power value in described first carrier and described second carrier wave.
6. base station controller according to claim 5, wherein, it is poor that described transmitted power difference calculator calculates transmitted power with predetermined period,
Described controller also comprises: the difference power determining unit, and it is poor with the transmitted power that predetermined period calculates to be configured to based on described transmitted power difference calculator, determines whether the transmitted power difference increases; Wherein,
When definite transmitted power difference was increasing, described handover indication transmitter has higher transmission power value in by described first carrier and described second carrier wave a carrier wave was connected to the handover indication of the wireless base station transmission of wireless communication terminal at a carrier wave that has higher transmission power value in described first carrier and described second carrier wave.
7. base station controller, be used to be controlled at the communication of reverse link use multicarrier from wireless communication terminal to the wireless base station, described multicarrier uses the first carrier and second carrier wave at least, and described second carrier wave is adjacent with described first carrier at interval with preset frequency, and described controller comprises:
The transmission power value acquiring unit is configured to obtain from the wireless base station transmission power value of described first carrier and the transmission power value of described second carrier wave;
Transmitted power difference calculator, it is poor to be configured to the transmitted power that the transmission power value of the transmission power value of the described first carrier that obtained based on described transmission power value acquiring unit and described second carrier wave calculates between described first carrier and described second carrier wave;
Transmitted power difference determining unit is configured to determine whether the transmitted power difference that described transmitted power difference calculator calculates surpasses the threshold value that is provided with based on the maximum transmit power difference that allows between described first carrier and described second carrier wave; And
Handover indication transmitter, be configured to when described transmitted power difference determining unit determines that described transmitted power difference surpasses the threshold value that is provided with based on described maximum transmit power difference, a carrier wave that has low transmission power value in by described first carrier and described second carrier wave is connected to the handover indication of the wireless base station transmission of wireless communication terminal at a carrier wave that has low transmission power value in described first carrier and described second carrier wave.
8. base station controller according to claim 7, wherein, it is poor that described transmitted power difference calculator calculates transmitted power with predetermined period,
Described base station controller also comprises: the difference power determining unit, and it is poor with the transmitted power that predetermined period calculates to be configured to based on described transmitted power difference calculator, determines whether the transmitted power difference increases; Wherein,
When definite transmitted power difference was increasing, the wireless base station that described handover indication transmitter has low transmission power value in by described first carrier and described second carrier wave a carrier wave is connected to wireless communication terminal sent at the handover indication that has in described first carrier and described second carrier wave than a carrier wave of low transmission power value.
9. one kind is used the wireless communications method of multicarrier at reverse link, and described multicarrier uses the first carrier and second carrier wave at least, and described second carrier wave is adjacent with described first carrier at interval with preset frequency, said method comprising the steps of:
The transmitted power of calculating between described first carrier and described second carrier wave is poor;
Determine whether described transmitted power difference surpasses the threshold value that is provided with based on the maximum transmit power difference that allows between described first carrier and described second carrier wave; And
When described transmitted power difference surpassed the threshold value that is provided with based on described maximum transmit power difference, a carrier wave that has higher transmitted power in by described first carrier and described second carrier wave was connected to the wireless base station transmission of wireless communication terminal at the hand-off request that has a carrier wave of higher transmitted power in described first carrier and described second carrier wave.
10. wireless communications method according to claim 9, wherein, in the step of calculating the transmitted power difference, it is poor to calculate transmitted power with predetermined period,
Described wireless communications method is further comprising the steps of: poor based on the transmitted power of calculating with predetermined period, determine whether the transmitted power difference increases; Wherein,
When definite transmitted power difference is increasing, in the step that sends hand-off request, a carrier wave that has higher transmitted power in by described first carrier and described second carrier wave is connected to the wireless base station transmission of wireless communication terminal at the hand-off request that has a carrier wave of higher transmitted power in described first carrier and described second carrier wave.
11. the wireless communications method at reverse link use multicarrier, described multicarrier uses the first carrier and second carrier wave at least, and described second carrier wave is adjacent with described first carrier at interval with preset frequency, said method comprising the steps of:
The transmitted power of calculating between described first carrier and described second carrier wave is poor;
Determine whether described transmitted power difference surpasses the threshold value that is provided with based on the maximum transmit power difference that allows between described first carrier and described second carrier wave; And
When described transmitted power difference surpassed the threshold value that is provided with based on described maximum transmit power difference, a carrier wave that has low transmitted power in by described first carrier and described second carrier wave was connected to the hand-off request of the wireless base station transmission of wireless communication terminal at a carrier wave that has low transmitted power in described first carrier and described second carrier wave.
12. wireless communications method according to claim 11, wherein, in the step of calculating the transmitted power difference, it is poor to calculate transmitted power with predetermined period,
Described wireless communications method is further comprising the steps of: poor based on the transmitted power of calculating with predetermined period, determine whether the transmitted power difference increases; Wherein,
When definite transmitted power difference is increasing, in the step that sends hand-off request, a carrier wave that has low transmitted power in by described first carrier and described second carrier wave is connected to the hand-off request of the wireless base station transmission of wireless communication terminal at a carrier wave that has low transmitted power in described first carrier and described second carrier wave.
13. a wireless communication terminal that uses multicarrier to come executive communication, described multicarrier use the first carrier and second carrier wave at least, described second carrier wave is adjacent with described first carrier at interval with preset frequency, and described communication terminal comprises:
Transmitted power difference calculator, it is poor to be configured to the transmitted power calculated between described first carrier and described second carrier wave;
Transmitted power difference determining unit is configured to determine whether the described transmitted power difference that described transmitted power difference calculator calculates surpasses the threshold value that is provided with based on the maximum transmit power difference that allows between described first carrier and described second carrier wave; And
The hand-off request transmitter, be configured to when described transmitted power difference determining unit determines that described transmitted power difference surpasses the threshold value that is provided with based on described maximum transmit power difference, a carrier wave that has higher transmitted power in by described first carrier and described second carrier wave is connected to the wireless base station transmission of wireless communication terminal at the hand-off request that has a carrier wave of higher transmitted power in described first carrier and described second carrier wave.
14. wireless communication terminal according to claim 13, wherein, it is poor that described transmitted power difference calculator calculates transmitted power with predetermined period,
Described communication terminal also comprises: the difference power determining unit, and it is poor with the transmitted power that predetermined period calculates to be configured to based on described transmitted power difference calculator, determines whether the transmitted power difference increases; Wherein,
When definite transmitted power difference was increasing, described hand-off request transmitter has higher transmitted power in by described first carrier and described second carrier wave a carrier wave was connected to the wireless base station transmission of wireless communication terminal at the hand-off request that has a carrier wave of higher transmitted power in described first carrier and described second carrier wave.
15. a wireless communication terminal that uses multicarrier to come executive communication, described multicarrier use the first carrier and second carrier wave at least, described second carrier wave is adjacent with described first carrier at interval with preset frequency, and described communication terminal comprises:
Transmitted power difference calculator, it is poor to be configured to the transmitted power calculated between described first carrier and described second carrier wave;
Transmitted power difference determining unit is configured to determine whether the described transmitted power difference that described transmitted power difference calculator calculates surpasses the threshold value that is provided with based on the maximum transmit power difference that allows between described first carrier and described second carrier wave; And
The hand-off request transmitter, be configured to when described transmitted power difference determining unit determines that described transmitted power difference surpasses the threshold value that is provided with based on described maximum transmit power difference, a carrier wave that has low transmitted power in by described first carrier and described second carrier wave is connected to the hand-off request of the wireless base station transmission of wireless communication terminal at a carrier wave that has low transmitted power in described first carrier and described second carrier wave.
16. wireless communication terminal according to claim 15, wherein, it is poor that described transmitted power difference calculator calculates transmitted power with predetermined period,
Described wireless communication terminal also comprises: the difference power determining unit, and it is poor with the transmitted power that predetermined period calculates to be configured to based on described transmitted power difference calculator, determines whether the transmitted power difference increases; Wherein,
When definite transmitted power difference was increasing, described hand-off request transmitter has low transmitted power in by described first carrier and described second carrier wave a carrier wave was connected to the hand-off request of the wireless base station transmission of wireless communication terminal at a carrier wave that has low transmitted power in described first carrier and described second carrier wave.
CN200780028454.8A 2006-07-28 2007-07-27 Wireless communication method, base station control apparatus and wireless communication terminal Expired - Fee Related CN101496434B (en)

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JP2006207239A JP4732265B2 (en) 2006-07-28 2006-07-28 Wireless communication method and wireless communication terminal
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